The Glow Catalyst Serum — Vitamin C 15% Brightening Serum

The Glow Catalyst Serum

Fade dark spots and boost radiance with stable, potent vitamin C that actually works

15% Vitamin C (Ethyl Ascorbic Acid)

Size:

50ml

Vitamin C 15% Brightening Serum

Not all Vitamin C is equal. This formula uses 3-O-Ethyl Ascorbic Acid — a stable, skin-penetrating form of Vitamin C that does not oxidise in the bottle. At 15%, it is here to visibly brighten skin tone, help fade the appearance of dark spots, and protect against environmental damage throughout the day. Always follow with SPF.

Key Actives

3-O-Ethyl Ascorbic Acid 15% — A stable, highly bioavailable form of Vitamin C. Brightens, protects, and supports collagen synthesis.
Panthenol 0.5% — Vitamin B5 to soothe and support skin health alongside the active.
Tocopherol (Vitamin E) 0.1% — Works synergistically with Vitamin C to enhance antioxidant protection.

What It Does

Brightens skin tone and helps fade the appearance of uneven pigmentation. Antioxidant protection throughout the day.

How to Use

Apply 2-3 drops in AM. Always follow with SPF.

Cleanse your face in the morning.
Apply 2-3 drops to face and neck.
Gently press into skin until absorbed.
Follow with moisturiser.
ALWAYS apply SPF after (non-negotiable).
Use every morning for best results.

Tip: Vitamin C works best in AM to protect against environmental damage throughout the day.

Benefits

Brightens - Protects - Firms - Smooths

For external use only. Avoid contact with eyes. Patch test before first use. Keep out of reach of children.

Made in Britain | 30ml / 1.01 fl.oz | skinometri | Skincare that Adds Up

How to Use

Full Ingredients List

The Science

The Science Behind a Brighter Complexion

15% Ethyl Ascorbic Acid (Vitamin C): Standard Vitamin C (L-Ascorbic Acid) is notoriously unstable and can oxidize quickly, losing its effectiveness. We use a highly stable, next-generation form of Vitamin C called 3-O-Ethyl Ascorbic Acid. This allows it to remain potent from the first drop to the last, delivering its full benefits:

Powerful Brightening: As a potent antioxidant, it helps to neutralize free radicals and inhibit the enzyme responsible for producing dark spots (melanin) [1]. A systematic review of clinical studies confirmed that Vitamin C is an effective treatment for depigmentation of hyperpigmented spots [2].
Boosts Radiance: It helps to support collagen production, which improves skin elasticity and firmness, giving your skin a healthy, radiant glow [3].
Antioxidant Protection: It helps to protect your skin from environmental stressors like pollution and UV radiation, which can cause premature aging [4].

Why it works: By using a stable and potent form of Vitamin C at a clinically effective 15% concentration, this serum provides powerful antioxidant protection and visible brightening results without the stability issues of older formulas. Studies have shown that 3-O-Ethyl Ascorbic Acid is an effective skin-whitening agent and is well-suited for cosmetic use [5].

References

[1] Sanadi, R. M., & Pawar, B. (2020). The effect of Vitamin C on melanin pigmentation – A systematic review. Journal of Pharmaceutical Research International, 32(24), 74–84. https://pmc.ncbi.nlm.nih.gov/articles/PMC7802860/

[2] Correia, G., Gomes, J., & Duarte, I. (2023). Efficacy of topical vitamin C in melasma and photoaging: A systematic review. Journal of Cosmetic Dermatology, 22(8), 2156–2165. https://pubmed.ncbi.nlm.nih.gov/37128827/

[3] Boo, Y. C. (2022). Ascorbic Acid (Vitamin C) as a Cosmeceutical to Increase Dermal Collagen for Skin Antiaging Purposes: Emerging Combination Therapies. Antioxidants, 11(9), 1663. https://www.mdpi.com/2076-3921/11/9/1663

[4] Harvard Health Publishing. (2021, November 10). Why is topical vitamin C important for skin health? https://www.health.harvard.edu/blog/why-is-topical-vitamin-c-important-for-skin-health-202111102635

[5] Chen, S. J., Wu, C. C., Huang, H. Y., Chen, J. Y., Wang, Y. J., & Lin, Y. L. (2021). The anti-melanogenic effects of 3-O-ethyl ascorbic acid via Nrf2-mediated α-MSH inhibition in UVA-irradiated keratinocytes and autophagy induction in melanocytes. Free Radical Biology and Medicine, 176, 130–139. https://www.sciencedirect.com/science/article/pii/S0891584921004299

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