Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) — Reddit Reviews
by Prequel
Updated September 25, 2026
2.5% sulfur cleanser that calms redness and keeps pores clearer; drying.
What the community says
A 2.5% sulfur cleanser with azelaic acid, panthenol, and bisabolol built for rosacea-prone or acne-prone skin that wants a real cleanse without a harsh acne wash. Redditors say it helps redness and congestion, and studies back sulfur for acne. Dry, sensitive faces can find it stripping.
What this means for you
What people love
- 2.5% sulfur with azelaic acid
- Redness and congestion actually improve
- Can short-contact cleanse or mask
Watch out for
- Drying if you use it daily
- Sulfur smell keeps some people to nighttime
- Rosacea flares or sulfa reactions happen
Product details
Concerns
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: Colloidal sulfur and azelaic acid combine for nighttime use to reduce pustules and prevent new breakouts. 6 mentions
What the studies found
- Sulfur helped acne in the study that tested it
- Used on its own, it reduced acne spots
- Used with chloramphenicol, it helped more than sulfur alone
Studied at 2%this product: 2.5%
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 44 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 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
“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 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
“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
