The Skin Diary Pro-Helix C Collagen Peptide Brightening Serum 30ml

Your morning glow, with firmness in focus

The Skin Diary Pro-Helix C Collagen Peptide Brightening Serum combines vitamin C, antioxidant care and two signalling peptides in one lightweight morning step. Its milky texture absorbs quickly, making room for sunscreen and makeup without a lengthy routine.

Designed for skin concerned with dullness, fine lines and lost elasticity, Pro-Helix C pairs visible brightening with care for a firmer, more supple-looking complexion. The neutral-pH, fragrance-free formula is dermatologically approved for sensitive skin, according to the supplied brand information. Individual tolerance can still vary.

Size: 30 mL.

What makes the formula different?

THDA vitamin C is paired with acetyl-zingerone and two peptides for complementary antioxidant and firmness-focused care. The peptides are described by the brand as targeting collagen-repair signalling and a growth-factor pathway. These mechanisms should not be confused with guaranteed changes in facial volume or a physical lifting effect.

The evidence, explained

• Brightness: 94% showed brighter skin after seven days in an independent clinical study of 35 people, with brightness assessed using a skin gloss meter.[1]
• Fine lines and wrinkles: the supplied independent clinical study of 35 people reported a reduction in their visible appearance from seven days.[2]
• Elastic-fibre marker: an independent Manchester Patch Test human-skin biopsy assay found a significant increase in fibrillin, a protein in the skin’s elastic-fibre network.[3]
• Perceived firmness: in a separate consumer study of 45 people over 28 days, 87% reported firmer, more plump-looking skin.[3]
• Antioxidant signalling: spatial transcriptomic analysis of human skin biopsy reported a 2.4-fold increase in SOD3 gene expression in basal keratinocytes.[4] This is a molecular marker, not a claim of 2.4 times more collagen or sun protection.

The brand also reports a 32% increase in a collagen-forming gene. The specific gene and supporting study details were not supplied, so this should not be read as a measured 32% increase in skin collagen. Laboratory and biopsy findings are distinct from clinical appearance measurements and consumer feedback. Individual results vary.

How does it compare with L-ascorbic acid?

This is a formulation comparison, not a direct comparative clinical trial. It does not establish that all L-ascorbic acid serums lack peptides, are unsuitable for sensitive skin or perform less well.

How to use

Apply evenly over the whole face every morning before sunscreen. The fast-absorbing milky texture is designed to layer with sunscreen and makeup.

Study notes

[1] Independent clinical study of 35 people, assessed by skin gloss meter at days 7, 28 and 56; the 94% figure relates to day 7.
[2] Independent clinical study of 35 people with assessments at days 7, 28 and 56.
[3] Independent Manchester Patch Test human-skin biopsy assay for fibrillin. Separate independent consumer study: 45 people, 28 days.
[4] SOD3 gene expression in basal keratinocytes, assessed by spatial transcriptomic analysis of human skin biopsy.

Ingredient information

The ingredients described here are highlights, not a full ingredient list. Refer to packaging for complete formulation details.

Apply evenly to the whole face every morning before sunscreen.

The lightweight, fast-absorbing milky texture is designed to layer with sunscreen and makeup. Follow packaging instructions.

KEY INGREDIENT HIGHLIGHTS, NOT A COMPLETE INCI LIST

THDA vitamin C: Vitamin C ingredient highlighted in the supplied formula information.
Acetyl-zingerone: Complementary antioxidant ingredient.
Two signalling peptides: Described by the brand as targeting collagen-repair signalling and a growth-factor pathway; exact peptide names were not supplied.

Neutral-pH formula with no added fragrance, according to supplied brand information.

Refer to packaging for the complete ingredient list.

The Skin Diary presents its Cell-to-Surface™ approach through three types of evidence: cellular investigation, measured skin-surface outcomes and consumer perception. Pro-Helix C combines vitamin C and peptide care in a neutral-pH morning serum, with these evidence types reported separately.

CLINICAL APPEARANCE MEASUREMENTS
Brightness: Independent study of 35 people using a skin gloss meter at days 7, 28 and 56. 94% showed brighter skin at day 7.
Fine lines and wrinkles: Independent clinical study of 35 people, assessed at days 7, 28 and 56; visible reduction reported from day 7.

CONSUMER PERCEPTION
Independent study of 45 people over 28 days: 87% reported firmer, more plump-looking skin.

HUMAN-SKIN BIOPSY ASSAY
Independent Manchester Patch Test assay reported a significant increase in fibrillin, a protein in the elastic-fibre network. This is distinct from a consumer assessment of firmness.

MOLECULAR ANALYSIS
Spatial transcriptomic analysis of human skin biopsy reported a 2.4-fold increase in SOD3 gene expression in basal keratinocytes. This is an antioxidant-defence signalling marker, not a measured 2.4-fold increase in clinical protection or collagen.

ADDITIONAL BRAND-REPORTED FINDING
32% increase in a collagen-forming gene. The specific gene and supporting study details were not supplied. This does not establish a 32% increase in skin collagen.

Study summaries are based on supplied brand information. No head-to-head trial against L-ascorbic acid serums was supplied. Results vary.

Q: Who is Pro-Helix C for?
A: Skin concerned with dullness, fine lines and loss of elasticity or firmness.

Q: What does it feel like?
A: It is a lightweight, fast-absorbing milky serum designed to layer with sunscreen and makeup.

Q: When should I use it?
A: Apply evenly to the whole face every morning before sunscreen.

Q: Is it suitable for sensitive skin?
A: The brand describes a dermatologically approved, neutral-pH formula with no added fragrance for sensitive skin. Individual tolerance varies.

Q: What does the 94% brightness figure mean?
A: 94% showed brighter skin after seven days in an independent 35-person study using a skin gloss meter. It does not mean brightness increased by 94%.

Q: What does the 87% firmness figure mean?
A: In a separate consumer study of 45 people over 28 days, 87% reported firmer, more plump-looking skin.

Q: Is the 2.4x finding a visible improvement measurement?
A: No. It refers to SOD3 gene expression in basal keratinocytes in human-skin biopsy analysis, not a 2.4-fold visible effect or sun protection.

Q: Does the 32% gene result mean 32% more collagen?
A: No. Gene-expression findings are not direct measurements of total skin collagen. Further study details were not supplied.

Q: Is it proven better than every L-ascorbic acid serum?
A: No head-to-head trial was supplied. Other formulas vary in pH, peptides and sensitive-skin suitability.

Q: What size is it?
A: 30 mL.

Q: Where can I find the full ingredient list?
A: Refer to packaging; the ingredient section contains highlights only.