Collagen Bank 15% Vitamin C Serum
What it's good for
Key actives from our research database. Click any to read the full evidence dossier.
Brightens dull skin and helps fade dark spots. Also defends against everyday UV and pollution damage when worn under sunscreen.
Good for: Brightening, Antioxidant
The mildest exfoliating acid. Refines texture and hydrates at the same time, and it's sensitive-skin friendly.
Good for: Exfoliating, Hydrating
Evidence behind the ingredients
Real citations from our research database, one per tracked active in this product. Click any ingredient name to read its full evidence dossier.
Brightens dull skin and helps fade dark spots. Also defends against everyday UV and pollution damage when worn under sunscreen.
Krutmann J et al. PINGing Sunshine: A Review of the Evidence for Adding Non-Filtering Photoprotective Ingredients to Sunscreens. Photodermatol Photoimmunol Photomed. 2025;41(6). — Review of Photoprotective INGredients (PINGs); L-ascorbic acid (vitamin C) identified as a top-ranked PING demonstrating efficacy across multiple photodamage endpoints.
Pullar JM et al., The roles of vitamin C in skin health, Nutrients 2017;9(8):866 — concluded topical efficacy "poorly understood"; supports dietary vitamin C
Lee JH et al., Effects of VitabridC12 on Skin Inflammation, Annals of Dermatology 2017
The mildest exfoliating acid. Refines texture and hydrates at the same time, and it's sensitive-skin friendly.
Peng Y et al., Comparison of Efficacy and Willingness to a 5% Gluconolactone-Based Topical Serum and Intense Pulsed Light in Mild Erythema of Rosacea: A Paired Control Study, Journal of Cosmetic Dermatology 2025;24(3):e70025 — 5% gluconolactone serum improved erythema and moisturization over 30 days
Kantikosum K et al., The efficacy of glycolic acid, salicylic acid, gluconolactone, and licochalcone A combined with 0.1% adapalene vs adapalene monotherapy in mild-to-moderate acne vulgaris, Clinical Cosmetic and Investigational Dermatology 2019;12:151-161 — gluconolactone cosmeceutical added benefit on top of adapalene without hindering treatment
Edison BL et al., A polyhydroxy acid skin care regimen provides antiaging effects comparable to an alpha-hydroxyacid regimen, Cutis 2004;73(2 Suppl):14-17 — 12-week PHA regimen matched AHA antiaging benefits with significantly less stinging/burning
Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.
Layering conflicts
Ingredients in this product that can react with common actives. Avoid stacking unless noted.
- Benzoyl Peroxidemedium
Benzoyl peroxide breaks down vitamin C, making both less effective. Use one in the morning and the other at night.
- Retinollow
Vitamin C and retinol work best at different pH levels. Use vitamin C in the morning and retinol at night.
Similar comparisons
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