Compare Products: 10% Niacinamide Booster vs C.E.O. 15% Vitamin C Brightening Serum

Who It's Designed For

Paula's Choice
  • Enlarged pores and uneven texture
  • Uneven skin tone and dullness
  • Post-acne marks and discoloration
  • Fine lines and early aging concerns
Sunday Riley
  • Those who want a stable vitamin C that will not oxidize or change color
  • Users who find L-ascorbic acid serums too irritating or acidic
  • People who enjoy a citrus-scented skincare experience
  • Those seeking a vitamin C serum that does not require refrigeration
  • Users looking for a luxurious texture that layers well under makeup

Key Ingredients

Paula's Choice

Niacinamide (10%), Ascorbyl Glucoside (Vitamin C), Licorice Root Extract

Sunday Riley

15% Tetrahexyldecyl Ascorbate (THD Ascorbate), Squalane, Glycolic Acid, Tocopherol (Vitamin E), Saccharide Isomerate

Product Composition

19% similarity (9 ingredients in common)

Shared Ingredients
water (aqua)sodium hyaluronateglycerinsodium citratesodium hydroxideethylhexylglycerintrisodium ethylenediamine disuccinatecaprylyl glycolphenoxyethanol
Only in Paula's Choice (18)
niacinamideacetyl glucosamineascorbyl glucosidebutylene glycolphospholipidsallantoinboerhavia diffusa root extractdipotassium glycyrrhizateglycyrrhiza glabra (licorice) root extractepigallocatechin gallatebeta-glucanpanthenolcarnosinegenisteincitric acidxanthan gumpolysorbate 20pentylene glycol
Only in Sunday Riley (20)
tetrahexyldecyl ascorbatesqualanepolyglyceryl-6 distearatepeg-8 beeswaxlimonenecitrus sinensis (sweet orange) oilcitrus tangerina peel oilglycine soja sterolsppg-12/smdi copolymerhydrogenated polydeceneacetamidoethoxyethanoljojoba esterstocopherolglycolic acidcitrus aurantium dulcis (sweet orange) oilchlorphenesincera albaisosqualanec30 hydrocarbonssaccharide isomerate

User Feedback Patterns

Paula's Choice
Texture takes adjustment

The watery, almost runny texture surprises some users. It can feel like it's not "doing" anything. The brand intends for it to be mixed with other products, which helps with application.

Price comparison to The Ordinary

At roughly 7x the price of The Ordinary's niacinamide serum, value is a common discussion point. Users who prefer it cite the more elegant texture, additional beneficial ingredients, and lack of pilling.

Gradual, cumulative results

Most users report noticing effects (smoother skin, smaller-looking pores, more even tone) after several weeks of consistent use rather than immediate results.

Plays well with other products

The booster format gets consistent praise for layering easily. Users report no issues combining it with retinol, acids, or other actives.

Sunday Riley
Luxurious texture

Users consistently praise the lightweight oily texture that absorbs well and sits beautifully under makeup. The application experience is rated higher than most L-ascorbic acid serums.

Pleasant citrus scent

The orange scent is frequently mentioned as a positive. Users who enjoy scented skincare rate this highly. However, fragrance-sensitive users avoid it.

No oxidation concerns

Users appreciate that the golden color remains consistent throughout the product's life. No anxiety about darkening or wasting product due to oxidation.

Gradual brightening results

Brightening results are described as gradual but visible over 4-8 weeks. Some users expecting the immediate 'glow' of L-ascorbic acid find the results slower.

Which Should You Buy?

Paula's Choice 10% Niacinamide Booster offers great value at a lower price point. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum may be worth the premium if you want 15% Tetrahexyldecyl Ascorbate (THD Ascorbate).

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