how much protien can your body handle at once
- 01-28-2009, 03:40 PM
- 01-28-2009, 03:41 PM
- 01-28-2009, 04:09 PM
This is straight from an exercise physiology book:
The daily protein intake is used to maintain existing tissue protein, hormones, and enzymes. If more is taken in than is needed, the "extra" is oxidized for metabolic needs, and fat mass is not increased. The same is true for carbohydrates. Ingested carbohydrates are used to fill liver and muscle glycogen stores; the excess is oxidized and is not converted to fat. Carbohydrate intake promotes its own oxidation.When "extra" fat is added to the diet, the same amounts of carbohydrate, fat, and protein are oxidized as before; the extra fat is stored in adipose tissue. Fat intake does not promote its own oxidation. Fat oxidation is determined primarily by the difference between total energy expenditure and the amount of energy ingested in the form of carbohydrate and protein.
I know it doesn't directly answer your question, but you may get some idea from it.
01-28-2009, 05:17 PM
01-29-2009, 05:20 AM
01-29-2009, 11:49 AM
01-29-2009, 12:06 PM
01-29-2009, 12:48 PM
Real absorption into muscle? well a pound of muscle is around 160g of protein. I dont know of much even in the way of gear that lets you build a pound a day of actual muscle for any length of time.
What my studies have shown is that for muscle building likely milk isolate taken as 30g of protein worth 6-8x a day is optimal for muscle repair and growth.
01-29-2009, 12:56 PM
Many studies have been done, which indicate that approximately--even intense exercisers; the body only needs 1.2 - 1.5 gram of protein per KILOGRAM of body weight per day, NOT pounds.
01-29-2009, 12:57 PM
01-29-2009, 01:01 PM
I've found that I can get optimal use between 25-40 grams with whole foods. It isn't scientific but I haven't found better gains at a higher amount per meal. Those meals are usually 2-3 hours apart.
01-29-2009, 01:47 PM
Great thread! I always hear rumors that 30g at a time is the max you can absorb per meal naturally (and this only every 2.5 - 3 hours) I've also been told protein uptake could exceed 50g a sitting with anabolics. Of course this is just what I hear from the gym rats so I have no clue. Keep the posts coming hopefully someone has some published studies they can post.
01-29-2009, 01:51 PM
my information comes from a well documented and resources exercise physiology book which I used at the university level.
01-29-2009, 01:52 PM
01-29-2009, 01:55 PM
You do realize that no matter how much protein you take in your body will only use what it needs to maintain tissue and growth then will oxidize the rest... Which has been proven to be within that range. Anabolics are the exception..
01-29-2009, 01:58 PM
01-29-2009, 02:00 PM
This is because your body has an amino acid pool and repair doesn't require as much protein as you think
01-29-2009, 02:03 PM
Please explain why you believe all the studies that are done are flawed. If this were true they wouldn't get published.
01-29-2009, 02:04 PM
01-29-2009, 02:06 PM
01-29-2009, 02:07 PM
01-29-2009, 02:08 PM
Sorry russ, "Many studies" isn't exactly an objective term. I didn't mean to discredit your information, I was just looking for others to contribute and preferably do so citing sources. Or at least let us know where they obtained their info. (which you now have) Also it would be nice to know the anabolic side of the story too.
01-29-2009, 02:09 PM
01-29-2009, 02:10 PM
01-29-2009, 02:10 PM
01-29-2009, 07:36 PM
Russ, please start checking out some other sources than your exercise physiology book. You did the same thing in the other thread I read. Please read up on current studies through pubmed or science direct or something like that. Anything can get published as long as it relates correctly to the group being studied. Hardly any studies ever make inferences on to what else the study relates to. Many studies are flawed, yes. Many studies still get published, yes.
I've read in a few places, 12g of whey can be absorbed an hour. It really depends on how long the protein is actually in contact with the intestine where absorption occurs. Things such as fiber, protein type and fats can slow down or speed up the amount of time in transit.
Furthermore, there have been some studies that show certain proteases can help increase the amount of protein absorbed. The truth is, the amount absorbed is probably more than they think but less than the amount bodybuilders believe. The other question is, does the body really need that much protein to build muscle or not. Until we can do more human studies that aren't invasive or have better research methods, we won't know the answer. Right now there really don't exist any kind of tests that can be done to determine exactly how much is absorbed or needed.
01-29-2009, 08:34 PM
01-30-2009, 03:48 AM
01-30-2009, 06:30 AM
01-30-2009, 06:35 AM
01-30-2009, 11:09 AM
The thing about calories from protein is that each gram that is broken down into glucose for fuel will actually provide less than the 4 cal/g because it takes a considerable amount of energy to break the protein down.
01-30-2009, 01:43 PM
02-11-2009, 09:27 AM
I've read a study done at FIU which stated only about 60g protein gets absorbed and metabolised in one sitting
02-13-2009, 03:08 PM
yea, I have always figured between 50 and 65g of protein for one sitting. If we are talking a post work out shoot for the higher end, any other meal right around 50. Assuming you are actually doing intense work outs. If you want the gains, you will make sure your body is never starved for protein. Any extra is just some expensive calories.
02-21-2009, 08:14 AM
02-21-2009, 11:46 AM
Hypothetically... Lets say you eat 40g of casein and 40g of whey in one sitting.
The whey will be used but so will the casein because its stretched out up to 6-8hrs? Correct?
Basically with the meal above... more protein would be used than say... 80g total from just chicken?
02-21-2009, 11:54 AM
02-21-2009, 12:10 PM
02-21-2009, 12:19 PM
whey is usable at somewhere from 8-10g/hr absorption wise. any since meal of whey over 30g still shows negligible amino acids in blood stream at 4 hours. Its not totally "wasted" but the body will use gluconeogenesis and turn the protein into glucose instead if its more than it can use as protein. taking 10g whey an hour works out fine, or even down to taking 3-4g every 20 min. I made some pb+ whey "balls" that work out to about that much to try it, but its a total pita to do that long term so i gave up
02-22-2009, 03:53 AM
Great post! But what a bummer. This explains why I always felt that even though my Protein intake was not too high and total cals were on the low end, I seemed to slowly get fatter using whey as a staple shake, aside from meat and egg protein. I guessed it was some type of insulin spike...Thanks for the clarification!
Any suggestions on an alternative source that allows for a higher absorbtion rate, say, every 2-3 hours?
Shakes are critical for me, due to my work schedule which only allows very short breaks during the day. Only long enough to shove down some carbs and a shake.
Thanks again EJL!
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