Does dairy cause acne? The Evidence

Q: Does dairy cause acne?

Possibly — especially skim milk. Of all the diet–acne links, dairy has the most evidence behind it. Several large observational studies have found an association between milk intake — particularly skim milk — and acne.

Of all the diet–acne links, dairy has the most evidence behind it. Several large observational studies have found an association between milk intake — particularly skim milk — and acne. The leading explanation is that milk contains hormones and raises IGF-1, a growth factor that increases oil production and skin-cell turnover.

The link is a statistical association, not proof that dairy causes acne in everyone, and whole milk shows a weaker signal than skim. Plenty of people drink milk with clear skin — but if you break out and consume a lot of dairy, it's a reasonable thing to test.

What the research says

The strongest data come from large observational studies. Adebamowo et al. (Harvard, 2005–2008) found teenagers who drank more milk — especially skim — reported more acne, and a 2018 meta-analysis in Nutrients (Juhl et al., ~78,000 people) confirmed a dose-related association across milk, low-fat and skim milk.

Mechanistically, milk raises IGF-1 and insulin and carries bioactive hormones, all of which can push up sebum production and the skin-cell turnover that blocks pores. Why skim shows a stronger signal than whole milk is still debated — added whey proteins and processing are the leading suspects.

What you can do

Try a 4–6 week reduction in milk (especially skim) and track your skin.
Watch whey and milk-protein supplements too, not just drinking milk.
Reintroduce slowly to see whether your skin reacts.

Bottom line

Dairy — skim milk in particular — has the most consistent evidence of any dietary acne trigger. It's an association, not a guarantee, but a 4–6 week reduction is a reasonable, low-risk experiment if you're breaking out.

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 adolescent girls. Dermatol Online J. 2006.
Juhl CR, et al. Dairy intake and acne vulgaris: a meta-analysis of 78,529 subjects. Nutrients. 2018.
American Academy of Dermatology — acne resources

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