Also known as: whey isolate, whey concentrate
Latest evidence update: 2026-04-27
Strongest in Sample size (86). Held back by Recency (39).
Solid mix of RCTs with some methodological gaps.
Confirmed across many independent studies with significant findings.
Tens of thousands of participants pooled across studies.
Mostly aligned, with some divergence.
Evidence base skews older; field may have moved on.
Effect-size tagged on 397 of 400 claims for this supplement. Our research updates daily; remaining claims are pending re-processing.
Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.
May help trained athletes improve endurance performance
Helps manage muscle loss in older adults when combined with exercise
Does not significantly affect bone formation markers in athletes
Does not improve sleep quality or next-morning physical and mental performance
Recommended: 20-40g daily
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
Does not reduce inflammation markers in athletes