Last reviewed October 2026. This article is for general information only and does not replace medical advice. If you have persistent or severe acne, consult a dermatologist.
The internet is full of confident claims that coffee causes acne. Cut out coffee, they say, and your skin will clear up. The actual evidence for this is thin. There’s no good research showing that coffee itself causes breakouts. What there is, however, is a plausible link between what people put in their coffee and acne – specifically milk and sugar.
What the research actually says
No controlled study has demonstrated that black coffee causes acne. The most commonly cited research points to milk, not coffee. Adebamowo and colleagues (2005) analyzed data from the Nurses’ Health Study II – 47,355 women recalling their teenage diet. The highest milk consumers had a 22% higher prevalence of acne compared to the lowest. The association was strongest for skim milk (44% higher) and weaker for whole milk (12%, not statistically significant).
Follow-up studies in teenage girls (2006) and boys (2008) from the same research group showed similar patterns. The proposed mechanism: milk contains hormones (including IGF-1 and other growth factors) that may stimulate sebaceous glands. Skim milk may be worse because the skimming process concentrates whey proteins relative to fat.
These are observational studies based on dietary recall, which means recall bias is a significant limitation. And importantly: no study has demonstrated that cutting milk improves existing acne. The American Academy of Family Physicians noted this gap in their evaluation of the evidence.
The milk connection
If you drink your coffee with milk – especially a large latte or cappuccino with 8-12 oz (240-350 ml) of steamed milk – you’re getting a meaningful dose of the compounds the Adebamowo studies flagged. A daily 16 oz (480 ml) latte with skim milk represents more dairy exposure than most people realize.
Switching to oat milk or almond milk removes dairy from the equation entirely. Whether that helps your skin depends on whether dairy was contributing in the first place, and the only way to know is to try it for 4-6 weeks and see.
Sugar and syrups
High-glycemic diets (lots of sugar, white bread, processed carbohydrates) have a more consistent link to acne than dairy does. Flavored syrups, whipped cream, and sweetened coffee drinks add 20-60 g of sugar per serving. If your coffee order routinely comes with that kind of sugar load, it’s contributing to your glycemic burden – which is associated with increased sebum production and acne in some studies.
Making healthier choices at the coffee shop – black coffee, lower-sugar options, or unsweetened plant milk – removes this variable.
Cortisol and sleep
One theory that circulates online is that caffeine raises cortisol (a stress hormone), and cortisol triggers acne. Caffeine does temporarily elevate cortisol, but the increase is modest in habitual drinkers and returns to baseline quickly. There’s no clinical evidence that coffee-induced cortisol elevation is sufficient to cause or worsen acne in otherwise healthy people.
Sleep is a different story. If caffeine is disrupting your sleep quality, and poor sleep is raising your baseline cortisol, the downstream effect on skin is real but indirect. The fix is managing caffeine timing, not eliminating it.
What to try if you suspect coffee is involved
- Switch to black coffee for 4-6 weeks. If your skin improves, it was probably the milk or sugar, not the coffee.
- Replace dairy with plant milk. Oat, almond, or soy. See if the pattern changes.
- Cut flavored syrups and sweeteners. Reduce your daily sugar intake from coffee by half and see what happens.
- Check your caffeine timing. If you’re drinking coffee after 2 PM and sleeping poorly, the sleep disruption may be the real problem.
When to see a dermatologist
See a dermatologist if:
- Your acne is cystic, painful, or leaving scars
- Over-the-counter treatments haven’t helped after 8-12 weeks
- Acne appeared suddenly in adulthood without a clear trigger
- You’ve tried dietary changes for 6+ weeks without improvement
Frequently asked questions
Does coffee cause acne?
There’s no good evidence that black coffee causes acne. The associations in research point to milk (especially skim milk) and sugar, which are common coffee additions. If your coffee is black, it’s unlikely to be contributing to breakouts.
Does milk in coffee cause breakouts?
Possibly. The largest study (Adebamowo 2005, NHS II) found skim milk associated with 44% higher acne prevalence. The evidence is based on dietary recall and no study has proven that cutting milk clears acne, but the hormonal mechanism is plausible enough that a 4-6 week dairy elimination trial is reasonable.
Is black coffee bad for skin?
No evidence suggests it is. Black coffee has zero sugar, zero dairy, and a modest calorie count. Caffeine in skincare products is sometimes used topically for its anti-inflammatory properties. The problems, when they exist, typically come from what’s added to the coffee.
Does caffeine raise cortisol enough to cause acne?
Unlikely. Caffeine causes a temporary cortisol spike that habitual drinkers quickly adapt to. There’s no clinical evidence linking this modest, transient increase to acne development. Chronic stress and poor sleep raise cortisol more significantly and are better-supported contributors to skin problems.
Should I quit coffee for clear skin?
Probably not necessary. Try switching to black coffee or plant milk first. If your acne persists after 4-6 weeks of eliminating dairy and sugar from your coffee routine, the coffee itself is unlikely to be the cause. A dermatologist can help identify the actual triggers.
Sources
- Adebamowo CA, Spiegelman D, Danby FW, Frazier AL, Willett WC, Holmes MD. High school dietary dairy intake and teenage acne. J Am Acad Dermatol. 2005;52(2):207-214. PubMed 15692464
This article is for general information only and does not replace personalized medical advice. If you are concerned about acne or how your diet affects your skin, consult a dermatologist.
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