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Head-to-head evidence comparison — which supplement is right for you?
Sunscreen (SPF) wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Topical cosmetic only. Centella/cica is used in serums, creams, and balms (often standardized to madecassoside/asiaticoside) applied to clean skin once or twice daily, popular for soothing and post-procedure care. There is no oral, injectable, or systemic dose in this cosmetic context — oral gotu kola is separate. This library does not provide an ingestion protocol.
any
Leave-on serum, cream, or balm standardized to centella triterpenes
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
Throughout
2-8 weeks
1-4 weeks
12-24 weeks
Throughout
Ongoing (years)
Ongoing
Throughout
Clinical, biometric and structural evaluation of the long-term effects of a topical treatment with ascorbic acid and madecassoside in photoaged human skin.
Exp Dermatol (2008) · Rct · n=20
Randomized double-blind study (n=20) of topical 5% vitamin C + 0.1% madecassoside on photoaged skin over 6 months
Randomized-Controlled Trial Comparing Safety and Efficacy of Repairing Balm vs Topical Antimicrobial for Post-Procedural Wounds.
J Drugs Dermatol (2025) · Rct · n=60
RCT (n=60) after cryotherapy for actinic keratoses: a non-prescription balm with panthenol, madecassoside, and metal salts vs a topical antibiotic
A Systematic Review of the Effect of Centella asiatica on Wound Healing.
Int J Environ Res Public Health (2022) · Systematic review
PRISMA systematic review identified only four clinical trials meeting inclusion criteria — a small human evidence base
Sunscreen and prevention of skin aging: a randomized trial.
Ann Intern Med (2013) · Rct · n=903
Randomized community trial (n=903): the daily sunscreen group showed no detectable increase in photoaging (skin microtopography) after 4.5 years
Molecular mechanisms of photoaging and its prevention by retinoic acid: ultraviolet irradiation induces MAP kinase signal transduction cascades that induce Ap-1-regulated matrix metalloproteinases that degrade human skin in vivo.
J Investig Dermatol Symp Proc (1998) · Review
Mechanistic model: UV activates MAP-kinase pathways and AP-1, which upregulate matrix metalloproteinases (MMPs)
Daily Use of a Facial Broad Spectrum Sunscreen Over One-Year Significantly Improves Clinical Evaluation of Photoaging.
Dermatol Surg (2016) · Open label · n=32
Single-arm prospective study (n=32): broad-spectrum SPF 30 applied daily to the face for 52 weeks
Sunscreen (SPF) has a higher evidence score (9/10 vs 5/10) and wins in 1 of 3 categories.
For reduce wrinkles & fine lines, Sunscreen (SPF) has a higher relevance score (90 vs 45).
No known interactions between Centella Asiatica (Cica) and Sunscreen (SPF) have been documented in our database. However, always consult a healthcare provider before combining supplements.