Whey protein supplementation lowers blood triglyceride levels in adults with high triglycerides.

Is it true that Whey protein supplementation lowers blood triglyceride levels in adults with high triglycerides?

Partly. One 12-week RCT in overweight/obese adults reported significantly lower fasting triacylglycerol with whey protein versus control, while a meta-analysis in older adults and a trial in older men with type 2 diabetes found no significant change in lipid or cardiometabolic markers. The evidence covers only part of the claim and points in both directions.

Verdict: CONTESTED PARTIAL · 1 source for, 2 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Effects of whey protein isolate on body composition, lipids, insulin and glucose in overweight and obese individuals. (n.d.). cir.nii.ac.jp. https://doi.org/10.1017/s0007114510000991

M, K., S, F., R, J., SK, R., ME, S., Z, A. B., ML, F., F, D., & A, B. (2025). Effects of Whey Protein Supplementation on Body Composition, Muscular Strength, and Cardiometabolic Health in Older Adults: A Systematic Review with Pairwise Meta-Analysis.. doi.org. https://doi.org/10.3390/healthcare13212814

JL, R., MH, D. S. L., MV, G., AMS, d. L., JR, D. S., VC, d. S., JMD, G., FS, C., GE, F., & AC, A. (2026). Effect of resistance training combined with carbohydrate and protein supplementation on the HOMA-IR, glycemic, lipid profile and hypertrophy of older adults with Type II Diabetes: secondary data analysis of a triple-blind RCT.. doi.org. https://doi.org/10.1007/s40520-026-03374-8