Product record / Serums, vitamin-c-derivatives
SerumMad Hippie Vitamin C Serum
- $27.99
- retail price
- $0.93
- per mL
- Data source
- The vitamin C here is Sodium Ascorbyl Phosphate (SAP), the #2 ingredient — not pure L-ascorbic acid; the gentle, non-stinging derivative with real acne evidence (INCIDecoder-verified) Specific vitamin C derivative verified as a lead ingredient via INCIDecoder 2026-06-14; ASIN B005IXQLDE price PA-API-verified 2026-06-14.
- Best for
- Acne & breakouts · Brightening & dark spots
- How it feels
- Lightweight, fast-absorbing serum
- Value
- $27.99 for 30 mL · $0.93/mL
Bottom line The gentle SAP serum — sodium ascorbyl phosphate, the vitamin C derivative with real acne evidence, on a non-stinging base for sensitive skin.
Editorial verdict / Social intelligence
The gentle SAP serum — sodium ascorbyl phosphate, the vitamin C derivative with real acne evidence, on a non-stinging base for sensitive skin. 1
- Beauty benefit
- A cult, sensitive-skin vitamin C serum built on sodium ascorbyl phosphate (SAP) at #2 — not pure L-ascorbic acid — rounded out with hydrators and antioxidants. SAP is the stable, non-stinging derivative, and the one with the most acne-specific evidence.
- Does it work
- Yes, and it's the standout pick if your skin is acne-prone, oily, or too sensitive for pure vitamin C. SAP is stable up to around pH 7, so it doesn't sting or brown the way L-ascorbic acid does, and unusually for a vitamin C it has real acne evidence: a randomized trial found a 5% SAP lotion significantly improved acne, and SAP is strongly antimicrobial against acne bacteria and blocks UVA-driven sebum oxidation by up to 40%. As a brightener it also gently evens tone by reducing melanin formation. Honest framing: like all derivatives it's a pro-drug that must convert in the skin and is gentler and more gradual than a strong pure-vitamin-C serum, and the SAP percentage here isn't disclosed. Patch-test; pairs well with niacinamide and SPF. See the verified data below →
Consensus strength
ModerateVitamin C derivatives are well-regarded as the stabler, lower-irritation way to get vitamin C benefits, and specific members have solid evidence (SAP for acne, ascorbyl glucoside for stability + in-skin conversion). The shared caveat is that most are pro-drugs that must convert to ascorbic acid, the clinical evidence for topical vitamin C formulations overall remains limited, and potency varies a lot by which derivative and formula.
01 / The key active
vitamin-c-derivatives
vitamin-c-derivatives is present in the formula; the brand does not disclose the exact concentration.
The vitamin C here is Sodium Ascorbyl Phosphate (SAP), the #2 ingredient — not pure L-ascorbic acid; the gentle, non-stinging derivative with real acne evidence (INCIDecoder-verified). Specific vitamin C derivative verified as a lead ingredient via INCIDecoder 2026-06-14; ASIN B005IXQLDE price PA-API-verified 2026-06-14.
Other products with vitamin-c-derivatives:
02 / The full ingredient list
Every ingredient, in label order
Exactly as printed, each token matched to the EU CosIng register and flagged where a CIR safety assessment exists. Highlighted rows are the key actives.
| # | Ingredient, as printed | CosIng functions | CIR |
|---|---|---|---|
| 01 | Water Deionized | no CosIng function record | — |
| 02 | Sodium Ascorbyl Phosphate |
| ✓ reviewed |
| 03 | Alkyl Benzoate | no CosIng function record | — |
| 04 | Vegetable Glycerin | no CosIng function record | — |
| 05 | Water |
| — |
| 06 | Glycerin |
| ✓ reviewed |
| 07 | Sodium Levulinate |
| ✓ reviewed |
| 08 | Sodium Anisate |
| — |
| 09 | Salvia Sclarea (Clary Sage) | no CosIng function record | — |
| 10 | Citrus Grandis (Grapefruit) |
| ✓ reviewed |
10 ingredients as printed · 10 exact CosIng matches · source: the vitamin c here is sodium ascorbyl phosphate (sap), the #2 ingredient — not pure l-ascorbic acid; the gentle, non-stinging derivative with real acne evidence (incidecoder-verified)
03 / Where to buy
Where to buy Vitamin C Serum
Some links on this page earn us a commission. It never changes our analysis — the methodology is public.
04 / What people say
What buyers actually say
What works
- Common Stabler and gentler than pure vitamin C — friendlier pH, no fast browning, kinder to sensitive skin 17
Several chemically modified derivatives of vitamin C have been developed in an attempt to increase the stability, percutaneous absorption, and overall activity of this ingredient in topical formulations. review
- Common Real vitamin C brightening, not just surface polish — derivatives still reduce melanin formation 2
It decreases melanin formation, thereby reducing pigmentation. review
What to know
What you'd only know from the reviews
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This is the rare vitamin C that's actively good for breakouts. Most 'vitamin C for acne' claims are vague, but SAP specifically has trial evidence for improving acne plus a mechanism — it's antimicrobial against acne bacteria and stops the sebum oxidation that feeds clogged pores. If pure vitamin C stings or your skin is acne-prone, this derivative is the one to reach for. 56
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05 / Questions
Frequently asked
- What's in Mad Hippie Vitamin C Serum?
- Mad Hippie Vitamin C Serum lists 10 ingredients. Key active: vitamin-c-derivatives (concentration undisclosed). Specific vitamin C derivative verified as a lead ingredient via INCIDecoder 2026-06-14; ASIN B005IXQLDE price PA-API-verified 2026-06-14. The full ingredient list, matched to EU CosIng, is on this page.
- Does Mad Hippie Vitamin C Serum work?
- Yes, and it's the standout pick if your skin is acne-prone, oily, or too sensitive for pure vitamin C. SAP is stable up to around pH 7, so it doesn't sting or brown the way L-ascorbic acid does, and unusually for a vitamin C it has real acne evidence: a randomized trial found a 5% SAP lotion significantly improved acne, and SAP is strongly antimicrobial against acne bacteria and blocks UVA-driven sebum oxidation by up to 40%. As a brightener it also gently evens tone by reducing melanin formation. Honest framing: like all derivatives it's a pro-drug that must convert in the skin and is gentler and more gradual than a strong pure-vitamin-C serum, and the SAP percentage here isn't disclosed. Patch-test; pairs well with niacinamide and SPF.
- How much vitamin-c-derivatives is in Mad Hippie Vitamin C Serum?
- Mad Hippie does not publicly disclose the exact concentration. vitamin-c-derivatives appears in the INCI list; the amount is undisclosed. Specific vitamin C derivative verified as a lead ingredient via INCIDecoder 2026-06-14; ASIN B005IXQLDE price PA-API-verified 2026-06-14.
- Where can I buy Mad Hippie Vitamin C Serum?
- $27.99 on Amazon (price recorded as of the date shown). Specific vitamin C derivative verified as a lead ingredient via INCIDecoder 2026-06-14; ASIN B005IXQLDE price PA-API-verified 2026-06-14.