The Vitamin C 23 Serum — Reddit Reviews

• Hyperpigmentation

  Some evidence

  Vitamin C: 9 studies tested it directly. See all 19 studies→

  On Reddit: PIH starts fading within two months with daily use, one commenter reports. 10 mentions

  What the studies found

  • Most studies found vitamin C helped fade dark patches, especially melasma
  • It often worked better than a placebo when put on the skin for melasma
  • Used with microneedling or peels, it often improved dark patches more
  • Some studies found it worked about as well as other dark-spot treatments, not better
  • The side effects were usually mild and brief

  Studied at 3–30% · this product: 23%

• Skin Barrier

  Some evidence

  Panthenol: 5 studies tested it directly. See all 20 studies→

  What the studies found

  • All 5 studies that tested it directly found it helped the skin barrier
  • It helped skin hold more water and lowered water loss through the skin
  • Damaged or irritated skin showed less irritation and better healing signs
  • In people getting radiation, it delayed skin barrier worsening, though a steroid cream helped more

• Anti-Aging

  Some evidence

  Vitamin C: 4 studies tested it directly. See all 12 studies→

  What the studies found

  • All 4 studies that tested it directly found it helped with signs of aging
  • It improved the look and texture of sun-damaged skin more than a placebo
  • It helped smooth wrinkles, roughness, crow’s-feet, and uneven skin tone
  • It did not clearly beat a placebo for how much water the skin held
  • No irritation or sensitivity was reported in one study

  Studied at 5–10% · this product: 23%

• Dehydration

  Some evidence

  Panthenol: 4 studies tested it directly. See all 7 studies→

  What the studies found

  • All 4 studies that tested it directly found it helped dehydrated skin
  • It increased how much water the skin held
  • It helped the skin barrier recover and reduced water loss through the skin
  • It also reduced roughness and redness after irritation
  • It helped protect skin from irritation in healthy skin

Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.