Vitamin B6 requirement in whey protein

splinter

Ive recently been looking at the ingredients list for whey protein and came accross some interesting findings, my example is ON 100% whey protein http://www.optimumnutrition.com/prod...ard-p-201.html.

From my knowledge from my nutrition degree, furthermore one of my friends did a presentation on this vitamin in question, I know that vitamin b6 (alongside other b vitamins) is vital for amino acid metabolism.

Quite conveniantly, high-protein foods are naturally good sources of vitamin b6 which is necessary and logical considering the importance of amino acid metabolism.

My question therefore is this: Since whey protein has been isolated from milk (a naturally good source of vitamin b6 due to its protein content), the result is the consumption of protein without the necessary vitamins for proper utilisation of the protein (amino acids).

Therefore it would seem prudent to add b6 and other b vitamins for that matter to address this issue. However many products seem to lack added b vitamins, why is this so? It seems an important issue to me considering the RNI for b6 is based upon grams of protein intake per day.

I hope you understand what I am saying here if you require clarification I will elaborate.

razg

You'd be better off looking at the physiological persistence of B6 and the particular intermediaries that are required for amino acid metabolism.

ratboy83

what do you mean by the "physiological persitence" of B6? i think splinter may have been making the point that such intermediaries are B6 dependant, i.e. pyridoxal phosphate.

alex.