Medik8: the honest verdict.
The British clinical skincare brand built on the CSA philosophy — Vitamin C in the morning, Sunscreen always, Vitamin A at night. Tested across C-Tetra, Crystal Retinal, and Hydr8 B5.
- Position
- Premium · Clinical skincare
- Founded
- United Kingdom · 2009
- Available at
- Adore Beauty + clinics
The Glow read.
Medik8's CSA philosophy is the most evidence-based routine framework on the consumer skincare market. The brand argues — correctly — that 80% of skincare results come from three categories used consistently: vitamin C, SPF, and vitamin A. Their products are built to deliver each.
Crystal Retinal is the standout. Encapsulated retinal (not retinol — one step closer to retinoic acid) at concentrations from 1 to 24, allowing clinical-grade actives without the prescription pathway. C-Tetra is a stable tetrahexyldecyl ascorbate vitamin C suitable for sensitive skin that can't tolerate L-ascorbic acid. Hydr8 B5 is one of the better hyaluronic acid serums on the shelf.
Medik8 is the brand to recommend when someone asks 'what should I actually use'. The CSA framework removes the decision fatigue that paralyses most skincare buyers. Pricing is clinical-tier ($85-150 per piece) but lower than SkinCeuticals.
What works
- Crystal Retinal — encapsulated retinal at clinical concentrations without prescription
- C-Tetra — stable vitamin C for sensitive skin that can't tolerate L-ascorbic acid
- CSA framework gives consumers a clear routine logic — rare in the category
- Pricing is premium but lower than SkinCeuticals for comparable actives
- Distribution through dermatology clinics gives in-person consultation access
What doesn't
- Brand recognition outside of skincare obsessives is low in Australia
- Crystal Retinal scaling system (1, 3, 6, 10, 24) confuses first-time buyers
- No SPF in the range — you'd buy La Roche-Posay or Ultra Violette to complete the CSA
The buy.
Affiliate disclosure: Glow earns commission from qualifying purchases. Read more.
What's actually in it.
- Actives
- C-Tetra: 14% tetrahexyldecyl ascorbate (stable, non-irritating vitamin C ester) + vitamin E + squalane. Crystal Retinal: encapsulated retinaldehyde at 1-24mg/g concentrations.
- Preservation
- Phenoxyethanol + ethylhexylglycerin. Within EU/TGA safe limits.
- Allergens
- Genuinely fragrance-free across the clinical range.
- Editorial concerns
- None at use concentration. Formulation work is editorial-preferred. CSA framework is evidence-based.
Index grade is editorial, not paid. The grade reflects what's in the product against Glow's v1.0 watch list — it sits beside the Glow score, not instead of it. Medik8 earns a Grade A on formulation and on framework. The CSA philosophy (Vitamin C, Sunscreen, vitamin A) is the most evidence-based consumer skincare routine on the Australian market. If a friend asks 'what should I actually use', this is the answer.