Quote:
Originally Posted by Konflict
I've been having protein powder on and off for 10 plus years, and mainly I'd take it just to fuel my body back after a workout. The whey protein only made up about 1/25 of my total calories in the day. I was trying to eat a lot of protein so I would keep my muscle and not lose it when going low carb.
But my diet changed pretty drastic, before I was eating a lot of whole wheat, fruits, grains....I basically stopped all that when I starte the diet.
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Let's look at whey protein in detail, just to see how much value it really has.
1/25 of total calories per day
Think about that for a moment. Could that tiny amount do anything significant for you, in a day, in a month, in a year, in a decade? Could you get the same amount from another source, like fresh meat for example? Between whey and some other source (choose the source as you wish), which one is superior in your opinion? Does whey protein on its own provide everything needed to digest, absorb, and metabolize the protein itself, i.e. vitamins, minerals, fatty acids? If not, then whey protein requires supplements for these other elements. Could these elements be provided by other protein sources, like fresh meat for example? Finally, is whey protein genuine food, does it nourish you?
I realize that you believe whey protein is good to recover from a workout, but think about that for a moment. Does a workout somehow change the nature of your body, so that you need whey protein specifically to recover, and not some genuine food instead? Think about any other species that does workout, well not really, they just hunt, eat, rest, repeat. Do they require anything special after exertion, other than eat what they caught? Why would humans require anything special, other than genuine food, for the same purpose?
These are all reasonable questions, I'm not sure I have all the answers. Have you read any experimental studies on whey protein with regards to post-workout recovery? I have, I forgot all of them. I see no point in arguing in favor of whey protein when I believe there are superior sources of protein, for the protein itself, and for all other essential elements as well, all of which is required to recover from a workout, or from any other activity.
Consider a growing child. He grows bigger through the years due to growth hormone. It's as if he was working out all the time, therefore it's as if he needed to recover all the time from the constant workouts. Does this child need whey protein, or does he need genuine food? The idea here is that when we lift heavy weights for example, we stress the muscles, they then grow as a result of this stress. A growing child, well, grows. The cause of this growth is the same for both the adult after a workout, and a growing child - growth hormone. There is no difference, the physiological requirements for growth are the same, the cause is the same, the materials required for this growth is the same, the mechanisms for growth are the same. What is the rationale for whey protein at any point for anybody for any purpose?
We could do the same analysis for carbs, because we believe carbs are good for post-workout recovery. The first thing we should know about carbs in this context is that hyperglycemia inhibits growth hormone. All other arguments become moot, because once we inhibit growth hormone, we basically shut down the entire recovery process.
One thing about protein specifically, it is not used for energy. Ever. There is no plausible mechanism for protein to be used for energy at any time whatsoever. It is used for structure, enzymes and hormones. When we eat protein, it stimulates insulin. Once insulin goes up, all kinds of things happen.
Insulin:
Inhibits gluconeogenesis - no new glucose is created, therefore no protein is used for this
Inhibits glycogenolysis - no stored glucose is released, therefore protein does not cause blood glucose to rise
Stimulates proteosynthesis - ingested protein (actually, the amino acids from that protein) goes straight to make new protein
Inhibits proteolysis - existing protein is prevented from being broken down
We could argue that whey protein is good on its own because of the above, however it's important to keep in mind that protein synthesis requires all kinds of other elements that are not contained in whey protein, therefore whey protein on its own does very little for muscle growth, or for any other tissue.