Niacinamide 20 Serum — Reddit Reviews

• Hyperpigmentation

  Some evidence

  Tranexamic Acid: 9 studies tested it directly. See all 19 studies→

  On Reddit: Fading PIH while preventing new marks from darkening is why users keep reaching for this 20% serum. 7 mentions

  Both ingredients for hyperpigmentation

  Tranexamic Acid · Some evidence

  • Most studies found tranexamic acid helped fade melasma and other dark patches
  • Used on its own, it reduced how dark and widespread melasma patches were
  • Used with laser treatment, it often faded melasma more than laser alone
  • Different ways of using tranexamic acid often worked similarly, though some reviews found oral use or microneedling worked better
  • The most common side effects were stomach upset, skin irritation, and menstrual changes

  Niacinamide · Some evidence

  4 studies tested it directly. See all 17 studies→

  • All 4 studies that tested it directly found it helped fade dark spots or patches
  • It reduced facial dark spots better than a moisturizer without niacinamide
  • Women with chloasma saw darker patches improve more when nicotinamide was added to salicylic acid
  • Studies also found facial skin looked lighter as dark spots faded

  Studied at 2–10% · this product: 20%

• Acne

  Some evidence

  Niacinamide: 6 studies tested it directly. See all 17 studies→

  What the studies found

  • Most studies found niacinamide helped acne
  • It often worked about as well as clindamycin when put on the skin
  • Some studies found it reduced red, sore spots and other pimples
  • Some research found the results were uncertain or showed no clear difference

  Studied at 4–10% · this product: 20%

• Anti-Aging

  Some evidence

  Niacinamide: 2 studies tested it directly. See all 8 studies→

  What the studies found

  • Both studies that tested it directly found it helped with signs of aging
  • It improved how firm and elastic the skin looked
  • It reduced wrinkles, uneven tone, redness, and yellowing
  • It helped skin hold more water and lowered water loss through the skin

  Studied at 2–5% · this product: 20%

• Skin Barrier

  Not proven yet

  Few or mixed studies. This claim isn't established.

  Niacinamide: 1 study tested it directly. See all 17 studies→

  What the studies found

  • The one study that tested it directly found it helped the skin barrier
  • It lowered water loss through the skin
  • It increased the thickness of the outer layer of skin

  Studied at 4–5% · this product: 20%

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