Effaclar Duo (+) — Reddit Reviews
Updated October 14, 2026
Studies find niacinamide may clear acne; Redditors praise fast spot-treatment results.
What the community says
This niacinamide-and-salicylic-acid treatment targets active breakouts and texture. Studies found topical niacinamide can improve acne, and Redditors report stubborn spots shrinking quickly; the catch is frequent dryness, stinging, and formula-related breakouts for some users.
What this means for you
What people love
- Niacinamide and salicylic acid for breakouts and texture
- Strong spot-treatment results on cysts and stubborn pimples
- Community favorite for preventing new breakouts
Watch out for
Product details
Concerns
Use caution
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Acne
Some evidence
Niacinamide: 6 studies tested it on its own. See all 17 studies
On Reddit: For looming breakouts, one commenter uses it twice daily and says the breakout never arrives. 18 mentions
Hyperpigmentation
Some evidence
Niacinamide: 5 studies tested it on its own. See all 20 studies
Anti-Aging
Some evidence
Niacinamide: 3 studies tested it on its own. See all 9 studies
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
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 45 mentions across 22 threads
La Roche-Posay Effaclar Duo (+) on Reddit, in one place — 22 threads from r/SkincareAddiction, r/acne and 2 more, summarized.
“or La Roche Posay Effaclar duo spf30 for daytime.”
Mentioned
“Perhaps you need a day time moisturizer that has some actives in it”
Mentioned
“La Roche Posay Effaclar duo spf30”
Mentioned
“When I was 29, I tried La Roche Posay Effaclar Duo spot treatment (I think that’s what it’s called)? I’m not kidding when I say, within 3 weeks it cleared up.”
Positive
“Even now, if I feel a breakout coming, I’ll use it 2x a day and I won’t get that breakout.”
Positive
“My derm said to use it for cysts and it does help a lot.”
Positive
“I use the effaclar duo but do sandwich method with the b5 balm”
Positive
“effaclar duo”
Positive
“sandwich method”
Positive
“the La Roche Posay Effaclar Duo was the only product that really worked for me”
Cautionary
“Unfortunately, they changed the formula a few years ago and it broke me out.”
Cautionary
“I’ve been looking for a good replacement ever since.”
Cautionary
“had a persistent red spot just like yours for over a year.”
Positive
“the la roche-posay effaclar duo spot treatment finally zapped mine after weeks of consistent use.”
Positive
“stick with it, you'll get rid of it!”
Positive
“La roche posay effaclar duo”
Positive
“The only thing that helps calm down the breakouts that I’ve tried so far is “La Roche Posay Effaclar duo” and I believe it’s because it had 5.5% benzoyl peroxide.”
Positive
“I like the effaclar duo as well but it’s very strong.”
Positive
Dupes & Alternatives
Stridex
Daily Care Acne Pads With Salicylic Acid, Maximum Strength
Better for Acne
3 shared traits
137 mentions
