HYPHENSerums

10% Vitamin C Serum with Ferulic Acid

An intelligently designed antioxidant serum with a confirmed 10% stable Vitamin C, but the unlabelled 'Vegetable Oil' is a material transparency gap and Ethoxydiglycol's penetration-enhancing role is not disclosed.

10% Vitamin C Serum with Ferulic Acid
69
Fair
Best for
  • Dull or uneven skin tone
Avoid if
  • Your skin is highly reactive to antioxidant formulas

Rs. 799 - Rs. 1,099 • Analysed 10 June 2026

India Context

A multi-form Vitamin C approach is smart for India's climate: the ethylated 3-O-Ethyl Ascorbic Acid is more stable than pure L-ascorbic acid in the heat and humidity, while the lipophilic Ascorbyl Tetraisopalmitate penetrates the sebum-rich skin surface common in Indian skin types. The Ferulic Acid combination doubles UV photoprotection, important in a country where daily SPF application is underutilised. Use at night if not pairing with a high-SPF sunscreen. The Ethoxydiglycol penetration booster means this serum should not be layered under formulas containing potential sensitisers on sensitive skin types.

This is a web evidence review, not a Clean Sheet certification. We checked the ingredient list, publicly available test reports, marketing claims, and formula logic using only public information available at the time of review.

At a glance

Fragrance free
Alcohol free
Paraben free

What was checked

Each claim checked against publicly available evidence: published test reports, the ingredient list, and regulatory data.

10% Vitamin CVerified

Brand explicitly states 10% 3-O-Ethyl Ascorbic Acid on label.

Published evidence
Clinically testedNeeds context

Claim appears on product but no clinical study is linked or accessible.

Brand claim
BrighteningNeeds context

Vitamin C mechanism is established but no formula-level study published.

Brand claim
Ferulic Acid doubles efficacyNeeds context

The synergy mechanism is scientifically established but Ferulic Acid concentration in this formula is not disclosed.

Brand claim
Verified: confirmed from public evidenceSupported: consistent with available evidenceNeeds context: relevant for some usersNot verified: could not be confirmed

Score breakdown

Needs proof

Public Evidence Score across 5 pillars. Open any row for the full rationale.

Ingredient Safety
Strong25/30

Clean allergen profile with a fragrance free formula.

No synthetic fragrance, no parabens, no EU Annex II banned substances. Diethylene Glycol Monoethyl Ether (Ethoxydiglycol) is a confirmed penetration enhancer used at a concentration suggesting meaningful presence in this formula. It increases how deeply all co-formulated actives absorb through the skin barrier. This is not a prohibited ingredient, but its use at this level in a daily leave-on facial serum represents a material safety consideration that is not communicated to consumers. Additionally, one ingredient is listed as 'Vegetable Oil', which is not a valid INCI name. Without knowing what oil it is, no safety, allergen, or comedogenicity assessment is possible for that ingredient.

Formula Logic
Strong20/25

The antioxidant combination is well-designed: the stable 3-O-Ethyl Ascorbic Acid derivative, Ferulic Acid, and Vitamin E work synergistically, with Ferulic Acid roughly doubling...

The antioxidant combination is well-designed: the stable 3-O-Ethyl Ascorbic Acid derivative, Ferulic Acid, and Vitamin E work synergistically, with Ferulic Acid roughly doubling the photoprotective efficacy of the vitamin combination. Ascorbyl Tetraisopalmitate is an oil-compatible vitamin C form that can reach areas water-based actives miss. CoQ10 regenerates oxidised Vitamin E for sustained antioxidant cycling. Sodium Phytate protects the vitamin C from premature oxidation in the bottle. The Ethoxydiglycol penetration enhancement may increase vitamin C efficacy but also increases absorption of all co-formulated ingredients. 'Vegetable Oil' cannot be evaluated for formulation logic without knowing its identity.

Claims Evidence
Fair14/25

The 10% vitamin C concentration is clearly stated on the label, which is a genuine transparency positive.

The 10% vitamin C concentration is clearly stated on the label, which is a genuine transparency positive. The 'clinically tested' claim appears on the product but no study is linked or accessible. Ferulic Acid concentration is not disclosed. 'Vegetable Oil' cannot be assessed for claims purposes. No published clinical studies for this formula are accessible.

Test Transparency
Grade CFair7/15

No clinical study, test report, or safety assessment is publicly accessible for this product despite the 'clinically tested' label claim.

No clinical study, test report, or safety assessment is publicly accessible for this product despite the 'clinically tested' label claim. The brand states 10% Vitamin C concentration, which is a positive disclosure, but no supporting data is accessible.

Consumer Clarity
Good3/5

The 10% vitamin C concentration is clearly communicated.

The 10% vitamin C concentration is clearly communicated. Ethoxydiglycol's penetration-enhancing mechanism is not disclosed. 'Vegetable Oil' as an unlabelled ingredient fails basic consumer clarity standards, as its identity, comedogenicity, and allergen status cannot be determined.

Ingredient list

26 ingredients · INCI order

SafeNoteCaution
Ingredient
Purified Water
Propanediol
3-O-Ethyl Ascorbic Acid
Houttuynia Cordata (Heartleaf) Extract
Diethylene Glycol Monoethyl Ether
Ferulic Acid
Tocophersolan (Vitamin E)
Sodium Hyaluronate
Show all 26 ingredients
Allantoin
Camellia Sinensis Leaf Extract (EGCG)
Ubiquinone (Coenzyme Q10)
Glycerin
Bis-PEG-18 Methyl Ether Dimethyl Silane
Sodium Phytate
Lecithin
Ascorbyl Tetraisopalmitate
Tocopherol
Sodium Metabisulphite
Sodium Benzoate
Hydroxyethylcellulose
Vegetable Oil
Disodium Ethylenediaminetetraacetate
Phenoxyethanol
Ethylhexylglycerin
Citric Acid
Sodium Hydroxide

INCI order as declared on packaging. Position reflects approximate concentration (high to low).

Regulatory screen

Each ingredient mapped against 10 global regulatory authorities

EU 1223/2009EU Cosmetics Regulation - Annexes II–VI

No flagged substances

India CR 2020India Cosmetics Rules, CDSCO

No flagged substances

Health Canada HotlistCanada prohibited & restricted ingredients

No flagged substances

US FDA 21 CFRUS FDA Parts 700–740

No flagged substances

MFDS KoreaKorea Cosmetics Act

No flagged substances

ECHA SVHCSubstances of Very High Concern

No flagged substances

IARCCarcinogen classifications Groups 1/2A/2B

No flagged substances

AICIS AustraliaAustralian industrial chemical safety

No flagged substances

TGA AustraliaTherapeutic claims (if applicable)

No flagged substances

Canada NHPIDNatural health product ingredients

No flagged substances

Flags are based on publicly available INCI only. Not a substitute for full regulatory compliance review.

Claims check

Each marketing claim assessed against publicly available evidence

10% Vitamin CPublicly supported

Brand explicitly states 10% 3-O-Ethyl Ascorbic Acid on label.

Evidence visible

Clinically testedNeeds proof

Claim appears on product but no clinical study is linked or accessible.

Mentioned only

BrighteningNeeds proof

Vitamin C mechanism is established but no formula-level study published.

Mentioned only

Ferulic Acid doubles efficacyNeeds proof

The synergy mechanism is scientifically established but Ferulic Acid concentration in this formula is not disclosed.

Mentioned only

What would improve this score

Public evidence the brand could provide to close verification gaps

  • Ferulic Acid concentration not disclosed
  • 'Vegetable Oil' identity not disclosed - comedogenicity and allergen profile unassessable
  • No published clinical study accessible despite 'clinically tested' label claim
  • Ethoxydiglycol penetration-enhancing mechanism not disclosed to consumers
About this review

An intelligently designed antioxidant serum with a confirmed 10% stable Vitamin C, but the unlabelled 'Vegetable Oil' is a material transparency gap and Ethoxydiglycol's penetration-enhancing role is not disclosed.

Independent reviewPublic evidence only
Full methodology
  • What global regulations say about each ingredient
  • What toxicology evidence shows at cosmetic concentrations
  • What formula concentration context changes
  • What the product format and leave-on contact time changes
  • What the stated user group needs
  • What published test evidence confirms
  • What the brand is claiming vs what evidence supports

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