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amino acid questions

protein glycine taurine

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#1 experimenting

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Posted 09 December 2019 - 12:43 AM

Why would you feel/notice the effects of single (or a few) amino acids taken in pill form, versus when you drink a protein shake?

I’ve seen this discussed and noticed it myself. For example will get drowsy on 1g taurine taken in a pill (even with food) but would hardly feel it in a whey shake (similar for glycine).

I don’t really understand the concept of free aminos and peptides, could someone shed some light on these concepts?

#2 Believer

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Posted 09 December 2019 - 06:42 PM

They share the same transporters in some cases and therefore compete with each other. Some also antagonize each other. Food also can decrease the absorption of chemicals for very obvious reasons, not everything that goes into your mouth is bioavailable especially if the quantity is large. The more you eat = the less of it is bioavailable.


Peptides are proteins which can bind to receptors and cause a cascade of effects in virtue of their amino acid composition.

Peptides have no relevance to the question of the effects of individual amino acids.

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