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Waarom whey isolaat?

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Whey & Casein Hydrolysate Protein Powder
The Claim: Protein hydrolystates (as opposed to protein isolates or concentrates) are further broken down into peptide fragments from their original intact/protein-bound state. This quality is touted to make these proteins superior for muscle recovery & anabolism due to their more rapid absorption. The Facts: There is no compelling evidence that the substantially more expensive protein hydrolysates are better than concentrates or isolates for muscle anabolism. The research thus far comparing intact proteins with hydrolysates is contradictory for both whey [42,43] and casein [44,45]. This means that spending double or triple for worse-tasting protein hydrolysates is a big leap of faith.

42. Farnfield MM, et al. Plasma amino acid response after ingestion of different whey protein fractions. Int J Food Sci Nutr. 2008 May 8:1-11. [Epub ahead of print]
43. Buckley JD, et al. Supplementation with a whey protein hydrolysate enhances recovery of muscle force-generating capacity following eccentric exercise. J Sci Med Sport. 2010 Jan;13(1):178-81. Epub 2008 Sep 2.
44. Deglaire A, et al. Hydrolyzed dietary casein as compared with the intact protein reduces postprandial peripheral, but not whole-body, uptake of nitrogen in humans. Am J Clin Nutr. 2009 Oct;90(4):1011-22. Epub 2009 Aug 19.
45. Koopman R, et al. Ingestion of a protein hydrolysate is accompanied by an accelerated in vivo digestion and absorption rate when compared with its intact protein. Am J Clin Nutr. 2009 Jul;90(1):106-15. Epub 2009 May 27.


Om Mark's Daily Apple te quoten:

Whey hydrolysate is predigested whey protein that’s easily absorbed and virtually free of any potential allergens, but it’s (in my opinion) horribly overpriced. Whey in general is already highly bioavailable and easily absorbed by our bodies, so absorption is rarely an issue with whey. Hydrolysate is great marketing. That’s about it. The elite of the elite – those hulking magazine cover superheros with tanned, smiling faces atop straining, veiny necks – may have actual cause to maximize protein absorption, but you guys definitely don’t need to fuss over that stuff.
 
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