marochka_raduga wrote:Once he learns how to eat for gaining muscle/losing fat, then he can learn the tweaks like making sure he's not eating too much protein. If we encouraged obese people to wait to begin a muscle-sparing fat loss diet until they knew how to do everything perfectly, they'd all die of massive coronaries and stroke!
Brains... on... same... wavelength.
If you're fat, you just need to get on
any plan at all to start, and remain on some plan (I get bored easily, so I'll probably change around a bit) for the rest of your life. Hopefully the plans won't kill you. Humans lived for millennia on less-than-perfect, omnivorous diets, and we're very tolerant of eating the wrong things for prolonged periods, though eventually they might do us in. Witness the obesity and Type 2 diabetes "epidemic" in the USA as a direct result of USDA recommendations to eat more carbohydrates and fewer fats.
Now, there's a question: what does the science say? I don't want to plunge into all the specific studies, but 2g of protein per kg of body weight is an extremely defensible position, with ample research indicating it's a fine ratio for athletes. I weigh 211 lbs (95.7kg), so at least 70g per day (bare minimum US recommendation for average weight/height people) up to 190g of protein per day would have some scientific basis.
Beyond that 2g protein per kg ratio, you're diving into the world of anecdote and bodybuilding culture. That said, for those who are not currently in renal failure
the only downside to high consumption of protein is excess nitrogen. Period. What's the long-term toxicity of excess nitrogen? In people with kidney failure, well, death is the result. In people with healthy kidneys, there appear to be no problems at all. For those with a genetic tendency toward kidney stones (IIRC, some 3%-5% of all people), consumption of large amounts of water is a requirement to avoid kidney stones.
All this points to the fact that
your body pisses out the excess nitrogen as urea. Sure, it's toxic, but so are a lot of by-products that end up in the toilet.
My only point is, you can be perfectly justified consuming up to 2g per kg of body weight of protein per day if you want to, and if your kidneys function adequately. Beyond that, there are a lot of people who claim it builds more muscle mass.
It's your body. It's your science project.
--Matt B.