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Head-to-head evidence comparison — which supplement is right for you?
Lactic Acid (topical) and Panthenol (provitamin B5) are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Lactic Acid (topical) and Panthenol (provitamin B5) have evidence — compare verdict strength side-by-side.
Topical cosmetic only. Leave-on lactic acid is used at roughly 5-12% (lower for hydration, higher for exfoliation); professional peels use higher strengths. Apply to clean skin, often at night, building frequency as tolerated, with daily sunscreen. There is no oral or systemic dose — it is not ingested. This library does not provide an ingestion protocol.
evening
Leave-on lotion or serum (≈5-12% lactic acid)
Topical cosmetic only. Panthenol/dexpanthenol is used at roughly 1-5% in moisturizers, soothing creams, and after-procedure ointments, applied to the skin as directed. There is no oral, injectable, or systemic dose in this context — oral vitamin B5 is separate. This library does not provide an ingestion protocol.
any
Leave-on moisturizer or soothing/repair cream containing panthenol (≈1-5%)
Throughout
2-8 weeks
8-22 weeks
Throughout
Throughout
1-4 weeks
1-2 weeks
Throughout
Topical 8% glycolic acid and 8% L-lactic acid creams for the treatment of photodamaged skin. A double-blind vehicle-controlled clinical trial.
Arch Dermatol (1996) · Rct · n=74
22-week double-blind vehicle-controlled trial (n=74): 8% L-lactic acid cream twice daily improved facial photodamage in 71% vs 40% with vehicle (P<.05)
Effect of lactic acid isomers on keratinocyte ceramide synthesis, stratum corneum lipid levels and stratum corneum barrier function.
Arch Dermatol Res (1996) · In vitro
Lactic acid stimulated keratinocyte ceramide biosynthesis in vitro, L-isomer far more potent (300% vs 100%)
Applications of hydroxy acids: classification, mechanisms, and photoactivity.
Clin Cosmet Investig Dermatol (2010) · Review
FDA/NIH review of alpha-, beta-, poly-, and bionic hydroxy acids across photoaging, pigmentation, acne, and ichthyosis
A new topical panthenol-containing emollient: Results from two randomized controlled studies assessing its skin moisturization and barrier restoration potential, and the effect on skin microflora.
J Dermatolog Treat (2017) · Rct · n=23
3-week intra-individual RCT (n=23): a panthenol-containing emollient vs control on SDS-challenged skin
Dexpanthenol enhances skin barrier repair and reduces inflammation after sodium lauryl sulphate-induced irritation.
J Dermatolog Treat (2002) · Rct
In an SLS-irritation model, dexpanthenol cream twice daily accelerated barrier repair significantly more than vehicle or untreated skin
Accelerated wound healing with a dexpanthenol-containing ointment after fractional ablative CO2 laser resurfacing of photo-damaged skin in a randomized prospective clinical trial.
Cutan Ocul Toxicol (2019) · Rct · n=38
Split-area trial (n=38) after fractional CO2 laser: dexpanthenol ointment vs petroleum jelly
Both Lactic Acid (topical) and Panthenol (provitamin B5) are closely matched — the best choice depends on your specific health goals.
Both Lactic Acid (topical) and Panthenol (provitamin B5) score equally (60) for skin hydration & glow.
No known interactions between Lactic Acid (topical) and Panthenol (provitamin B5) have been documented in our database. However, always consult a healthcare provider before combining supplements.