Soy causes estrogen increase?
- 08-13-2005, 01:55 PM
Soy causes estrogen increase?
OK, so my girl loves Jamba Juice (they all do), and I frequently go there with her. My fav drink there is the new Matcha (green tea) Smoothie. As it contains green tea and lots of soy milk, I figured it would be a good/healthy choice. But I've been hearing that soy causes an increase in estrogen. Can anybody shed some light on this?
[Mods: Sorry if this is the wrong forum. Fell free to move it accordingly.]
- 08-16-2005, 11:45 PM
Originally Posted by ImJ2x
what is jamba juice btw, lee preist drinks that stuff in his video.
- 08-17-2005, 12:20 AM
It's the isoflavones that cause it.. I've read studies that showed that 30g of soy isolate wasn't the issue, but 30g of the active phytoestrogens (isoflavones) made some men lactate and killed their libido..
08-17-2005, 01:03 AM
08-17-2005, 01:38 AM
08-17-2005, 07:48 AM
08-17-2005, 04:26 PM
08-19-2005, 01:20 AM
08-19-2005, 11:54 AM
08-19-2005, 02:38 PM
the estrogens in soy protein are phyto(plant)estrogens. They are not the same as human estrogen, altough soy is good for people with breast cancer because it binds to the human estrogen receptors. Nothing to worry about...
08-19-2005, 02:56 PM
08-19-2005, 02:58 PM
Do some more research and get a second opinion...it is generally accepted that the whole "Soy increases estrogen in men" thing is a myth. Soy has some very healthy benefits.
08-23-2005, 05:42 PM
Again not everyone agrees with that sentiment. Also it's not just the soy. The plant is sprayed with material that is estrogenic, as well added msg. Read the article I posted. It has about 100 refs.Do some more research and get a second opinion...it is generally accepted that the whole "Soy increases estrogen in men" thing is a myth. Soy has some very healthy benefits.
08-23-2005, 05:58 PM
Maybe it wouldn't be so bad if it they could also avoid GMO's. Many claim to be non-GMO, but they still have GMO's due to some farming issue, I don't clearly recall what it is though
08-23-2005, 06:22 PM
The EU just a did a study on GMO and basically concluded there's nothing harmful about them. This is coming from a population that's exceptionally skittish about GMO.
(Of course smoking like a chimney in Paris is perfectly healthy, just not GMO!)
08-24-2005, 01:53 PM
Hidden Soy In Fast Food
'Cutting Men's Fertility'
By Antony Barnett
Public Affairs Editor
The Observer - UK
Britons' love of convenience food packed full of 'invisible' soya is a cause of declining sperm counts and a host of fertility problems, new research into its impact on Western diets reveals.
Many healthy foods such as soya milk and soya yogurt are also implicated.
A team led by Sheena Lewis, professor of reproductive medicine at Queen's University in Belfast, has conducted studies linking soya to reduced male fertility. Scientists believe chemicals in the soya bean mimic the female hormone, oestrogen.
The research is disclosed in an investigation into the multi-billion dollar global soya industry published in today's Observer Food Monthly magazine. It reveals that soya is no longer eaten just by vegetarians but used as cheap protein in most processed and fast foods.
Other research has linked the hormonal chemicals in soya to certain cancers, brain disease and developmental abnormalities in infants.
Lewis said: 'Chemicals found in soya can lower sperm count ... The results do give us concerns and there need to be further studies on a much larger scale.'
One of his team, Dr Lorraine Anderson, said: 'If you alter the oestrogen that a man is exposed to, you can not only affect their sperm quality but you can get an increase in structural abnormalities like undescended testes.' She believes this could lead to other problems later in life, such as testicular cancer.
The Soya Protein Association, which represents food makers, said: 'We have seen no convincing evidence that soya causes any harm.'
08-24-2005, 01:59 PM
The Trouble With Tofu -
Soy and the Brain
By John D. MacArthur
"Tofu Shrinks Brain!" Not a science fiction scenario, this sobering soybean revelation is for real. But how did the "poster bean" of the '90s go wrong? Apparently, in many ways - none of which bode well for the brain.
In a major ongoing study involving 3,734 elderly Japanese-American men, those who ate the most tofu during midlife had up to 2.4 times the risk of later developing Alzheimer's disease. As part of the three-decade long Honolulu-Asia Aging Study, 27 foods and drinks were correlated with participants' health. Men who consumed tofu at least twice weekly had more cognitive impairment, compared with those who rarely or never ate the soybean curd. [1,2]
"The test results were about equivalent to what they would have been if they were five years older," said lead researcher Dr. Lon R. White from the Hawaii Center for Health Research. For the guys who ate no tofu, however, they tested as though they were five years younger.
What's more, higher midlife tofu consumption was also associated with low brain weight. Brain atrophy was assessed in 574 men using MRI results and in 290 men using autopsy information. Shrinkage occurs naturally with age, but for the men who had consumed more tofu, White said "their brains seemed to be showing an exaggeration of the usual patterns we see in aging."
Phytoestrogens - Soy Self Defense
Tofu and other soybean foods contain isoflavones, three-ringed molecules bearing a structural resemblance to mammalian steroidal hormones. White and his fellow researchers speculate that soy's estrogen-like compounds (phytoestrogens) might compete with the body's natural estrogens for estrogen receptors in brain cells.
Plants have evolved many different strategies to protect themselves from predators. Some have thorns or spines, while others smell bad, taste bad, or poison animals that eat them. Some plants took a different route, using birth control as a way to counter the critters who were wont to munch.
Plants such as soy are making oral contraceptives to defend themselves, says Claude Hughes, Ph.D., a neuroendocrinologist at Cedars-Sinai Medical Center. They evolved compounds that mimic natural estrogen. These phytoestrogens can interfere with the mammalian hormones involved in reproduction and growth a strategy to reduce the number and size of predators.
Toxicologists Concerned About Soy's Health Risks
The soy industry says that White's study only shows an association between tofu consumption and brain aging, but does not prove cause and effect. On the other hand, soy experts at the National Center for Toxicological Research, Daniel Sheehan, Ph.D., and Daniel Doerge, Ph.D., consider this tofu study very important. "It is one of the more robust, well-designed prospective epidemiological studies generally available. . . We rarely have such power in human studies, as well as a potential mechanism."
In a 1999 letter to the FDA (and on the ABC News program 20/20), the two toxicologists expressed their opposition to the agency's health claims for soy, saying the Honolulu study "provides evidence that soy (tofu) phytoestrogens cause vascular dementia. Given that estrogens are important for maintenance of brain function in women; that the male brain contains aromatase, the enzyme that converts testosterone to estradiol; and that isoflavones inhibit this enzymatic activity, there is a mechanistic basis for the human findings." 
Although estrogen's role in the central nervous system is not well understood, White notes that "a growing body of information suggests that estrogens may be needed for optimal repair and replacement of neural structures eroded with aging."
One link to the puzzle may involve calcium-binding proteins, which are associated with protection against neurodegenerative diseases. In recent animal studies at Brigham Young University's Neuroscience Center, researchers found that consumption of phytoestrogens via a soy diet for a relatively short interval can significantly elevate phytoestrogens levels in the brain and decrease brain calcium-binding proteins. 
Concerns About Giving Soy to Infants
The most serious problem with soy may be its use in infant formulas. "The amount of phytoestrogens that are in a day's worth of soy infant formula equals 5 birth control pills," says Mary G. Enig, Ph.D., president of the Maryland Nutritionists Association. She and other nutrition experts believe that infant exposure to high amounts of phytoestrogens is associated with early puberty in girls and retarded physical maturation in boys. 
A study reported in the British medical journal Lancet found that the "daily exposure of infants to isoflavones in soy infant-formulas is 6-11 fold higher on a bodyweight basis than the dose that has hormonal effects in adults consuming soy foods." (A dose, equivalent to two glasses of soy milk per day, that was enough to change menstrual patterns in women. ) In the blood of infants tested, concentrations of isoflavones were 13000-22000 times higher than natural estrogen concentrations in early life. 
Soy Interferes with Enzymes
While soybeans are relatively high in protein compared to other legumes, Enig says they are a poor source of protein because other proteins found in soybeans act as potent enzyme inhibitors. These "anti-nutrients" block the action of trypsin and other enzymes needed for protein digestion. Trypsin inhibitors are large, tightly folded proteins that are not completely deactivated during ordinary cooking and can reduce protein digestion. Therefore, soy consumption may lead to chronic deficiencies in amino acid uptake. 
Soy's ability to interfere with enzymes and amino acids may have direct consequence for the brain. As White and his colleagues suggest, "isoflavones in tofu and other soyfoods might exert their influence through interference with tyrosine kinase-dependent mechanisms required for optimal hippocampal function, structure and plasticity." 
High amounts of protein tyrosine kinases are found in the hippocampus, a brain region involved with learning and memory. One of soy's primary isoflavones, genistein, has been shown to inhibit tyrosine kinase in the hippocampus, where it blocked "long-term potentiation," a mechanism of memory formation. 
Tyrosine, Dopamine, and Parkinson's Disease
The brain uses the amino acids tyrosine or phenylalanine to synthesize the key neurotransmitters dopamine and norepinephrine, brain chemicals that promote alertness and activity. Dopamine is crucial to fine muscle coordination. People whose hands tremble from Parkinson's disease have a diminished ability to synthesize dopamine. An increased incidence of depression and other mood disorders are associated with low levels of dopamine and norepinephrine. Also, the current scientific consensus on attention-deficit disorder points to a dopamine imbalance.
Soy has been shown to affect tyrosine hydroxylase activity in animals, causing the utilization rate of dopamine to be "profoundly disturbed." When soy lecithin supplements were given throughout perinatal development, they reduced activity in the cerebral cortex and "altered synaptic characteristics in a manner consistent with disturbances in neural function." 
Researchers at Sweden's Karolinska Institute at the National Institutes of Health and are finding a connection between tyrosine hydroxylase activity, thyroid hormone receptors, and depleted dopamine levels in the brain particularly in the substantia nigra, a region associated with the movement difficulties characteristic of Parkinson's disease. [11-13]
Soy Affects the Brain via the Thyroid Gland
Tyrosine is crucial to the brain in another way. It's needed for the body to make active thyroid hormones, which are a major physiological regulator of mammalian brain development. By affecting the rate of cell differentiation and gene expression, thyroid hormones regulate the growth and migration of neurons, including synaptic development and myelin formation in specific brain regions. Low blood levels of tyrosine are associated with an underactive thyroid gland.
Scientists have known for years that isoflavones in soy products can depress thyroid function, causing goiter (enlarged thyroid gland) and autoimmune thyroid disease. In the early 1960s, goiter and hypothyroidism were reported in infants fed soybean diets.  Scientists at the National Center for Toxicological Research showed that the genistein and daidzein "inhibit thyroid peroxidase-catalyzed reactions essential to thyroid hormone synthesis." 
Japanese researchers studied effects on the thyroid from soybeans administered to healthy subjects. They reported that consumption of as little as 30 grams (two tablespoons) of soybeans per day for only one month resulted in a significant increase in thyroid stimulating hormone (TSH), which is produced by the brain's pituitary gland when thyroid hormones are too low. Their findings suggested that "excessive soybean ingestion for a certain duration might suppress thyroid function and cause goiters in healthy people, especially elderly subjects." 
Thyroid Hormones and Fetal Brain Development
Thyroid alterations are among the most frequently encountered autoimmune conditions in children. Researchers at Cornell University Medical College showed that the "frequency of feedings with soy-based milk formulas in early life was significantly higher in children with autoimmune thyroid disease."  In a previous study, they found that twice as many diabetic children had received soy formula in infancy as compared to non-diabetic children. 
Recognizing the risk, Swiss health authorities recommend "very restrictive use" of soy for babies. In England and Australia, public health agencies tell parents to first seek advice from a doctor before giving their infants soy formula. The New Zealand Ministry of Health recommends that "Soy formula should only be used under the direction of a health professional for specific medical indications. . . Clinicians who are treating children with a soy-based infant formula for medical conditions should be aware of the potential interaction between soy infant formula and thyroid function." 
Thyroid hormones exert their influence during discrete windows of time. Inappropriate hormone levels can have a devastating effect on the developing human brain, especially during the first 12 weeks of pregnancy when the fetus depends on the mother's thyroid hormones for brain development. After that, both maternal and fetal thyroid hormone levels affect the central nervous system.
A 1999 study published in the New England Journal of Medicine showed that pregnant women with underactive thyroids were four times more likely to have children with low IQs if the disorder is left untreated. The study found that 19% of the children born to mothers with thyroid deficiency had IQ scores of 85 or lower, compared with only 5% of those born to mothers without such problems. 
Thyroid, Brain, and Environmental Toxins
Children exposed prenatally and during infancy to common environmental toxins like dioxin and polychlorinated biphenyls (PCBs) can suffer behavioral, learning, and memory problems because these chemicals may be disrupting the normal action of thyroid hormone. 
Soybeans grown in the United States contain residues of the pesticide dieldrin, an organochlorine similar to DDT. Although both chemicals were banned in the 1970s, dieldrin still persists in soils and is absorbed through the roots. Today it is the most toxic residue found on domestic soybeans.  In Silent Spring, Rachel Carson warned that dieldrin is nearly 50 times as poisonous as DDT. In addition to disrupting hormones, it can have long delayed neurological effects, ranging from loss of memory to mania. 
Combinations of insecticides, weed killers, and artificial fertilizers even at low levels have measurable detrimental effects on thyroid and other hormones as well as on the brain.  EPA scientists now want to upgrade the commonly used herbicide, atrazine, to a "likely carcinogen." In animal tests, atrazine attaches to sites on the hypothalamus, a crucial brain region involved with regulating levels of stress and sex hormones. 
Individuals newly diagnosed with Parkinson's disease were more than twice as likely to have been exposed to insecticides in their home, compared to those without the disease. 
Soy formulas for infants can contain other neurotoxins: aluminum, cadmium, and fluoride. Studies found that aluminum concentrations in soy-based formulas were a 100-fold greater compared to human breast milk, while cadmium content was 8-15 times higher than in milk-based formulas. In an Australian study, the fluoride content of soy-based formulas ranged from 1.08 to 2.86 parts per million. The authors concluded that "prolonged consumption (beyond 12 months of age) of infant formula reconstituted with optimally-fluoridated water could result in excessive amounts of fluoride being ingested." A study of Connecticut children revealed that mild-to-moderate fluorosis was strongly associated with soy-based infant formula use. [27-30]
In May 2000, Boston Physicians for Social Responsibility released their report, "The Toxic Threats to Child Development." In the section on neurotoxins, they concluded: "Studies in animals and human populations suggest that fluoride exposure, at levels that are experienced by a significant proportion of the population whose drinking water is fluoridated, may have adverse impacts on the developing brain." 
Iodine vs. Fluorine
The thyroid gland uses tyrosine and the natural iodine to make thyroxine (T4), a thyroid hormone containing four iodine atoms. The other, much more biologically active thyroid hormone is tri-iodothyronine (T3), which has three iodine atoms. Lack of dietary iodine has long been identified as the problem in diminished thyroid hormone synthesis.
According to the International Council for the Control of Iodine Deficiency Disorders: "Iodine deficiency has been called the world's major cause of preventable mental retardation. Its severity can vary from mild intellectual blunting to frank cretinism, a condition that includes gross mental retardation, deaf mutism, short stature, and various other defects. . . The damage to the developing brain results in individuals poorly equipped to fight disease, learn, work effectively, or reproduce satisfactorily."
This crucial role of iodine is another reason why the thyroid gland is especially vulnerable today. Canadian researcher Andreas Schuld has documented more than 100 studies during the last 70 years that demonstrate adverse effects of fluoride on the thyroid gland.  Schuld says, "Fluorine, being the strongest in the group of halogens, will seriously interfere with iodine and iodine synthesis, forcing more urinary elimination of ingested iodine as fluoride ingestion or absorption increases."
Fluorides were actually used in the past, specifically to reduce thyroid function. In the 1930s through to the 1960s fluorides at 0.9mg to 4.5mg/day were given as effective anti-thyroid medication to hyperthyroid patients."  Russian researchers in the 1980s concluded that prolonged consumption of drinking water with a raised fluorine content was a risk factor of more rapid development of thyroid pathology. 
A major source of fluoride exposure in the United States is fluoridated drinking water including foods and drinks manufactured and processed with this treated water. (Only about 5% of the world's population is fluoridated, and more than half live in North America. 99% of western continental Europe has rejected, banned, or stopped the addition of fluoride compounds to their drinking water. ) Also, approximately 45 million pounds of hydrogen fluoride are released from U.S. coal-fired plants every year into the environment.
Soy Phytates Inhibit Zinc Absorption
Another way that soybeans may affect brain function is because of their phytic acid content. Phytic acid is an organic acid present in the outer portion of all seeds. Also known as phytates, they block the uptake of essential minerals in the intestinal tract: calcium, magnesium, iron, and especially zinc. According to research cited by the Weston A. Price Foundation, soybeans have very high levels of a form of phytic acid that is particularly difficult to neutralize and which interferes with zinc absorption more completely than with other minerals.
The soy industry acknowledges the problem, noting that "one-half cup of cooked soybeans contains one mg of zinc. However, zinc is poorly absorbed from soyfoods." As for iron, "both phytate and soy protein reduce iron absorption so that the iron in soyfoods is generally poorly absorbed." 
Nutritionist Sally Fallon, author of Nourishing Traditions: The Cookbook that Challenges Politically Correct Nutrition and the Diet Dictocrats, says that as early as 1967, researchers testing soy formula found that it caused negative zinc balance in every infant to whom it was given. Even when the diets were additionally supplemented with zinc, there was a strong correlation between phytate content in formula and poor growth. She warns that "a reduced rate of growth is especially serious in the infant as it causes a delay in the accumulation of lipids in the myelin, and hence jeopardizes the development of the brain and nervous system."
Zinc and the Brain
Relatively high levels of zinc are found in the brain, especially the hippocampus. Zinc plays an important role in the transmission of the nerve impulse between brain cells. Deficiency of zinc during pregnancy and lactation has been shown to be related to many congenital abnormalities of the nervous system in offspring. In children, "insufficient levels of zinc have been associated with lowered learning ability, apathy, lethargy, and mental retardation." 
The USDA references a study of 372 Chinese school children with very low levels of zinc in their bodies. The children who received zinc supplements had the most improved performance especially in perception, memory, reasoning, and psychomotor skills such as eye-hand coordination. Three earlier studies with adults also showed that changes in zinc intake affected cognitive function. 
New research has identified a specific contingent of neurons, called "zinc-containing" neurons, which are found almost exclusively in the forebrain, where in mammals they have evolved into a "complex and elaborate associational network that interconnects most of the cerebral cortices and limbic structures." This suggests the importance of zinc in the normal and pathological processes of the cerebral cortex.  Furthermore, age-related tissue zinc deficiency may contribute to brain cell death in Alzheimer's dementia. 
To produce soy milk, the beans are first soaked in an alkaline solution, then heated to about 115 degrees C in order to remove as much of the trypsin inhibitors as possible. Fallon says this method destroys most, but not all of the anti-nutrients, however it has the "unhappy side effect of so denaturing the proteins that they become very difficult to digest and much reduced in effectiveness." Furthermore, phytates remain in soy milk to block the uptake of essential minerals.
Only a long period of fermentation will significantly reduce the phytate content of soybeans, as well as the trypsin inhibitors that interfere with enzymes and amino acids. Therefore, fermented soy products such as tempeh and miso (not tofu) provide nourishment that is easily assimilated. _____
Links to Further Information Soy Online Service Weston A. Price Foundation
1. White LR, Petrovich H, Ross GW, Masaki KH, Association of mid-life consumption of tofu with late life cognitive impairment and dementia: the Honolulu-Asia Aging Study. Fifth International Conference on Alzheimer's Disease, #487, 27 July 1996, Osaka, Japan.
2. White LR, Petrovitch H, Ross GW, Masaki KH, Hardman J, Nelson J, Davis D, Markesbery W, Brain aging and midlife tofu consumption. J Am Coll Nutr 2000 Apr;19(2):242-55.
3. Doerge and Sheehan, Letter to the FDA, Feb 18, 1999.
4. Lephart ED, Thompson JM, Setchell KD, Adlercreutz H, Weber KS, Phytoestrogens decrease brain calcium-binding proteins... Brain Res 2000 Mar 17;859(1):123-31.
5. Soy Infant Formula Could Be Harmful to Infants: Groups Want it Pulled. Nutrition Week, Dec 10, 1999;29(46):1-2.
6. Cassidy A, Bingham S, Setchell KD, Biological effects of a diet of soy protein rich in isoflavones on the menstrual cycle of premenopausal women. Am J Clin Nutr 1994 Sep;60(3):333-40.
7. Setchell KD, Zimmer-Nechemias L, Cai J, Heubi JE, Exposure of infants to phyto-oestrogens from soy-based infant formula. Lancet 1997 Jul 5;350(9070):23-27.
8. Enig MG, Fallon SA, Tragedy and Hype, The Third International Soy Symposium. Nexus Magazine Vol 7, No 3, April-May 2000.
9. O'Dell TJ, Kandel ER, Grant SG, Long-term potentiation in the hippocampus is blocked by tyrosine kinase inhibitors. Nature 1991 Oct 10 353:6344 558-60.
10. Bell JM, Whitmore WL, Cowdery T, Slotkin TA, Perinatal dietary supplementation with a soy lecithin preparation: effects on development of central catecholaminergic neurotransmitter systems. Brain Res Bull 1986 Aug;17(2):189-95.
11. Zetterstrom RH, Williams R, Perlmann T, Olson L, Cellular expression of the immediate early transcription factors Nurr1 and NGFI-B suggests a gene regulatory role in several brain regions including the nigrostriatal dopamine system. Brain Res Mol Brain Res 1996 Sep 5;41(1-2):111-20.
12. Castillo SO, Baffi JS, Palkovits M, Goldstein DS, Kopin IJ, Witta J, Magnuson MA, Nikodem VM, Dopamine biosynthesis is selectively abolished in substantia nigra... Mol Cell Neurosci 1998 May;11(1-2):36-46.
13. Baffi JS, Palkovits M, Castillo SO, Mezey E, Nikodem VM, Differential expression of tyrosine hydroxylase in catecholaminergic neurons of neonatal wild-type and Nurr1-deficient mice. Neuroscience 1999;93(2):631-42.
14. Shepard TH, Soybean goiter. New Eng J Med 1960;262:1099-1103.
15. Divi RL, Chang HC, Doerge DR, Anti-thyroid isoflavones from soybean: , characterization, and mechanisms of action.Biochem Pharmacol 1997 15;54(10):1087-96.
16. Ishizuki Y, Hirooka Y, Murata Y, Togashi K,The effects on the thyroid gland of soybeans administered experimentally in healthy subjects. Nippon Naibunpi Gakkai Zasshi 1991 May 20;67(5):622-29.
17. Fort P, Moses N, Fasano M, Goldberg T, Lif****z F, Breast and soy-formula feedings in early infancy and the prevalence of autoimmune thyroid disease in children. J Am Coll Nutr 1990 Apr;9(2):164-67.
18. Fort P, Lanes R, Dahlem S, Recker B, Weyman-Daum M, Pugliese M, Lif****z FJ, Breast feeding and insulin-dependent diabetes mellitus in children. Am Coll Nutr 1986;5(5):439-41.
19. Regulatory Guidance in Other Countries: New Zealand Ministry of Health Position Statement on Soy Formulas (Adobe Acrobat file).
20. Haddow JE, Palomaki GE, Allan WC, Williams JR, Knight GJ, Gagnon J, O'Heir CE, Mitchell ML, Hermos RJ, Waisbren SE, Faix JD, Klein RZ, Maternal thyroid deficiency during pregnancy and subsequent neuropsychological development of the child. N Engl J Med 1999 Aug 19;341(8):549-55.
21. Hauser P, McMillin JM, Bhatara VS, Resistance to thyroid hormone: implications for neurodevelopmental research on the effects of thyroid hormone disruptors. Toxicol Ind Health 1998 Jan-Apr;14(1-2):85-101.
22. Groth E, Benbrook CM, Lutz K, Update: pesticides in children's foods, an analysis of 1998 USDA PDP data on pesticide residues, Consumers Union of U.S., Inc., May, 2000 (Adobe Acrobat file).
23. Hayes WJ, The toxicity of dieldrin to man. Bull World Health Organ 1959;20:891-92.
24. Porter WP, Jaeger JW, Carlson IH, Endocrine, immune and behavioral effects of aldicarb (carbamate), atrazine (triazine) and nitrate (fertilizer) mixtures at groundwater concentrations. Toxicol Ind Health 1999 Jan-Mar;15(1-2):133-50.
25. Watson, Traci, Common herbicide likely causes cancer. USA Today, June 29, 2000.
26. Nelson L, American Academy of Neurology's 52nd annual meeting in San Diego, CA, April 29-May 6, 2000.
27. McGraw M, Bishop N, Jameson R, Robinson MJ, O'Hara M, Hewitt CD, Day JP, Aluminium content of milk formulae and intravenous fluids used in infants. Lancet 1986 Jan 18;1(8473):157.
28. Dabeka RW, McKenzie AD, Lead, cadmium, and fluoride levels in market milk and infant formulas in Canada. J Assoc Off Anal Chem 1987;70(4):754-57.
29. Silva M, Reynolds EC, Fluoride content of infant formulae in Australia. Aust Dent J 1996 Feb;41(1):37-42.
30. Pendrys DG, Katz RV, Morse DE, Risk factors for enamel fluorosis in a fluoridated population. Am J Epidemiol 1994 Sep 1;140(5):461-71.
31. Schettler T, Stein J, Reich F, Valenti M, In Harm's Way: Toxic Threats to Child Development. Greater Boston Physicians for Social Responsibility, May 2000.
32. Studies Dealing with Fluoride and the Thyroid Gland. See also: <http://www.tldp.com/fluoride.htmFluoride Controversy in Townsend Letter for Doctors and Patients.
33. Galetti PM, Joyet, G, Effect of fluorine on thyroidal iodine metabolism in hyperthyroidism. J Clin Endocrinol 1958;18:1102-10.
34. Bachinskii PP, Gutsalenko OA, Naryzhniuk ND, Sidora VD, Shliakhta AI, Action of the body fluorine of healthy persons and thyroidopathy patients on the function of hypophyseal-thyroid the system. Probl Endokrinol (Mosk) 1985 Nov-Dec;31(6):25-29.
35. Fluoridation Status of Some Countries, Fluoride: Protected Pollutant or Panacea?
36. <http://www.talksoy.com/nutritive1.htmSoy Nutritive Content, United Soybean Board.
37. Pfeiffer CC, Braverman ER, Zinc, the brain and behavior. Biol Psychiatry 1982 Apr;17(4):513-32.
38. U.S. Department of Agriculture, Agricultural Research Service, Food
39. Frederickson CJ, Suh SW, Silva D, Frederickson CJ, Thompson RB, Importance of zinc in the central nervous system: the zinc-containing neuron. J Nutr 2000 May;130(5S Suppl):1471S-83S.
40. Ho LH, Ratnaike RN, Zalewski PD, Involvement of intracellular labile zinc in suppression of DEVD-caspase activity in human neuroblastoma cells. Biochem Biophys Res Commun 2000 Feb 5;268(1):148-54.
08-24-2005, 07:58 PM
blah blah blah a whole lotta nothing. We think this, We think that. Why does everyone love to post all these research articles that in the end prove nothing. Wow 372 Chinese children out of how many hundred million have zinc deficiency. So silly. They should be looking at all the the damn cellular phones, toxic chemicals, and modern day stress levels if they want to see why sperm counts are down. The Asian population has been doing fine these past 4000 years or so consuming soy & soy products, no sperm/population issues there.
08-24-2005, 08:06 PM
johnny21, you don't seem to know a whole ton about statistics 372 is a pretty damn good sample size and the margin of error in a sample that big is very, very, very low.
They have done studies on cell phones, and all kinds of toxic chems, dude....have been and will continue to do so.
Look at the asians...ever notice that even the guys have a "soft" build with lots of bodyfat (even on "thin" people), much like that of a who is then but still has a layer of bodyfat? Their estrogen levels are a bit higher and I would speculate that its from endless years of conditions (i.e. eaing so much soy) that would increase E levels.
08-24-2005, 08:16 PM
Not as much soy is consumed in Asia as most people think.The Asian population has been doing fine these past 4000 years or so consuming soy & soy products, no sperm/population issues there.
08-24-2005, 08:36 PM
Maybe I don't know too much about statistics. What I do know is that it is important to get the facts before you make a statement. If you had taken the time to read the above post you would see that the 372 children were not a random sample. They were obviously chosen specifically for zinc deficiency, nothing at all to do with soy products. They don't mention the childrens diet or how they became deficient, how many times a week they eat soy or other foods. I guess they are figuring that that since they are Chinese they eat soy. See, that is the problem. So what happens, a study shows that phyates in soy may inhibit zinc absorption, and therefore it must be the soy caused the zinc deficiency in the 372 children. People have a theory, they do a little study, then they find other unrelated studies and then try to connect the dots. No too scientific.Originally Posted by kwyckemynd00
And no I have not noticed that most Asian men have increased bodyfat with soft builds. Maybe you are refering to Post WWII Asians, after the introduction of Western wonders such as Coca-Cola & McDonalds.
But you know what? Maybe that is why on those daytime shows that have the transvestites posing as real woman and you have to guess which ones are really woman an which ones are men the Asian ones are the hardest to figure.
08-24-2005, 08:45 PM
08-24-2005, 09:09 PM
I wasn't concerned with the study, really...Originally Posted by jonny21
The increased bodyfat is just a fact. Different types of people have different types of bodies. black men avg. 12% BF, white males 15%, asian males 17%. Its just the way it is...And no I have not noticed that most Asian men have increased bodyfat with soft builds. Maybe you are refering to Post WWII Asians, after the introduction of Western wonders such as Coca-Cola & McDonalds.
LOL...possibly.But you know what? Maybe that is why on those daytime shows that have the transvestites posing as real woman and you have to guess which ones are really woman an which ones are men the Asian ones are the hardest to figure.
But I saw a white tranny once that looked like one of the most beautiful women I'd ever seen and I felt like a total homo b/c I thought to myself...."well, she probably had the vaginaplasty, so wtf, right?" LOL....
08-25-2005, 03:48 AM
jeez... what's happened to my thread, LOL?
Actually, I've seen enough to scare me away from Jamba Juice's soy drinks. But I'm gonna miss the Matcha smoothies...
08-25-2005, 03:54 AM
LOL...I'm sure you'll be fine to have something like that on occasion, bro. Just don't drink them all day long!
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