Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) — Reddit Reviews
by Prequel
Updated November 10, 2026
Reddit loves sulfur for redness; studies found reduced acne spots, evidence remains limited.
What the community says
A 2.5% colloidal sulfur cleanser with azelaic acid that Redditors use for rosacea redness and occasional mask duty. Studies found sulfur lotion reduced acne spots, but this cleanser can dry or flare reactive skin.
What this means for you
What people love
- Rosacea Reddit calls it a redness GOAT
- Sulfur plus azelaic acid for pustules and congestion
- Doubles as a brief mask
Watch out for
- Can turn drying, especially with frequent use
- Made some users redder or worsened rosacea
- Sulfa-allergic users reported a reaction
Product details
Use caution
Skin Type
Product Traits
Key Ingredients
Where to buy
What the science says
For acne, the evidence for sulfur is not proven yet, though its one direct study found it reduced acne spots when used alone 1. For rosacea, sulfur also is not proven yet; its one direct study found it helped, and it worked about as well as oral tetracycline when applied to the skin 2. Because these findings rest on few or mixed studies, they point to possibilities rather than firm conclusions 12.
- Sulfur for acne Not proven yet · 5 studies
- Sulfur for rosacea Not proven yet · 4 studies
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
How we grade researchFull ingredient list · 44
Prequel Redness Reform Sulfur Cleanser (2.5% Colloidal Sulfur) ingredients
Water (Aqua), Glycerin, Sodium Lauroyl Isethionate, Magnesium Aluminum Silicate, Decyl Glucoside, Cocamidopropyl Hydroxysultaine, Sulfur, Sodium Lauroyl Methyl Isethionate, Sodium Lauroamphoacetate, Azelaic Acid, Chamomilla Recutita (Matricaria) Flower Water, Osmanthus Fragrans Flower Extract, Quartz, Panthenol, Bisabolol, Aloe Barbadensis Leaf Juice, Centella Asiatica Extract, Polyglycerin-6, Saccharomyces/Zinc Ferment, Apricot Kernel Oil Polyglyceryl-6 Esters, Guaiazulene, Magnolol, Honokiol, Hydrolyzed Garcinia Mangostana Fruit Extract, Lauric Acid, Coconut Acid, Myristic Acid, Acacia Senegal Gum, Capric Acid, Xanthan Gum, Propanediol, Cocamide MIPA, Hydroxyacetophenone, Octenidine HCL, Potassium Sorbate, Sodium Benzoate, Sodium Chloride, Sodium Polyacryloyldimethyl Taurate, Sodium Isethionate, Polyglyceryl-10 Oleate, Sorbitan Palmitate, Cetyl Phosphate, Potassium Hydroxide, Citric Acid
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 80 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
