David Allison

It's not the direct effect of the studying.

It's the substitution effect.

Right.

So if I literally drank, I handed you a drink when we came in, one of my favorite playtime things.

I love to play with these different protein products and have fun with them.

And this is a drink that has 20 grams of protein and 90 calories, almost pure protein.

And there are other things like that.

If you or I were to say, I just want as much protein as I can, so I'm just going to live on that stuff.

there would be no, to my knowledge, no direct harm.

I'm not worried about my kidneys shutting down or something.

But I would say, well, wait a minute.

Did you have any vitamins and minerals?

Did you have any pleasure from eating other foods?

Did you have enough energy to work out hard by not having any carbohydrate?

Maybe a little carbohydrate would make you able to work a little harder.

So I think there are other losses.

But beyond those other losses, or if you get a fatty acid deficiency because you haven't had any linoleic acid, beyond the losses, I don't know of any risk.

So to me, I look at it and say, life support, basic maintenance, RDA.

Strong evidence for thriving, 2-ish.

Above 2, probably more benefit, but you're starting to hit the asymptote.