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Side-by-side comparison of 1 supplements

Cft4.0

Caffeine (topical)

High safety

Evidence

Evidence Score4/10

Studies: 6

Meta-analyses: 0

Dosage & timing

Dosage:

Topical cosmetic only. Used in scalp solutions/shampoos (the hair trial used a 0.2% caffeine leave-on solution; caffeine shampoos are typically left on briefly then rinsed) and in skin/eye/cellulite creams (often ~3% caffeine). Apply per the product, consistently, for hair benefit. There is no oral or systemic dose in this cosmetic context. This library does not provide an ingestion protocol.

Best Time:

Any time

Can take on empty stomach

Form:

0.2% caffeine scalp solution (hair) or a caffeine shampoo; ~3% creams for skin/cellulite (weaker evidence)

What you'll notice

ℹ️ Plausible, well-tolerated — but modest evidenceneutral

Throughout

💇 May support hair growth / reduce sheddingpositive

16-24 weeks

✅ Well toleratedpositive

Throughout

Safety

High safety

Contraindications:

For topical (skin/scalp) use only — not for ingestion in this context
Known allergy/sensitivity to the formulation
Application to broken or irritated skin until healed

Drug Interactions:

Other topical scalp/skin actives (e.g. minoxidil)

Side Effects:

Mild scalp/skin irritation

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