Loading…
We use essential cookies (authentication, your saved goals/stack) by default. With your permission we’ll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more about cookies
Head-to-head evidence comparison — which supplement is right for you?
Tea Tree Oil (topical) vs Tretinoin (Retin-A): Tretinoin (Retin-A) has the stronger overall evidence (8 vs 5/10); they're alternatives for clearer skin (acne) — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Tretinoin (Retin-A) wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
Top outcomes
Shared outcomes (1)
Outcomes where both Tea Tree Oil (topical) and Tretinoin (Retin-A) have evidence — compare verdict strength side-by-side.
Topical cosmetic only. Acne trials used a 5% tea tree oil gel applied to affected areas (typically twice daily). Avoid undiluted (100%) application, which is more irritating and sensitizing. Use fresh, properly stored product (oxidised oil may raise allergy risk). A small-area test first can show irritation but does not rule out an allergy. There is no oral or systemic dose — it is not ingested (and tea tree oil is toxic if swallowed). This library does not provide an ingestion protocol.
Any time of day
5% tea tree oil gel (the trial-tested strength)
Prescription topical: a pea-sized amount of 0.025%-0.1% cream or gel applied to clean, dry skin once nightly. Start low-strength and every-other-night to build tolerance. A prescription drug used under clinician direction — not a supplement regimen.
Before bed
Topical cream or gel, 0.025%-0.1% (prescription)
Throughout
8-12 weeks
Weeks
Throughout
12-24 weeks
12-24 weeks
Months
8-12 weeks
A comparative study of tea-tree oil versus benzoylperoxide in the treatment of acne.
Med J Aust (1990) · Rct · n=124
Single-blind RCT in 124 patients comparing 5% tea tree oil gel with 5% benzoyl peroxide lotion for mild-to-moderate acne
The efficacy of 5% topical tea tree oil gel in mild to moderate acne vulgaris: a randomized, double-blind placebo-controlled study.
Indian J Dermatol Venereol Leprol (2007) · Rct · n=60
Randomized double-blind placebo-controlled trial (n=60) of 5% tea tree oil gel vs placebo over 45 days
Tea tree oil gel for mild to moderate acne; a 12 week uncontrolled, open-label phase II pilot study.
Australas J Dermatol (2017) · Pilot · n=18
Open-label, uncontrolled 12-week phase II pilot of a tea tree oil gel and face wash applied twice daily (n=18)
Topical tretinoin improves photoaged skin. A double-blind vehicle-controlled study.
JAMA (1988) · Rct
Randomized, double-blind, vehicle-controlled trial of topical tretinoin for photoaged forearm and facial skin
Tretinoin emollient cream: a new therapy for photodamaged skin.
J Am Acad Dermatol (1992) · Rct
Multicenter double-blind vehicle-controlled trial of tretinoin emollient cream for photodamaged skin
Long-term treatment of photoaged human skin with topical retinoic acid improves epidermal cell atypia and thickens the collagen band in papillary dermis.
J Am Acad Dermatol (2005) · Open label
Long-term topical retinoic acid on photoaged human skin assessed histologically
Tretinoin (Retin-A) has a higher evidence score (8/10 vs 5/10) and wins in 2 of 3 categories.
For clearer skin (acne), Tretinoin (Retin-A) has a higher relevance score (75 vs 62).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
Benzoyl peroxide & retinoids → salicylic/azelaic/niacinamide → naturals, tiered by evidence.
AM/PM order, what to combine vs separate, and why sunscreen always comes first.
The proven core (sunscreen, retinoids, vitamin C) vs the viral hype tier — honestly tiered.
The depigmenter playbook (hydroquinone, azelaic, tranexamic, vitamin C) with sunscreen as the spine.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.