Does milk cause acne?

Milk shows up repeatedly in acne research. Observational studies link higher milk intake — especially skim milk — with more acne, likely because milk raises IGF-1 and carries hormones that increase oil production. Skim milk shows a stronger association than whole milk, possibly due to processing and added proteins.

It's an association, not a guarantee, and many people drink milk with clear skin. But if you're prone to acne and drink a lot of milk, it's a sensible thing to test.

What the research says

Milk is the most-studied dietary link. Observational studies (Adebamowo et al.) and a 2018 meta-analysis (Juhl et al., ~78,000 people) repeatedly associate higher milk intake — especially skim — with more acne.

Milk raises IGF-1 and carries hormones that increase sebum; skim shows a stronger association than whole milk, likely due to processing and added proteins.

What you can do

• Trial reducing milk (especially skim) for 4–6 weeks.
• Check whey and milk-protein supplements too.
• Reintroduce gradually and watch your skin.

Bottom line

Milk — skim in particular — has the strongest evidence of any single food. It's an association, not a certainty, so test a 4–6 week reduction if you're prone to breakouts.

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

• Adebamowo CA, et al. Milk consumption and acne in teenagers. Dermatol Online J. 2006.
• Juhl CR, et al. Dairy intake and acne vulgaris: a meta-analysis. Nutrients. 2018.
• American Academy of Dermatology — acne resources

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