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I am sure most of you already know this but thought worth posting anyway, it has been shown by a Penn State study (still trying to find the Abstract) and others that a diet low in fat lowers test levels.
Probably no real surprise to many, but more importantly, a diet with a high polyunsaturated to saturated fat ratio results in low test, both monounstaurated and saturated have been shown to raise test levels.
Now this doesn't mean going on a high fat diet will continue raising test levels (although it might to a degree), but what I wanted to point out is that people who think replacing saturated fat with polyunsaturated or getting most of their fat from polyunsaturated sources, are not only putting themselves at higher risk cancer but also lowering their test levels.
A couple of studies I found off the bat
Relationships between types of fat consumed and serum estrogen and androgen concentrations in Japanese men.
Nagata C, Takatsuka N, Kawakami N, Shimizu H.
Department of Public Health, Gifu University School of Medicine, Japan.
The relationships between types of fat consumed and serum concentrations of estrone, estradiol, total and free testosterone, dihydrotestosterone, and sex hormone-binding globulin were examined in 69 Japanese men aged 43-88 years. Diet was assessed by a semiquantitative food frequency questionnaire. Intake of saturated, monounsaturated, and polyunsaturated fats was inversely correlated with serum total testosterone after controlling for age, total energy, body mass index, alcohol intake, and smoking status, but the correlation was statistically significant only for polyunsaturated fat (r = -0.29, p = 0.02). Intakes of eicosapentanoic and docosahexaenoic acids, n-3 fatty acids from fish, were significantly inversely correlated with total testosterone (r = -0.25, p = 0.04 and r = -0.32, p = 0.01, respectively). Serum estrone, estradiol, and free testosterone were not significantly correlated with any type of fat studied. The correlations of total testosterone with n-3 fatty acids from fish remained significant after additional adjustment for the other categories of fat (r = -0.27, p = 0. 03 for eicosapentanoic acid and r = -0.32, p = 0.01 for docosahexaenoic acid), while the correlations with saturated and monounsaturated fats became nearly null after the adjustment.
Unfortunately it doesn't mention the effect directly on free test.
The part I highlighted in blue suggests you don't overdo the EFA's.
The "saturated fat is bad" and "polyunsaturated fat is good" issue is one of my pet hates.......
Probably no real surprise to many, but more importantly, a diet with a high polyunsaturated to saturated fat ratio results in low test, both monounstaurated and saturated have been shown to raise test levels.
Now this doesn't mean going on a high fat diet will continue raising test levels (although it might to a degree), but what I wanted to point out is that people who think replacing saturated fat with polyunsaturated or getting most of their fat from polyunsaturated sources, are not only putting themselves at higher risk cancer but also lowering their test levels.
A couple of studies I found off the bat
Relationships between types of fat consumed and serum estrogen and androgen concentrations in Japanese men.
Nagata C, Takatsuka N, Kawakami N, Shimizu H.
Department of Public Health, Gifu University School of Medicine, Japan.
The relationships between types of fat consumed and serum concentrations of estrone, estradiol, total and free testosterone, dihydrotestosterone, and sex hormone-binding globulin were examined in 69 Japanese men aged 43-88 years. Diet was assessed by a semiquantitative food frequency questionnaire. Intake of saturated, monounsaturated, and polyunsaturated fats was inversely correlated with serum total testosterone after controlling for age, total energy, body mass index, alcohol intake, and smoking status, but the correlation was statistically significant only for polyunsaturated fat (r = -0.29, p = 0.02). Intakes of eicosapentanoic and docosahexaenoic acids, n-3 fatty acids from fish, were significantly inversely correlated with total testosterone (r = -0.25, p = 0.04 and r = -0.32, p = 0.01, respectively). Serum estrone, estradiol, and free testosterone were not significantly correlated with any type of fat studied. The correlations of total testosterone with n-3 fatty acids from fish remained significant after additional adjustment for the other categories of fat (r = -0.27, p = 0. 03 for eicosapentanoic acid and r = -0.32, p = 0.01 for docosahexaenoic acid), while the correlations with saturated and monounsaturated fats became nearly null after the adjustment.
Unfortunately it doesn't mention the effect directly on free test.
The part I highlighted in blue suggests you don't overdo the EFA's.
The "saturated fat is bad" and "polyunsaturated fat is good" issue is one of my pet hates.......