Lucent-C Brightening Vitamin C Serum - 15% L-Ascorbic Acid — Reddit Reviews
by Prequel
Updated November 10, 2026
15% L-ascorbic acid brightens dullness and supports antioxidant protection; oxidation risk.
What the community says
A 15% L-ascorbic acid serum with ferulic acid and niacinamide for morning antioxidant support and brighter-looking skin. It suits rosacea-prone users who tolerate direct vitamin C, but sensitive skin may experience irritation and the liquid can arrive oxidized.
What this means for you
What people love
- 15% L-ascorbic acid paired with ferulic acid
- Rosacea users report improvements across redness, texture, acne, and hyperpigmentation
- Lighter liquid texture than many vitamin C serums
Watch out for
- Direct L-ascorbic acid irritates some sensitive skin
- Some bottles reportedly arrive orange from oxidation
Product details
Concerns
Skin Type
Product Traits
Key Ingredients
Where to buy
What the science says
Vitamin C has some evidence for fading dark patches, with most of its 19 studies finding it helped, especially melasma 1. For melasma it often beat a placebo, though some studies found it no better than other dark-spot treatments 1. Vitamin C also has some evidence for anti-aging, with all four direct tests showing smoother, better-looking sun-damaged skin than a placebo 2. Side effects in these studies were usually mild, and skin hydration did not clearly improve beyond a placebo 12.
- Vitamin C for hyperpigmentation Some evidence · 19 studies
- Vitamin C for anti-aging Some evidence · 12 studies
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
How we grade researchFull ingredient list · 14
Prequel Lucent-C Brightening Vitamin C Serum - 15% L-Ascorbic Acid ingredients
Water (Aqua), Propanediol, Ascorbic Acid, Ethoxydiglycol, Isopentyldiol, Ferulic Acid, Ergothioneine, Inulin, Niacinamide, Hydroxyacetophenone, Aminomethyl Propanol, 1,2-Hexanediol, Caprylyl Glycol, Mannitol
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 34 mentions across 22 threads
Prequel Lucent-C Brightening Vitamin C Serum - 15% L-Ascorbic Acid on Reddit, in one place — 22 threads from r/tretinoin, r/koreanskincare and 3 more, summarized.
“this product is very similar and a fraction of the price:”
Positive
“https://prequelskin.com/products/lucent-c-vitamin-c-serum?variant=47506475778360”
Positive
“no adverse reactions at all, to any of the vitamin c’s i’ve used.”
Positive
“used in junction with vitamin c by prequel”
Positive
“yes exactly right! vitamin c in morning before spf and tret at night.”
Positive
“no adverse reactions at all, to any of the vitamin c’s i’ve used.”
Positive
“prequel vitamin c serum.”
Positive
“How do you like the Prequel, Lucent Vitamin C?”
Positive
“I have no issue with using both! but at different times of day of course.”
Positive
“there are great vitamin c serums at the drugstore ex. Timeless and Prequel”
Mentioned
“Prequel Vitamin C”
Positive
“Apply one pump of Prequel Lucent-C vitamin C serum”
Positive
“pat into skin and allow to dry”
Positive
“Sorry this is a finicky sunscreen routine”
Positive
“The prequel vit c was strong for me”
Cautionary
“But some people do well with the Prequel Vitamin C Serum.”
Cautionary
