Many bodybuilders and professional athletes use whey protein isolates and soy protein isolates as dietary supplements for muscle development. Is any of them better than the other?
One recent study by the University of Granada in Granada, Spain shows that soy protein is better than whey protein.
What are the highlights of this study?
- Rats fed on the whey protein diet expelled more calcium than rats fed on the soy protein diet.
- Rats fed on the whey protein diet had lower urinary pH than rats fed on the soy protein diet.
- The results on the renal morphologic parameters or other plasma renal biomarkers like albumin or urea differences remained the same for both groups.
What does the result mean?
Rats that were given whey protein are more prone to develop nephrolithiasis (the process of forming a kidney stone) than those eating soy protein.
It also suggests that soy protein may boost “a more alkaline plasma and urinary profile, with their consequent renal advantages” when compared to whey protein.
A lower pH can lead to the risk of developing kidney stones. If you train competitively in sports, where you get your protein is important. This study gives you an idea why you should opt for soy protein instead of whey protein.
TIP: If you have kidney stones, take potassium citrate to remove them. The elimination of kidney stones will take a few days.