Effaclar Duo (+) — Reddit Reviews

• Acne

  Some evidence

  Niacinamide: 6 studies tested it on its own. See all 17 studies→

  On Reddit: Niacinamide calms cystic breakouts overnight for users with long-term stubborn flare-ups who use it twice daily. 17 mentions

  What the studies found

  • Most studies found niacinamide helped acne
  • It often cleared acne about as well as clindamycin when put on the skin
  • Some studies found it helped reduce red, sore spots and pimples
  • Some evidence is still uncertain because some studies found no clear difference

• Hyperpigmentation

  Some evidence

  Niacinamide: 5 studies tested it on its own. See all 24 studies→

  What the studies found

  • All 5 studies that tested it on its own found it helped fade dark spots
  • Niacinamide 5% faded dark spots better than a placebo in studies of facial patches
  • Used with salicylic acid peels, it improved how dark and widespread the patches were more than peels alone
  • A niacinamide mix faded dark spots better than niacinamide alone in one study
  • One study found the fading effect reversed after stopping

• Skin Barrier

  Not proven yet

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

  Niacinamide: 1 study tested it on its own. See all 17 studies→

  What the studies found

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

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