Breakouts have four drivers, and food, nutrients and gentle care all play a part

Key takeaways

• Acne is the most common skin condition in the United States, affecting up to 50 million Americans each year¹.
• A pimple forms when extra oil and sticky skin cells plug a pore, skin bacteria multiply inside, and the area turns red and swollen²³.
• In a 12 week trial of 43 young Australian men, those on a low-glycemic eating plan had fewer blemishes than those on a higher-glycemic diet²⁵.
• Zinc, omega-3s, probiotics, tea tree oil gel and niacinamide gel have all shown encouraging results in small studies of people with acne^89101214.
• Smart use means staying within NIH daily limits for zinc and vitamin A and sharing everything you take with your dermatologist⁷¹⁵.

Up to 50 million Americans deal with acne each year, which makes it the most common skin condition in the country¹. About 85 percent of people between the ages of 12 and 24 have at least minor breakouts¹. And it does not always end with the teen years. Adult acne affects up to 15 percent of women¹.

Breakouts can also shape how people feel. The American Academy of Dermatology (AAD) notes in its 2024 acne guideline that acne can affect emotional health, social life and relationships². It can also leave dark spots or scars². The guideline covers everyone from preteens around age 9 to adults².

The encouraging part is that researchers now understand much more about what drives a breakout. That science points to steps you can take at the kitchen table and the bathroom sink, alongside the care a dermatologist offers. Here is what the research shows and how the pieces fit together.

Four things happen inside a pore before a pimple appears

Each pore on your face is the opening of a hair follicle with a tiny oil gland attached (the pilosebaceous unit). The AAD describes acne as a long-term inflammatory condition of this unit². Dermatologists point to four drivers that work together.

The first driver is oil. Glands in the skin make sebum, a natural oil that keeps skin soft. When they make more than usual, the extra oil builds up inside the follicle³.

The second is a clogged pore. Skin cells lining the follicle normally shed and wash out. In breakout-prone skin, the cells pile up and turn sticky (follicular hyperkeratinization), forming a plug that traps oil below the surface²³. A closed plug is a whitehead. An open plug that darkens in the air is a blackhead, and that dark color is not dirt⁴.

The third is bacteria. A microbe called Cutibacterium acnes (C. acnes, once known as P. acnes) lives on nearly everyone’s skin². Inside a plugged, oily pore, it finds an ideal place to multiply³.

The fourth is inflammation. The body sends white blood cells to the area, and the result is the redness, swelling and pus of a pimple³. Deeper bumps can turn into tender lumps under the skin.

Hormones set much of this in motion

During puberty, both boys and girls make more androgens, hormones such as testosterone that enlarge the oil glands⁴. Bigger glands make more sebum, which helps explain why acne peaks in the teen years⁴. Hormones keep playing a part in adulthood, too. Breakouts can flare around a menstrual period or during pregnancy, and conditions such as polycystic ovary syndrome (PCOS) can be involved³.

Everyday habits can tip the balance as well. Thick, oily skin and hair products can work their way into follicles³. Friction from things that rub the skin, such as sports helmets or straps, can set off a pattern called acne mechanica³. Some medicines, including steroids, can play a part³. Stress does not cause acne by itself, but it can make existing breakouts worse⁴.

Eating patterns linked with clearer skin

For years, many people heard that food had nothing to do with acne. Newer research has opened that question back up. The strongest work focuses on glycemic load, a measure of how quickly and how much a meal raises blood sugar.

In a 12 week randomized trial in Australia, researchers assigned 43 young men with acne to one of two eating plans²⁵. One group followed a low-glycemic plan with more protein and slowly digested carbohydrates. The other ate a higher-glycemic diet. By the end, the low-glycemic group had fewer total blemishes²⁵.

Two more trials point the same way. In a study of 45 people, facial acne scores improved more on a low-glycemic plan after 8 weeks². A Korean study of 32 people also saw improvement after 12 weeks². One leading idea is that big blood sugar swings raise insulin and a related growth signal, which can rev up the oil glands⁵. Results vary from study to study, and the AAD panel named diet among the important topics for future research².

Milk is the other food researchers watch. A 2018 review pooled observational studies of 78,529 children, teens and young adults⁶. People who drank more milk were somewhat more likely to have acne, while yogurt and cheese did not show the same pattern⁶. Because these studies tracked habits rather than testing a change, they show a link rather than cause and effect.

Wondering whether food plays a part for you? A simple food and skin diary, kept for a few weeks, can help you and your clinician spot patterns. Trading some sugary drinks and white bread for whole grains, beans, vegetables and protein fits the low-glycemic pattern studied in these trials. It is also a satisfying way to eat for overall health.

Zinc, omega-3s and probiotics in acne research

Several nutrients have caught researchers’ attention because they connect to the four drivers of acne. Most of these studies are small, and early results are encouraging.

Zinc

Zinc is a mineral the body uses for normal immune function, cell growth and skin health⁷. NIH advises 8 milligrams (mg) a day for adult women and 11 mg for adult men⁷. Oysters, red meat, poultry, beans, nuts and whole grains are good food sources⁷.

A 2020 review and meta-analysis looked at zinc and acne from two angles⁸. First, people with acne tended to have less zinc in their blood than people with clear skin. Second, in the zinc studies the team pooled, people taking zinc had fewer inflamed red bumps (papules)⁸. Results vary from study to study, and researchers are still working out the best forms and doses.

Omega-3s and GLA

Omega-3 fats from fish, known as EPA and DHA, support a healthy inflammatory response. In a 10 week randomized trial in South Korea, 45 people with mild to moderate acne were split into three groups⁹. One took 2,000 mg of EPA and DHA a day, one took 400 mg of gamma-linolenic acid (GLA) from borage oil, and one took nothing extra. Both nutrient groups had noticeably fewer inflamed and non-inflamed blemishes by the end of the study⁹.

Probiotics

Your gut and your skin trade signals, an idea researchers call the gut-skin axis. In a 12 week placebo-controlled trial, 20 adults with acne took either a daily probiotic, Lactobacillus rhamnosus SP1, or a placebo¹⁰. The probiotic group saw more improvement in their skin. Skin samples also showed shifts in genes tied to insulin signaling, which links back to the blood sugar research¹⁰.

What was studied	Who took part	What researchers saw	Amount and time
Low-glycemic eating plan	43 young men with acne	Fewer total blemishes than a higher-glycemic diet	Daily meals, 12 weeks
Zinc (pooled studies)	People with acne	Fewer inflamed bumps with zinc	Varied; adult upper limit is 40 mg a day
Omega-3s (EPA and DHA)	45 people, mild to moderate acne	Fewer inflamed and non-inflamed blemishes	2,000 mg a day, 10 weeks
GLA from borage oil	Same 45 person trial	Fewer inflamed and non-inflamed blemishes	400 mg a day, 10 weeks
Lactobacillus rhamnosus SP1	20 adults with acne	More skin improvement than placebo	Daily, 12 weeks
Tea tree oil gel, 5 percent	60 people, mild to moderate acne	About 3.5 times better on total blemish count than a plain gel	Daily, 45 days
Niacinamide gel, 4 percent	76 people with inflamed acne	82 percent improved, vs. 68 percent on clindamycin gel	Twice a day, 8 weeks

Sources:^5789101214

Gentle topical options from nature and the lab

Some of the most interesting research involves what you put on your skin. These options are often gentle, and several come from plants or vitamins.

Tea tree oil

Tea tree oil comes from the leaves of Melaleuca alternifolia, a tree native to Australia¹¹. In a 45 day trial in Iran, 60 people with mild to moderate acne used either a 5 percent tea tree oil gel or a plain gel¹². The tea tree group did about 3.5 times better on total blemish count¹².

An earlier Australian study compared a 5 percent tea tree oil gel with a 5 percent benzoyl peroxide lotion in 124 people over three months¹³. Both groups had noticeably fewer blemishes. The tea tree oil took longer to show results, and fewer people using it noticed dryness, itching or stinging¹³.

Niacinamide

Niacinamide, also called nicotinamide, is a form of vitamin B3. In an 8 week trial of 76 people with inflamed acne, a 4 percent niacinamide gel was compared with a 1 percent clindamycin gel, a prescription antibiotic¹⁴. About 82 percent of the niacinamide group improved, compared with 68 percent of the clindamycin group¹⁴. Today niacinamide appears in many gentle serums and moisturizers.

Azelaic acid

Azelaic acid is a mild acid that dermatologists like because it works on several drivers at once. It helps clear clogged pores, discourages acne bacteria and calms redness². The AAD guideline gives it a conditional recommendation². It notes that azelaic acid may be especially helpful for sensitive skin or darker skin tones, since it can also fade dark spots². Harm to a developing baby is not expected from topical azelaic acid, because very little is absorbed².

The AAD’s 2024 panel also reviewed tea tree oil, zinc, niacinamide and other plant and vitamin options. It did not issue formal recommendations on them yet and named this whole area among the important topics for future research².

Smart use of supplements and natural products for your skin

Studies give you helpful guideposts. The table above shows the amounts used in trials. For zinc, NIH sets an upper limit of 40 mg a day for adults, counting food and supplements together⁷. Over time, very high zinc intakes can leave the body short on copper, so staying within that limit is a smart habit⁷.

Look for a third party quality seal, such as USP Verified, NSF Certified for Sport or ConsumerLab approved. These programs check that a product contains what its label says.

Give any new routine 8 to 12 weeks before you judge it. That is about how long most of the studies above ran⁵⁹¹⁰. Skin renews itself slowly, so patience pays off.

Tea tree oil is meant for the skin only and should never be swallowed¹¹. Some people’s skin reacts to it¹¹. Choose a ready-made gel near the 5 percent strength used in studies, and test it on a small patch first. The library’s articles on essential oils and patch testing go deeper.

The vitamin A question

Vitamin A deserves its own note. Retinoid medicines, such as adapalene gel or isotretinoin pills, are built from vitamin A chemistry²¹⁵. Taking large doses of vitamin A on your own is a different thing.

NIH sets the adult upper limit for preformed vitamin A, the kind in liver, fish liver oil and many supplements, at 3,000 micrograms a day (10,000 IU)¹⁵. Too much preformed vitamin A during pregnancy can cause birth defects, so anyone who could become pregnant should stay within that limit¹⁵. Beta-carotene from carrots and other colorful plants does not count toward it¹⁵.

If you take isotretinoin, check with your dermatologist before adding anything that contains vitamin A. Isotretinoin also requires pregnancy prevention through a program called iPLEDGE².

Above all, share your full supplement list with your dermatologist and pharmacist. That way everything you take works together with any medicine in your plan.

A gentle daily routine for breakout-prone skin

Clear skin care is mostly about being kind to your skin. Hard scrubbing, picking and piling on strong products tend to backfire. This simple checklist draws on advice from NIH and dermatology groups.

• Wash your face gently with a mild cleanser in the morning, at night and after heavy sweating⁴.

• Use your fingertips instead of rough scrub pads or strong soaps⁴.

• Pat your skin dry with a clean towel.

• Choose oil-free makeup and skin care labeled noncomedogenic, which means made not to clog pores⁴.

• Keep thick hair oils and styling products away from your forehead and hairline³.

• Let pimples be, since squeezing or picking can leave scars or dark spots⁴.

• Wash pillowcases, hats and helmet pads often.

• Skip sunburns and tanning, since many acne medicines make skin more sensitive to the sun⁴.

• Build meals around slowly digested carbohydrates, protein and plenty of plants⁵.

• Give each new product or supplement 8 to 12 weeks before judging it.

The library’s articles on moisturizers and sunscreen can help you pick products that suit breakout-prone skin.

What a dermatologist can add

Nutrition and gentle care work best as part of a bigger plan. The AAD’s 2024 guideline, published in the Journal of the American Academy of Dermatology, lays out 18 evidence-based recommendations for acne care².

Several well-studied options are sold without a prescription. Benzoyl peroxide is an over-the-counter wash or gel that targets acne bacteria². Milder strengths and wash-off versions are often easier on the skin, and it can bleach towels and pillowcases². Adapalene 0.1 percent gel, a retinoid that helps keep pores clear, is also sold over the counter, and salicylic acid helps loosen plugs².

For more stubborn breakouts, a dermatologist may suggest prescription retinoids or a topical antibiotic paired with benzoyl peroxide². The guideline advises against using a topical antibiotic on its own and encourages limiting antibiotics where possible². Oral antibiotics such as doxycycline are another choice, usually for no more than three to four months². For some women, certain birth control pills or a medicine called spironolactone are options². Hormone-based approaches usually take three to six months to show clear results². Isotretinoin is an option for severe acne, acne that scars or acne that weighs heavily on a person’s well-being².

The guideline also stresses shared decision-making, so your preferences belong in the conversation². That includes your interest in nutrition and natural approaches. See a dermatologist if breakouts are deep or painful, leave scars or dark spots, or affect how you feel about yourself. Bring a list of everything you take so your dermatologist can fit it all into one plan.

The bottom line

Acne starts with four linked steps inside the pore: extra oil, sticky skin cells, C. acnes bacteria and inflammation, with hormones nudging the process along. That gives you several places to support your skin.

Research on low-glycemic eating, zinc, omega-3s, probiotics, tea tree oil and niacinamide is encouraging, and scientists are building on these results. Pair smart food and supplement choices with a gentle routine, and give them 8 to 12 weeks to show what they can do.

Your dermatologist is a partner in all of this. Share what you eat, what you take and what you put on your skin. Together you can build a plan for clear, calm, comfortable skin.

Sources

1. American Academy of Dermatology. Skin conditions by the numbers. AAD.org. Accessed 2026. aad.org

2. Reynolds RV, Yeung H, Cheng CE, et al. Guidelines of care for the management of acne vulgaris. Journal of the American Academy of Dermatology. 2024. doi.org

3. British Association of Dermatologists and Acne Support. Causes of acne. Acne Support. 2018. acnesupport.org.uk

4. National Institute of Arthritis and Musculoskeletal and Skin Diseases. Acne (NIH Publication No. 06-4998). National Institutes of Health. 2006.

5. Smith RN, Mann NJ, Braue A, Mäkeläinen H, Varigos GA. A low-glycemic-load diet improves symptoms in acne vulgaris patients: a randomized controlled trial. American Journal of Clinical Nutrition. 2007. pubmed.ncbi.nlm.nih.gov

6. Juhl CR, Bergholdt HKM, Miller IM, Jemec GBE, Kanters JK, Ellervik C. Dairy intake and acne vulgaris: a systematic review and meta-analysis of 78,529 children, adolescents, and young adults. Nutrients. 2018. pubmed.ncbi.nlm.nih.gov

7. NIH Office of Dietary Supplements. Zinc: Fact Sheet for Health Professionals. National Institutes of Health. 2026. ods.od.nih.gov

8. Yee BE, Richards P, Sui JY, Marsch AF. Serum zinc levels and efficacy of zinc treatment in acne vulgaris: a systematic review and meta-analysis. Dermatologic Therapy. 2020. pubmed.ncbi.nlm.nih.gov

9. Jung JY, Kwon HH, Hong JS, et al. Effect of dietary supplementation with omega-3 fatty acid and gamma-linolenic acid on acne vulgaris: a randomised, double-blind, controlled trial. Acta Dermato-Venereologica. 2014. pubmed.ncbi.nlm.nih.gov

10. Fabbrocini G, Bertona M, Picazo Ó, Pareja-Galeano H, Monfrecola G, Emanuele E. Supplementation with Lactobacillus rhamnosus SP1 normalises skin expression of genes implicated in insulin signalling and improves adult acne. Beneficial Microbes. 2016. pubmed.ncbi.nlm.nih.gov

11. National Center for Complementary and Integrative Health. Tea Tree Oil. National Institutes of Health. 2026. nccih.nih.gov

12. Enshaieh S, Jooya A, Siadat AH, Iraji F. The efficacy of 5% topical tea tree oil gel in mild to moderate acne vulgaris: a randomized, double-blind placebo-controlled study. Indian Journal of Dermatology, Venereology and Leprology. 2007. pubmed.ncbi.nlm.nih.gov

13. Bassett IB, Pannowitz DL, Barnetson RS. A comparative study of tea-tree oil versus benzoylperoxide in the treatment of acne. Medical Journal of Australia. 1990. pubmed.ncbi.nlm.nih.gov

14. Shalita AR, Smith JG, Parish LC, Sofman MS, Chalker DK. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris. International Journal of Dermatology. 1995. pubmed.ncbi.nlm.nih.gov

15. NIH Office of Dietary Supplements. Vitamin A and Carotenoids: Fact Sheet for Health Professionals. National Institutes of Health. 2026. ods.od.nih.gov

This article is for general education and is not medical advice. Talk with your healthcare professional about your own health, especially before starting a new supplement if you are pregnant, nursing, taking medicine, or managing a health condition. Statements about dietary supplements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Reviewed October 2026.