Sunday Riley C.E.O. 15% Vitamin C Brightening Serum Dupes & Cheaper Alternatives
From 16 Reddit threads · Updated October 10, 2026
15% vitamin C brightening serum; layers well and absorbs fast. The catch: too intense for sensitive skin. Here's what Redditors reach for instead.
The short answer
Best Overall AlternativeClose CE Ferulic dupe · $25.16 · 30 ml
Best Cheaper Alternative23% L-ascorbic acid hits hard on brightness · $16.68 · 30 ml vs $80.00 for the original
#1
Best Overall Alternative
- Key actives: Vitamin C 20%, L-Ascorbic Acid 20%
- Size: 30 ml
- Price per ml: $0.84/ml (original $2.71/ml)
The why
One minus
Can sting or burn on sensitive skin
Good forDry Skin
“timeless vitamin c (am)”
— Reddit, r/30PlusSkinCare
The original, at a glance
- Why people love it
- HG-level brightening serum
- Price
- $80.00 · 29.6 ml · $2.71/ml
#2
Best Cheaper Alternative
Vitamin C Suspension 23% + HA Spheres 2%
The Ordinary·Serum
See alternatives23% L-ascorbic acid hits hard on brightness
- Key actives: Vitamin C 23%, HA Spheres 2%
- Size: 30 ml
- Price per ml: $0.56/ml (original $2.71/ml)
The why
A gritty, high-strength vitamin C suspension with hyaluronic acid spheres and squalane, meant for people chasing brighter tone or faded spots. It can deliver quick glow, but the sting, burn, and weird texture rule out plenty of faces.
One minus
Stings, burns, and feels gritty on a lot of skin
Good forDry Skin
#3
Same Active: Vitamin C
The why
An ascorbic-acid essence with vitamin E, dipotassium glycyrrhizinate, and a stabilizing tube for morning spot-fading. It suits people chasing post-acne marks and overall brightening. Oily texture and fragrance can annoy reactive or acne-prone skin.
One minus
Oily feel can linger and pill under other layers
Good forDry Skin
“Vitamin C (specifically for me L-ascorbic acid as a spot treatment aka Melano CC)”
— Reddit, r/AsianBeauty
#4
Best for Brightening
Madagascar Centella Tone Brightening Capsule Ampoule
Skin1004·Serum
See alternativesCentella plus TXA for dark spots
- Size: 50 ml
- Price per ml: $0.22/ml (original $2.71/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
“the skin 1004 tone brightening serum has 4-5% niacinamide”
— Reddit, r/koreanskincare
Other alternatives worth a look
Tranexamic acid + niacinamide for PIH · 103 mentions
Combination SkinDewy Finish
$10 CE Ferulic dupe energy · 57 mentions
Gentler vitamin C for reactive skin · 32 mentions
Fragrance-FreeLightweight
TXA-glutathione brightening cocktail · 25 mentions
GlutathioneTranexamic Acid
10% azelaic acid for redness and breakouts · 713 mentions
Oily SkinCombination Skin
OG 15% L-ascorbic acid antioxidant trio · 150 mentions
Dewy FinishAnti-Aging
Dark-spot hunter — TXA plus niacinamide does the heavy lifting · 143 mentions
Oily SkinCombination Skin
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