Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) — Reddit Reviews
by Prequel
Updated October 22, 2026
Reddit’s rosacea favorite; studies found sulfur reduced acne spots in one trial.
What the community says
A 2.5% sulfur-and-azelaic-acid cleanser for congestion and rosacea-related redness, left on 3–5 minutes. Reddit users with oily, rosacea-prone skin report calmer skin, but sensitive or dry faces may find it drying; one study found sulfur reduced acne spots.
What this means for you
What people love
- Sulfur plus azelaic acid in one cleanser
- Rosacea users report calmer redness and fewer pustules
- Less harsh than other sulfur washes
Watch out for
Product details
Use caution
Skin Type
Product Traits
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Acne
Not proven yet
Few or mixed studies. This claim isn't established.
Sulfur: 1 study tested it on its own. See all 5 studies
On Reddit: Pustules stay at bay for some users who use this sulfur cleanser every other night. 9 mentions
Rosacea
Not proven yet
Few or mixed studies. This claim isn't established.
Sulfur: 1 study tested it on its own. See all 4 studies
On Reddit: Pustules stay at bay with this sulfur wash; one user uses it every other night. 15 mentions
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 62 mentions across 30 threads
Prequel Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) on Reddit, in one place — 30 threads from r/SkincareAddiction, r/Rosacea and 3 more, summarized.
“Prequel just came out with a sulfur cleanser that is amazing”
Mentioned
“If you are looking for acne control and trying not to burn your face off, try these!”
Mentioned
“Sulfur is the unsung hero of skincare.”
Mentioned
“I’ve been doing sulfur cleanser and 15% azelaic acid for like four months now with no progress 😭”
Cautionary
“sulfur cleanser”
Cautionary
“with no progress”
Cautionary
“Prequel’s new sulfur cleanser is also helping my skin SO MUCH.”
Positive
“Not sponcon I’m just a regular person.”
Positive
“It’s gentle!”
Positive
“just picked up the sulfur cleanser.”
Cautionary
“I've tried the sulfur cleasner and liked it initially but then realized I was giving myself a reaction because I'm allergic to sulfa products.”
Cautionary
“I thought about ordering the sulfur cleanser but the prescription cream I’m about to start has azelaic acid in it”
Cautionary
“The sulfur wash from Prequel is so gentle.”
Positive
“I’ve had a similar experience with other ones being too harsh but I took the chance and my texture is clearing up”
Positive
“The sulfur wash from Prequel”
Positive
“The prequel SA cleanser can be a more gentle way to keep salicylic acid in your routine.”
Mentioned
“The prequel cleanser uses a time release encapsulated salicylic acid”
Mentioned
“more gentle and more effective than unencapsulated SA”
Mentioned
