Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) — Reddit Reviews
by Prequel
Updated September 19, 2026
Sulfur cleanser for rosacea redness and clogged pores; surprisingly gentle.
What the community says
A sulfur-and-azelaic-acid cleanser for people chasing calmer redness, less congestion, and fewer pustules. Redditors mostly use it for rosacea and acne, and studies on sulfur are mixed rather than miraculous. Dry, sulfa-reactive, or smell-sensitive folks report the roughest time.
What this means for you
What people love
- Sulfur + azelaic acid combo
- Redness and congestion actually drop
- No strong stink for sulfur
Watch out for
Product details
Where to buy
What the science says vs. what Reddit says
What the science says
Sulfur
Not proven yet for acneFew or mixed studies. This claim isn't established.
- Sulfur showed mixed results for acne in the studies available
- 2 studies back this, both tested sulfur used together with other ingredients
- One study found good to excellent clearing with benzoyl peroxide
- Another study found a sulfur combination worked less well than retinoic acid
- Few side effects were reported in one study
Studied at 2%this product: 2.5%
See 5 studiesWhat Reddit says
The why
Sulfur content targets pustules while used nightly, mixing with other rosacea and acne treatments without burning.
“I use the Prequel sulfur cleanser every other day”
6 mentions for acne
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 27 mentions across 24 threads
Prequel Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) on Reddit, in one place — 24 threads from r/SkincareAddiction, r/Rosacea and 2 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
“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
“I am currently waiting for the sulfur cleanser to come back in stock.”
Positive
“I want the sulfur cleanser so badly.”
Positive
“the sulfur cleanser is the way the truth the life. i will rebuy when it comes back in stock. i am oily w/ rosacea and it is the best”
Positive
“I bought the prequel one but haven’t tried it yet - my derm recommended that one.”
Mentioned
“Just bought the one from Prequel but haven’t received yet”
Mentioned
“I can’t use most Prequel products because they use a lot of ingredients that break me out / flare my rosacea”
Mentioned
“Prequel sulfur cleanser is GOAT for redness”
Positive
“I have had GREAT success with metronidazole gel and a sulphur face wash that I use once a day.”
Positive
“I use sulfur for rosacea”
Positive
