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What percent of calories from plant proteins/amino acids are actually absorbed? (PDCAAS)

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Like it means YAY I can eat more soybeans and beans. But beans have recently been killing me when I ate too many [mostly through inducing sleepiness maybe from the carbs]

But what is the bioavailability of plant proteins from tofu relative to soybeans?

Edited by InquilineKea
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  • InquilineKea changed the title to What percent of calories from plant proteins/amino acids are actually absorbed? (PDCAAS)

I read the Reddit thread but the OP there seems to carry some bias. 

I think the DIAAS is a more recent concept with respect to PDCAAS, probably also more refined.

There has been a discussion on it. Some vegetable proteins, like soy protein, have a DIASS of 100, which means good bioavailability (completeness of EAAS) and ileal digestibility. Roasted pistachios also have a good DIAAS. Research is still at the early stages. Digestibility has been tested in pigs and not rats, which makes the research more meaningful to humans.



Edited by mccoy
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From the posted thread, I quote myself:



It is interesting to observe that soy protein seems to have a 100% DIAAS, similar to some animal protein. In a few words, if eating 0.66 g/kg/d (the average value for daily protein requirement) soy protein, on average we'll  sufficient absorption of all EAAS.

In my case, with a present bodyweight of 148 pounds = 67 kg, my EAAs needs would probably (on average) be satisfied with 44 grams of soy protein (or whatever other protein with 100% DIAAS).

That's how much protein is contained in about 1150 grams of soymilk, or 330 grams extra firm tofu (source: cronometer app). This is a good argument for a vegan diet; EAAs requirements are satisfied by soy products and mixtures of soy and other cereal protein (with soy prevalent over the cereals).

I remember that during my vegan stint I was able to gain some muscle mass by drinking soymilk and using soy protein and mixtures of cereal protein (often soymilk blended to pea or soy protein). 


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