Vitamin C Serum
Reviewed by SerumTruth Editorial · Updated July 2026
A gentle, low-irritation vitamin C for reactive skin, using the stable SAP form with supporting antioxidants. The evidence for the derivative is lighter than for L-ascorbic acid and the level is undisclosed. As an easygoing daily antioxidant at an indie price, it is easy to recommend.
- Evidence21 / 30
Strength of the research behind the key actives
- Sodium Ascorbyl Phosphate: moderate evidence
- Vitamin E (Tocopherol): moderate evidence
- Ferulic Acid: moderate evidence
- Score is the average of the key actives’ evidence grades.
- Potency21 / 25
Dosed at studied levels, not fairy-dusted
- Sodium Ascorbyl Phosphate: dosed at a studied level
- Vitamin E (Tocopherol): dosed at a studied level
- Ferulic Acid: dosed at a studied level
- Potency tracks how strongly the actives are dosed, led by the strongest, not how many there are.
- Delivery & stability12 / 20
Delivery tech + packaging that protects fragile actives
- Delivery: standard
- Packaging: tinted glass
- Air- or light-sensitive actives (Vitamin E (Tocopherol), Ferulic Acid), so packaging is scored.
- Formulation5 / 10
Disclosure, active breadth, and ingredient generation
- 0 of 3 actives disclose a concentration
- 3 key actives (breadth credit caps at 3)
- Current-generation or synergistic: Sodium Ascorbyl Phosphate, Vitamin E (Tocopherol), Ferulic Acid
- Value12 / 15
What a month of use costs vs. the category
- About $20 per month to use
- $34 for 30 ml, used about twice a day (about 0.3 ml each time), so a bottle lasts about 1.7 months
- Band: $6/month or less earns full marks, $60/month or more hits the floor.
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What’s inside
| Active | Disclosed | Dose |
|---|---|---|
| Sodium Ascorbyl Phosphate | n/a | Studied |
| Vitamin E (Tocopherol) | n/a | Studied |
| Ferulic Acid | n/a | Studied |
Built on sodium ascorbyl phosphate, a stable water-soluble vitamin C salt, with vitamin E, ferulic acid, hyaluronic acid and a few botanical extracts, in a frosted-glass dropper. SAP does not sting or oxidise the way L-ascorbic acid does, so the frosted glass is not the liability it would be for the acid form. The percentage is not disclosed, though the vitamin C sits high on the list.
How it’s delivered
Air- and light-sensitive actives (vitamin C, copper peptides) lose potency fast in the wrong packaging, so delivery and the bottle are scored, not just what’s on the label.
The actives, explained
Cosmetic information for general education, not medical advice. The SerumProof score reflects our reading of publicly available research and formulation disclosures. See how scoring works.