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Topical OTC. Apply a broad-spectrum SPF 30+ sunscreen daily to sun-exposed skin as the last step of a morning routine, using an adequate amount (about 2 mg/cm² — roughly a nickel-sized dollop for the face, a shot-glass for the body) and reapply every ~2 hours of sun exposure and after swimming/sweating. Mineral (zinc oxide / titanium dioxide) filters are preferred if you're concerned about systemic absorption. There is no oral or systemic dose — it is not ingested. This library does not provide an ingestion protocol.

Morning

Broad-spectrum SPF 30+, applied daily; mineral (zinc oxide/titanium dioxide) if concerned about absorption

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. Patch-test first, and use fresh, properly stored product (oxidized oil raises allergy risk). 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

5% tea tree oil gel (the trial-tested strength)

• For topical (skin) use only — not for ingestion
• Known allergy/sensitivity to a specific UV filter (switch to a mineral filter)

• Other leave-on actives

• For topical (skin) use only — NEVER ingest (tea tree oil is toxic if swallowed)
• Known allergy/sensitivity to tea tree oil or other essential oils
• Undiluted application to skin (higher irritation/sensitization risk)

• Other topical actives (benzoyl peroxide, retinoids, acids)