Whey protein absorbs faster than casein or soy protein. An RCT (Tang et al., J Appl Physiol 2009) showed whey stimulates muscle protein synthesis 93% more than casein and 31% more than soy after resistance exercise. The rapid leucine spike is the primary driver.
How should I track Protein powder, whey?
Protein powder, whey is high in protein. Supplement tracking comes down to two things: measuring the supplement itself and logging everything around it. For powders like Protein powder, whey, a kitchen scale beats a scoop — scoops typically deliver 10–20% more than the stated serving (Almiron-Roig et al., Appetite 2013, found portion errors of 50–200% for dense foods). For capsules and tablets, count-based tracking is simpler but still matters at multiple daily doses. The real tracking trap is what you mix supplements with — milk, fruit, or nut butter can turn a 30-calorie serving into a 400-calorie shake. Log each ingredient separately for an accurate total.