Regimen Lab Vitamin X Antioxidant Serum Dupes & Cheaper Alternatives
From 21 Reddit threads · Updated October 8, 2026
15% L-ascorbic acid plus mega-antioxidants for glow and dark spots; greasy on some. The catch: very thick and greasy for some people. Here's what Redditors reach for instead.
The short answer
Best Overall AlternativeClose CE Ferulic dupe · $25.16 · 30 ml
Best for HyperpigmentationOG 15% L-ascorbic acid antioxidant trio · $70.99 · 15 ml
Best for BrighteningCentella plus TXA for dark spots · $10.99 · 50 ml
#1
Best Overall Alternative
- Size: 30 ml
The why
One minus
Can sting or burn on sensitive skin
Good forDry Skin
Both recommended for Hyperpigmentation; discussed alongside Regimen Lab Vitamin X Antioxidant Serum in 13 threads.
“It completely erased my sun spots in three months.”
— Reddit, r/AsianBeauty
The original, at a glance
- Why people love it
- 15% L-ascorbic acid with a full antioxidant stack
#2
Best for Hyperpigmentation
- Size: 15 ml
The why
A 15% L-ascorbic acid serum built around vitamin E and ferulic acid, with panthenol and sodium hyaluronate in the mix. Best for people chasing brightening, photoaging support, and dark-spot fading. The sting, orange oxidation, and price are the dealbreakers.
One minus
Steep price for a 30 mL bottle
Good forSensitive Skin
Both recommended for Hyperpigmentation; discussed alongside Regimen Lab Vitamin X Antioxidant Serum in 8 threads.
“The skinceuticals CE ferulic made my hyperpigmentation less visible and my skin overall brighter as well.”
— Reddit, r/scacjdiscussion
#3
Best for Brightening
Madagascar Centella Tone Brightening Capsule Ampoule
Skin1004·Serum
See alternativesCentella plus TXA for dark spots
- Size: 50 ml
The why
A brightening ampoule built around niacinamide, tranexamic acid, and centella, with a lot of people using it for dark spots or general glow. Reddit’s split: some see slow, subtle payoff, while others get stickiness or breakouts.
One minus
Sticky finish in humid weather
Good forSensitive Skin
Both recommended for Hyperpigmentation.
“it contains Niacinamide and Tranexamic acid plus its formulated with Centella which is very gentle.”
— Reddit, r/koreanskincare
Other alternatives worth a look
10% azelaic acid for redness and breakouts · 713 mentions
Oily SkinSensitive Skin
Tranexamic acid + niacinamide for PIH · 103 mentions
Sensitive SkinDullness
Alpha-arbutin plus niacinamide for tone-correcting · 67 mentions
Dry SkinSensitive Skin
5% niacinamide does the heavy lifting · 50 mentions
Gel Texture
Gentler vitamin C for reactive skin · 32 mentions
Sensitive SkinFragrance-Free
Dark-spot hunter — TXA plus niacinamide does the heavy lifting · 143 mentions
Oily SkinDehydration
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