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Shop Klairs Freshly Juiced Vitamin C Serum
Serum
Klairs

Freshly Juiced Vitamin C Serum

~$16.67· 35ml
Dark spotsRadiance

What it's good for

Key actives from our research database. Click any to read the full evidence dossier.

  • Vitamin CStrong evidenceFull 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

  • NiacinamideStrong evidenceFull dossier ↗

    A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.

    Good for: Brightening, Barrier repair, Anti-inflammatory

New to this? Patch test on your inner arm for 24 to 48 hours before applying to your face. If you have sensitive skin or rosacea, start 2 to 3 times per week and build up slowly.

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.

Vitamin CStrong evidence15 citations

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.

2025Meta-analysis (positive)PMID:41152208View source ↗

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

2017Mechanism onlyPMID:28805671View source ↗

Lee JH et al., Effects of VitabridC12 on Skin Inflammation, Annals of Dermatology 2017

2017Mechanism onlyPMID:28966510View source ↗
NiacinamideStrong evidence10 citations

A multitasker that calms redness, evens out skin tone, and helps oily skin balance out. One of the safest do-a-little-of-everything ingredients.

Moro F et al., Skin Cancer Prevention and Antiaging: Role of Nicotinamide, International Journal of Molecular Sciences 2026

2026Mechanism onlyPMID:42278444View source ↗

Passeron T et al., An Investigator-Blinded, Randomized Trial of a Broad-Spectrum Sunscreen Containing Sclareolide and Niacinamide, Dermatology and Therapy (Heidelberg) 2026

2026Positive (efficacy)PMID:41240206View source ↗

Vergilio MM et al., Topical Formulation with Niacinamide Combined with 5 MHz Ultrasound for Improving Skin Ageing, Current Medicinal Chemistry 2025

2025Positive (efficacy)PMID:39171587View source ↗

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.

Full ingredient list

Everything on the package label, not just the tracked actives above.

Drying alcohol freeSulfates freeParabens freeSilicones free
  • Contains fragrance: Lavandula Angustifolia (Lavender) OilWorth knowing if you have sensitive or reactive skin.
+Show all 45 ingredients

Listed in the order printed on the package. By regulation, ingredients at 1% or higher are listed in descending order by concentration, so the first entry is the largest part of the formula.

  1. Water
  2. Propylene Glycol
  3. Ascorbic Acid 5.0%
  4. Hydroxyethylcellulose
  5. Centella Asiatica Extract
  6. Citrus Junos Fruit Extract
  7. Illicium Verum (Anise) Fruit Extract
  8. Citrus Paradisi (Grapefruit) Fruit Extract
  9. Nelumbium Speciosum Flower Extract
  10. Paeonia Suffruticosa Root Extract
  11. Scutellaria Baicalensis Root Extract
  12. Polysorbate 60
  13. Brassica Oleracea Italica (Broccoli) Extract
  14. Chaenomeles Sinensis Fruit Extract
  15. Orange Oil (Brazil)
  16. Sodium Acrylate/​Sodium Acryloyldimethyl Taurate Copolymer
  17. Disodium EDTA
  18. Lavandula Angustifolia (Lavender) Oil
  19. Camellia Sinensis Callus Culture Extract
  20. Larix Europaea Wood Extract
  21. Chrysanthellum Indicum Extract
  22. Rheum Palmatum Root Extract
  23. Asarum Sieboldi Root Extract
  24. Quercus Mongolia Leaf Extract
  25. Persicaria Hydropiper Extract
  26. Corydalis Turtschaninovii Root Extract
  27. Coptis Chinensis Root Extract
  28. Magnolia Obovata Bark Extract
  29. Lysine Hcl
  30. Proline
  31. Sodium Ascorbyl Phosphate
  32. Acetyl Methionine
  33. Theanine
  34. Lecithin
  35. Acetyl Glutamine
  36. Sh-Oligopeptide-1
  37. Sh-Oligopeptide-2
  38. Sh-Polypeptide-1
  39. Sh-Polypeptide-9
  40. Sh-Polypeptide-11
  41. Bacillus/​Soybean/​Folic Acid Ferment Extract
  42. Sodium Hyaluronate
  43. Caprylyl Glycol
  44. Butylene Glycol
  45. 1,2-Hexanediol

Layering conflicts

Ingredients in this product that can react with common actives. Avoid stacking unless noted.

  • Benzoyl peroxide breaks down vitamin C, making both less effective. Use one in the morning and the other at night.

  • 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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Not medical advice. GlowPal is educational. Patch-test new products and talk to a qualified healthcare professional before changing your routine, especially if you're pregnant, nursing, or have a diagnosed skin condition. See our terms.