Does whey protein cause acne?

Whey protein is a common breakout trigger reported by gym-goers, and there is some support for it. Whey strongly raises IGF-1 and insulin, both of which can increase sebum and contribute to acne. Several case reports describe acne improving after stopping whey.

The evidence is limited and individual — many people use whey with no skin issues. If you started breaking out after adding whey, it's one of the easier things to test by elimination.

What the research says

The case for whey is built on case series rather than large trials. Several reports (e.g. Simonart, Dermatology 2012; Pontes et al. 2013) describe acne appearing after starting whey and improving after stopping it, often in young male gym-goers.

The proposed mechanism is the same as milk's: whey strongly raises insulin and IGF-1, which increase sebum and follicular activity. Because the evidence is largely anecdotal, the cleanest test is elimination — stop for a few weeks and watch.

What you can do

• Pause whey for 4–6 weeks and watch your skin.
• Consider a plant-based protein as a swap during the test.
• Keep training hygiene tight: cleanse after workouts.

Bottom line

Whey is a plausible trigger for some people, especially if breakouts started after you added it. The evidence is limited, so test it by elimination rather than assuming.

Vet your skincare too

Diet is only one piece. Many breakouts are driven by what you put on your skin. Paste your products into our comedogenic ingredient checker to rule out pore-clogging ingredients, and check for fungal-acne triggers if your bumps are small and itchy.

Sources & further reading

• Simonart T. Acne and whey protein supplementation among bodybuilders. Dermatology. 2012.
• Pontes T de C, et al. Incidence of acne vulgaris in young adults using protein-calorie supplements. An Bras Dermatol. 2013.
• American Academy of Dermatology — acne resources

By Mitchell Zandwijken · Last updated July 2026. See our sources & methodology.