Compare Products: C15 Super Booster vs C E Ferulic with 15% L-Ascorbic Acid
Ingredient Analysis
Both are vitamin C serums with ascorbic acid and ferulic acid, sharing a similar antioxidant core. Paula's Choice C15 Super Booster has a more complex formula with peptides, ergothioneine, and additional skin-supportive ingredients. SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid is simpler and more minimal, which suits sensitive or reactive skin better.
Paula's Choice C15 Super Booster adds ergothioneine and rice bran extract alongside the vitamin C, E, and ferulic acid trio. SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid sticks to the classic three-antioxidant combination.
Paula's Choice C15 Super Booster includes two peptides (Tridecapeptide-1 and Palmitoyl Tripeptide-5) that may support collagen. SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid contains no peptides.
SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid has fewer ingredients, reducing the chance of a reaction. Paula's Choice C15 Super Booster's longer list raises the odds of encountering a personal irritant.
Paula's Choice C15 Super Booster contains glycerin higher in the list, sodium hyaluronate, and panthenol, suggesting stronger moisturizing support. SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid has these too but later in the list.
Both use ferulic acid and a solvent carrier (ethoxydiglycol) to stabilize ascorbic acid. Neither formula discloses the pH or vitamin C concentration.
- •Neither formula discloses the ascorbic acid concentration. Efficacy depends heavily on it (studies support 10-20%).
- •Neither formula discloses pH. Ascorbic acid requires a pH below 3.5 for optimal skin penetration.
- •Peptide concentrations in Paula's Choice C15 Super Booster are unknown. Peptides listed late in an INCI are often present at low levels.
- •SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid is tentatively identified as SkinCeuticals CE Ferulic based on formula match, but this is unconfirmed.
- •Triethanolamine in SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid can be a sensitizer for some people, though concentration is undisclosed.
- •Ergothioneine in Paula's Choice C15 Super Booster is a promising antioxidant, but large-scale clinical evidence in topical serums is still emerging.
Analysis generated from both INCI lists using Claude. Ingredient order indicates relative concentration; exact percentages are usually undisclosed.
Who It's Designed For
- Those seeking a CE Ferulic serum with added peptide benefits
- Users who want collagen stimulation from both vitamin C and peptides
- People who prefer mixing a vitamin C booster into their existing products
- Prestige skincare shoppers who want the formula at Sephora
- Users comfortable with 15% L-ascorbic acid concentration
- Those who want the research-backed gold standard in vitamin C serums
- Users willing to pay premium pricing for clinical-grade formulation
- People seeking the specific patented CE Ferulic ratio (15%/1%/0.5%)
- Those whose dermatologists recommend medical-grade vitamin C
- Users looking for maximum photoprotection alongside sunscreen
Key Ingredients
15% L-Ascorbic Acid, Ferulic Acid, Tocopherol (Vitamin E), Peptides (Tridecapeptide-1, Palmitoyl Tripeptide-5), Sodium Hyaluronate
15% L-Ascorbic Acid, 1% Alpha Tocopherol (Vitamin E), 0.5% Ferulic Acid, Sodium Hyaluronate, Panthenol
Product Composition
41% similarity (12 ingredients in common)
Only in Paula's Choice (14)▾
Only in SkinCeuticals (3)▾
User Feedback Patterns
Users consistently report visible brightening and improved skin tone within 2-4 weeks. The 15% concentration is effective for most users.
At $55 for 20ml, this is one of the priciest vitamin C serums relative to volume. Users note the small bottle size is a drawback for daily full-face use.
Multiple reviewers report receiving bottles that appear already oxidized (yellow or orange). This is a recurring complaint that the brand has acknowledged.
The booster format is praised for flexibility. Users mix it with moisturizer, sunscreen, or other serums without issues.
The most consistent praise across all platforms. Users report a noticeable glow, brighter skin, and reduced dullness within 2-3 weeks of daily morning use.
The metallic, acidic smell (commonly described as 'hot dog water') is mentioned in nearly every review. Most users tolerate it because of results; some find it unbearable.
Paying $182 for a serum that darkens within weeks is the primary complaint. Some users report receiving already-oxidized bottles from retailers.
Many users buy this specifically because their dermatologist recommended it. The medical-grade positioning provides confidence that cheaper alternatives may not.
View Full Product Details
Comparing something else?
Paste any two ingredient lists, or photograph the labels, and get the same side-by-side breakdown for products we do not carry.
Open the comparison tool