Hyperpigmentation Risk Checker

Does Ascorbic Acid (Vitamin C) Cause Hyperpigmentation?

Evidence-based guidance on ascorbic acid (vitamin c) and its risk of triggering or worsening dark spots, melasma, and post-inflammatory hyperpigmentation.

Risk level
LOW risk

Vitamin C is primarily an antioxidant and melanogenesis inhibitor. It is generally well tolerated and can help brighten existing hyperpigmentation, though acidic or unstable formulas may irritate very sensitive skin.

How it can affect pigmentation

  • Antioxidant protection against UV-induced pigmentation
  • Tyrosinase inhibition (melanogenesis reduction)
  • Low risk of irritation in stable, well-formulated products

Usage advice

Vitamin C is suitable for daytime use under sunscreen. It is one of the lower-risk brightening actives for hyperpigmentation-prone skin.

Recommendations

  • Use in the morning under a broad-spectrum sunscreen.
  • Choose stable derivatives if L-ascorbic acid stings.
  • Always use sun protection if your skin tends to hyperpigment; we recommend a zinc oxide sunscreen.

Sources

  • Topical L-ascorbic acid and photoaging. Pullar JM, et al. Nutrients. 2017;9(8):866. link

Related ingredients

NiacinamideAzelaic Acid

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