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Rsm4.0

Rosemary Oil (topical)

High safety

Evidence

Evidence Score4/10

Studies: 4

Meta-analyses: 0

Dosage & timing

Dosage:

Topical cosmetic only. Rosemary essential oil is diluted (commonly to roughly 1-3% in a carrier oil, or used in a formulated scalp product) and massaged into the scalp once daily or a few times weekly. The trial regimen applied it over 6 months. There is no oral, injectable, or systemic dose — it is not ingested. Always dilute and patch-test. This library does not provide an ingestion protocol.

Best Time:

Any time

Can take on empty stomach

Form:

Diluted essential oil (≈1-3% in a carrier oil) or a formulated scalp product

What you'll notice

ℹ️ Cosmetic, appearance use — not a proven medical treatmentneutral

Throughout

💇 Possible increase in hair density (matched minoxidil 2% once)positive

12-24 weeks

✅ Less scalp itching than minoxidil (in that trial)positive

Throughout

Safety

High safety

Contraindications:

For topical (scalp/skin) use only — not for ingestion
Do not apply undiluted essential oil to the skin or scalp
Known allergy or sensitivity to rosemary or formulation components

Drug Interactions:

Other topical scalp actives (minoxidil, essential oils)

Side Effects:

Scalp irritation or contact dermatitisAllergic sensitisation

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