Evidence-graded guideReviewed October 31, 2026

Herbs and Supplements for Acne and Clear Skin: Ranked by Evidence

The natural options with the best evidence for acne are topical tea tree oil (5% gel matched 5% benzoyl peroxide in a 124-person trial), oral zinc (about a 30–50% reduction in inflammatory lesions across several RCTs) and green tea, both as a 2–3% topical lotion and as a decaffeinated extract by mouth. For general skin quality rather than spots, collagen peptides and omega-3 have the most consistent, if modest, data. Nothing here is as strong as prescription retinoids, antibiotics or spironolactone, and this page says so where it matters.

This guide is for adults and older teens with mild to moderate acne (blackheads, whiteheads and red bumps without deep nodules), and for people who want evidence-based skin support such as hydration, elasticity and less redness. It separates topical from oral options, because a herb that works on the skin surface often does nothing swallowed, and the reverse. Each pick names what the trial measured and in whom.

See a dermatologist or GP instead of experimenting if you have nodules or cysts, scarring, acne that started suddenly in adulthood with irregular periods or excess hair (a PCOS check is warranted), a rash that weeps, blisters or spreads, or anything that could be rosacea rather than acne, since several acne remedies make rosacea worse. Prescription treatment early is the single best way to prevent permanent scarring.

Quick answer

  • Tea tree oil (topical 5%) — matched 5% benzoyl peroxide for lesion count, with less dryness
  • Zinc (oral) — roughly 30–50% fewer inflammatory lesions in multiple RCTs over 8–12 weeks
  • Green tea — 2% topical lotion cut lesions by about 58%; oral decaf extract reduced lesions on the nose and chin
  • Omega-3 — 2 g/day EPA/DHA reduced inflammatory lesions in a 10-week RCT
  • Collagen peptides — small but consistent gains in hydration and elasticity over 8–12 weeks
  • Probiotics — modest acne improvement alongside standard treatment; weaker on their own

The 10 best herbs and supplements for skin and acne

Ranked by the strength of human evidence. Strong = multiple trials or a meta-analysis. Moderate = a few small trials. Preliminary = early or animal data.

  1. Zinc (oral)

    Strong evidence

    Zinc has the most randomised trials of any oral supplement for acne. A 2020 meta-analysis of 14 studies found zinc-treated patients had a significant reduction in inflammatory papule count compared with controls, and that acne patients have lower serum zinc than people without acne. A 2001 trial found 30 mg/day of zinc gluconate for three months produced a clinical response in 31% of patients versus 63% on minocycline, so it is about half as effective as a low-dose antibiotic but without resistance problems.

    Key evidence
    Yee 2020 meta-analysis of 14 studies; Dreno 2001 RCT vs minocycline, 332 patients
    Studied dose
    30 mg/day elemental zinc (as gluconate or picolinate) with food for 8–12 weeks; higher doses cause more nausea without more benefit
    Best for
    Inflammatory acne in people who want an oral option before or instead of antibiotics
    Cautions
    Nausea is the main side effect; take with food. Long-term use above 40 mg/day depletes copper. Separate from tetracycline and quinolone antibiotics, which it binds. Can reduce absorption of some other minerals.
    Full Zinc (oral) profile

  2. Tea tree oil (topical)

    Moderate evidenceMelaleuca alternifolia

    A 1990 single-blind trial in 124 people compared 5% tea tree oil gel with 5% benzoyl peroxide for mild to moderate acne. Both reduced inflamed and non-inflamed lesions; tea tree worked more slowly but caused fewer side effects (44% vs 79% reported dryness, stinging or itching). A 2007 placebo-controlled trial in 60 patients found 5% tea tree gel reduced total lesion count 3.5 times more than placebo over 45 days. Topical only: taken by mouth it is poisonous.

    Key evidence
    Bassett 1990, 124-person trial vs 5% benzoyl peroxide; Enshaieh 2007, 60-person placebo-controlled RCT
    Studied dose
    5% tea tree oil gel or a 5% dilution in a carrier applied to affected skin once or twice daily for 6–12 weeks
    Best for
    Mild to moderate inflammatory acne in people who find benzoyl peroxide too drying
    Cautions
    Never swallow; ingestion causes confusion and ataxia. Patch-test first, as contact allergy is common with oxidised old oil. Avoid around the eyes. Reports of breast tissue growth in prepubertal boys with repeated topical use mean it is best avoided in young children.
    Full Tea tree oil (topical) profile

  3. Green tea (EGCG)

    Moderate evidenceCamellia sinensis

    Green tea works both ways. Topically, a 2% green tea lotion reduced lesion counts by 58% over six weeks in a 20-person study, and 1–5% EGCG solutions cut lesions by up to 89% in a split-face placebo-controlled trial. Orally, a 2016 RCT in 80 women with moderate to severe acne gave 1,500 mg/day of decaffeinated green tea extract for four weeks and found significantly fewer inflammatory lesions on the nose, around the mouth and on the chin, but not on the forehead or cheeks. EGCG reduces sebum production and inflammation.

    Key evidence
    Yoon 2013 split-face RCT of EGCG; Lu 2016 RCT of 1,500 mg/day decaf extract, 80 women
    Studied dose
    Oral: 856 mg EGCG/day (1,500 mg decaffeinated extract) with food for 4–8 weeks. Topical: 2–3% green tea lotion twice daily
    Best for
    Oily, inflammatory acne; also people who want a mild anti-ageing topical
    Cautions
    Concentrated green tea extract, especially on an empty stomach, has caused liver injury in rare cases; take with food, keep EGCG under about 800 mg/day, and stop if you develop dark urine or jaundice. Interacts with some blood-pressure drugs (nadolol) and can add to stimulant effects if not decaffeinated.
    Full Green tea (EGCG) profile

  4. Omega-3 fish oil

    Moderate evidence

    A 10-week randomised placebo-controlled trial in 45 people with mild to moderate acne gave either 2 g/day EPA+DHA or 400 mg gamma-linolenic acid. Both groups had significant reductions in inflammatory and non-inflammatory lesion counts, with no change on placebo, and skin biopsies showed less interleukin-8. A 2024 open study found that 83% of acne patients had low omega-3 status, and raising it over 16 weeks improved lesions. Beyond acne, fish oil has consistent evidence for reducing skin dryness and UV-induced redness.

    Key evidence
    Jung 2014, 45-person RCT, 2 g/day EPA+DHA for 10 weeks
    Studied dose
    2,000 mg/day combined EPA+DHA with meals for 10–16 weeks
    Best for
    Inflammatory acne alongside dry, eczema-prone or sun-sensitive skin
    Cautions
    Adds to the effect of anticoagulants and antiplatelet drugs at this dose; stop a week before surgery. Can cause fishy aftertaste and loose stools. Choose products tested for oxidation and heavy metals.
    Full Omega-3 fish oil profile

  5. Collagen peptides

    Moderate evidence

    Collagen is a skin pick, not an acne pick. A 2021 meta-analysis of 19 RCTs (1,125 participants) found hydrolysed collagen improved skin hydration and elasticity compared with placebo over 8–12 weeks, with reductions in wrinkle scores in several trials. Effects are real but small, many trials were manufacturer-funded, and the comparator was usually a sugar placebo rather than simply eating more protein, which may explain part of the benefit.

    Key evidence
    de Miranda 2021 meta-analysis of 19 RCTs, 1,125 participants
    Studied dose
    2.5–10 g/day of hydrolysed collagen peptides for at least 8–12 weeks
    Best for
    Dryness, fine lines and loss of elasticity; not for breakouts
    Cautions
    Very well tolerated. Marine collagen can trigger fish or shellfish allergy. Some products contain added vitamins or biotin; check labels if you have thyroid or cardiac blood tests coming up.
    Full Collagen peptides profile

  6. Probiotics (Lactobacillus)

    Moderate evidence

    A 2013 trial in 45 women randomised to a probiotic (Lactobacillus and Bifidobacterium blend), minocycline, or both found that the combination gave the greatest reduction in lesion count at 12 weeks and fewer antibiotic side effects, with the probiotic alone roughly matching the antibiotic. A 2022 systematic review of 14 studies found oral and topical probiotics modestly reduced acne lesions, but trials were small and strains varied. Reasonable as an add-on, particularly during antibiotic courses.

    Key evidence
    Jung 2013 RCT of probiotic plus minocycline, 45 women; 2022 systematic review of 14 studies
    Studied dose
    A multi-strain Lactobacillus/Bifidobacterium product delivering 10–20 billion CFU/day for 12 weeks
    Best for
    Acne patients on oral antibiotics, or those with gut symptoms alongside breakouts
    Cautions
    Generally safe. Avoid live probiotics if severely immunocompromised, after recent gut surgery, or with a central line, where rare bloodstream infections have been reported. Bloating in the first week is common and usually settles.
    Full Probiotics (Lactobacillus) profile

  7. Niacinamide (vitamin B3, topical)

    Moderate evidenceNicotinic acid / Niacinamide

    Niacinamide, the amide form of vitamin B3, is one of the best-studied cosmetic actives. A 1995 double-blind trial in 76 patients found 4% niacinamide gel produced improvement in 82% of people with inflammatory acne versus 68% on 1% clindamycin gel, with no antibiotic resistance risk. Separate trials show 2–5% niacinamide reduces sebum, improves the skin barrier and fades post-acne dark marks. Oral niacin is a different compound used for cholesterol; it flushes and does not help skin.

    Key evidence
    Shalita 1995, 76-person double-blind RCT, 4% niacinamide gel vs 1% clindamycin
    Studied dose
    Topical 2–5% niacinamide serum or gel once or twice daily; oral forms are not the studied route for acne
    Best for
    Oily skin, red marks after spots, and people who want a gentle daily active alongside retinoids
    Cautions
    Topical niacinamide is very well tolerated; mild flushing at 10% or above. Do not confuse with oral niacin (nicotinic acid), which at supplement doses causes flushing, liver strain and raised blood sugar and should not be used for skin.
    Full Niacinamide (vitamin B3, topical) profile

  8. Vitamin D

    Preliminary evidenceCholecalciferol (D3)

    Acne patients are more likely to be vitamin D deficient (48.8% vs 22.5% of controls in a 2016 Korean study), and lesion severity tracked with lower levels. In the same study, 39 deficient patients given 1,000 IU/day for two months showed a significant improvement in inflammatory lesions compared with placebo. It is a single small trial, and the benefit appeared only in people who were deficient to begin with.

    Key evidence
    Lim 2016, case-control plus 39-person placebo-controlled pilot, 1,000 IU/day for 8 weeks
    Studied dose
    1,000–2,000 IU/day of vitamin D3 if blood levels are low, for 8–12 weeks, then re-test
    Best for
    Acne patients with a measured deficiency, especially in winter or with darker skin
    Cautions
    Test before taking high doses; sustained intake above 4,000 IU/day can raise calcium. Interacts with thiazide diuretics and digoxin. No evidence it helps acne if levels are already adequate.
    Full Vitamin D profile

  9. DIM (diindolylmethane)

    Preliminary evidence3,3'-Diindolylmethane

    DIM is a metabolite of indole-3-carbinol from cruciferous vegetables that shifts oestrogen metabolism and may mildly block androgen receptors. It is marketed for hormonal acne along the jawline, but the only human data are small uncontrolled reports and case series; no randomised trial has tested DIM on acne. It is here because the hormonal rationale is plausible and the question is common, not because the evidence is good.

    Key evidence
    No RCT in acne; mechanistic and case-report data only
    Studied dose
    100–200 mg/day of DIM with food, typically trialled for 3 months
    Best for
    Adult women with cyclical jawline breakouts who are not candidates for spironolactone and accept weak evidence
    Cautions
    Alters oestrogen metabolism; avoid in pregnancy, breastfeeding, hormone-sensitive cancers and with hormonal contraception or HRT without medical advice. Harmless but alarming orange-tinged urine is common. Headache and nausea at higher doses.
    Full DIM (diindolylmethane) profile

  10. Aloe vera (topical)

    Preliminary evidenceAloe barbadensis miller

    Aloe gel on its own has little acne evidence, but a 2014 randomised trial in 60 people found that adding 50% aloe vera gel to topical tretinoin reduced inflammatory and non-inflammatory lesions significantly more than tretinoin alone over 8 weeks, with less redness and peeling. Separate trials support it for minor burns and wound healing. Best understood as a soother that makes stronger treatments more tolerable.

    Key evidence
    Hajheydari 2014, 60-person RCT of aloe plus tretinoin vs tretinoin alone
    Studied dose
    Pure aloe vera gel (99%+, no added alcohol or fragrance) applied after active treatments, once or twice daily
    Best for
    Irritation from retinoids or benzoyl peroxide, and inflamed, sunburnt skin
    Cautions
    Topical aloe is safe for most people; contact allergy is rare but possible. Oral aloe latex is a strong laxative that depletes potassium and interacts with diuretics, digoxin and diabetes drugs; do not take aloe by mouth for skin.
    Full Aloe vera (topical) profile

How to choose

  • If you have red, inflamed spots: start with topical tea tree or niacinamide plus oral zinc. Give it 8–12 weeks and photograph in the same light at the start.
  • If spots are mainly blackheads and clogged pores: topical green tea or niacinamide helps with oil, but a retinoid (over-the-counter adapalene 0.1%) outperforms every herb for this type.
  • If breakouts cluster on the jawline and flare before periods: see a doctor about spironolactone or the pill, which have far better data than DIM; add zinc and omega-3 as support.
  • If your main goal is skin quality (dryness, fine lines, dullness): collagen peptides, omega-3 and daily sunscreen matter; acne-targeted picks will not help and some will dry you out.
  • If you are already on antibiotics for acne: a Lactobacillus probiotic reduced side effects and improved results in the trial that tested the combination.
  • If your face flushes, stings or has visible vessels rather than true pimples: suspect rosacea, skip tea tree and acids, and get a diagnosis before treating.

What to skip

Lemon juice and apple cider vinegar on the skin

Both are acidic enough to cause chemical burns and lemon is phototoxic. There are no trials, and the pH disruption makes the barrier worse.

High-dose vitamin A supplements for acne

Oral isotretinoin works because it is a prescription retinoid at monitored doses. Ordinary vitamin A pills do not do the same thing and at high intakes cause liver damage, bone loss and birth defects.

Toothpaste or baking soda spot treatments

Both irritate and can leave dark marks. Benzoyl peroxide gel costs about the same and has decades of trials.

Oral tea tree oil or 'internal cleanses' for skin

Tea tree oil is toxic when swallowed and acne is not caused by toxins. Colon cleanses and detox teas have no skin evidence and can cause dehydration and electrolyte loss.

Safety and when to see a clinician

  • See a clinician if you have nodules or cysts, scarring, acne that began suddenly as an adult with irregular periods or new facial hair, or a rash that blisters, weeps or spreads. Early prescription treatment prevents permanent scars; supplements do not.
  • Topical only means topical: tea tree oil and essential oils are poisonous if swallowed, and oral aloe latex is a laxative. Keep all essential oils away from children.
  • Green tea extract in concentrated form has caused liver injury in rare cases. Take with food, keep EGCG under about 800 mg/day, and stop if you notice dark urine, pale stools or yellowing of the eyes.
  • Zinc above 40 mg/day long term depletes copper; separate it from tetracycline and quinolone antibiotics by 2–4 hours. Omega-3 at 2 g/day adds to blood-thinning drugs; stop a week before surgery.
  • DIM, saw palmetto and other hormone-modulating supplements are not for pregnancy, breastfeeding or hormone-sensitive cancers, and can interfere with hormonal contraception. Spironolactone and isotretinoin are prescription drugs with their own monitoring requirements.
  • Patch-test every new topical on the inner forearm for 48 hours. Contact allergy to tea tree, fragrance and plant extracts is common and looks like worse acne.

What matters as much as any herb

  • Diet: high-glycaemic-load diets and, in some people, skim milk and whey protein worsen acne in randomised and cohort studies. A 12-week low-GI diet reduced lesion counts by about 23% more than control in one trial.
  • Retinoids: over-the-counter adapalene 0.1% gel is the strongest non-prescription acne treatment available and should be the base of most routines; herbs work alongside it, not instead.
  • Sunscreen: daily SPF 30+ does more for long-term skin texture, pigmentation and wrinkles than any oral supplement, and prevents post-acne marks from darkening.
  • Sleep and stress: cortisol raises sebum production, and students in exam periods have measurably worse acne. It is not the cause, but it is a lever.
  • Pillowcases, phones and hair products: fragranced hair oils and comedogenic sunscreens on the forehead and temples are a common, easily fixed trigger.

Frequently asked questions

What is the best herb for acne?

Tea tree oil applied as a 5% gel has the best trial record for a herbal topical; it matched 5% benzoyl peroxide in a 124-person trial with fewer side effects. For something taken by mouth, zinc at 30 mg/day has more randomised trials than any herb.

Does zinc help acne?

Yes, modestly. A 2020 meta-analysis of 14 studies found significantly fewer inflammatory lesions with zinc, and a large trial found 30 mg/day was about half as effective as the antibiotic minocycline. Expect improvement, not clearance, over 8–12 weeks.

Can supplements clear acne without medication?

For mild acne, zinc plus a topical such as tea tree or niacinamide can be enough. For moderate acne with lots of inflamed spots, trials show prescription retinoids, antibiotics and spironolactone work better and faster, and herbs are best used alongside them to reduce side effects.

Is tea tree oil safe to put on your face?

Diluted to 5% or less, yes for most people, though contact allergy is common with oxidised oil, so patch-test first. Never use it neat near the eyes and never swallow it. It has not been tested in rosacea and may make flushing worse.

Which vitamins are good for skin?

Vitamin D if you are deficient, topical niacinamide (B3) for oil and redness, and vitamin C topically for pigmentation. Oral collagen and omega-3 have modest data for hydration and elasticity. There is no evidence that multivitamins improve skin in people who eat adequately.

Does green tea help acne?

Both topical and oral forms have small positive trials. A 2% green tea lotion cut lesions by 58% in six weeks, and 1,500 mg/day of decaffeinated extract reduced lesions on the nose and chin in an 80-woman RCT. Take the extract with food to protect the liver.

Do probiotics help skin?

The best trial found a Lactobacillus/Bifidobacterium blend roughly matched minocycline alone and worked best combined with it. The effect on its own is modest and strain-dependent; it is most useful as an add-on during antibiotic treatment.

References

  1. 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)View source
  2. Enshaieh S, et al.. 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)View source
  3. Yee BE, et al.. Serum zinc levels and efficacy of zinc treatment in acne vulgaris: a systematic review and meta-analysis. Dermatologic Therapy (2020)View source
  4. Dreno B, et al.. Multicenter randomized comparative double-blind controlled clinical trial of the safety and efficacy of zinc gluconate versus minocycline hydrochloride in the treatment of inflammatory acne vulgaris. Dermatology (2001)View source
  5. Lu PH, Hsu CH. Effect of decaffeinated green tea extract on acne vulgaris in women: a randomized, double-blind, placebo-controlled trial. Complementary Therapies in Medicine (2016)View source
  6. Jung JY, 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)View source
  7. de Miranda RB, Weimer P, Rossi RC. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. International Journal of Dermatology (2021)View source
  8. Jung GW, et al.. Prospective, randomized, open-label trial comparing the safety, efficacy, and tolerability of an acne treatment regimen with and without a probiotic supplement and minocycline in subjects with mild to moderate acne. Journal of Cutaneous Medicine and Surgery (2013)View source
  9. Shalita AR, et al.. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris. International Journal of Dermatology (1995)View source
  10. Lim SK, et al.. Comparison of vitamin D levels in patients with and without acne: a case-control study combined with a randomized controlled trial. PLoS One (2016)View source
  11. Hajheydari Z, et al.. Effect of Aloe vera topical gel combined with tretinoin in treatment of mild and moderate acne vulgaris: a randomized, double-blind, prospective trial. Journal of Dermatological Treatment (2014)View source
  12. Zinc: Fact Sheet for Health Professionals. NIH Office of Dietary SupplementsView source

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This guide is educational and is not medical advice. Herbs and supplements can interact with prescription medicines and are not regulated like drugs. Talk with a clinician or pharmacist before starting anything new, especially if you are pregnant, breastfeeding, have a chronic condition, or take medication.