Medik8 C-Tetra Vitamin C Face Serum with Squalane, 1.0 fl oz — Lightweight Antioxidant Hydration

Medik8 C‑Tetra is a lightweight daily facial serum combining stabilized vitamin C (tetrahexyldecyl ascorbate) with squalane to deliver antioxidant support and fast‑absorbing hydration for a range of skin types.

This serum is designed as a morning‑friendly step to add antioxidant protection and visible smoothing to your daily routine without a heavy or greasy finish. Medik8 pairs a stable, oil‑soluble form of vitamin C with vitamin E and plant‑derived squalane so the formula absorbs quickly, layers easily under moisturizer and SPF, and supports skin that looks balanced and comfortable throughout the day.

How will this serum fit into my morning routine?

Apply C‑Tetra after cleansing and toning, before your moisturizer and sunscreen. Its lightweight texture sinks in quickly, allowing you to follow with hydrating creams and SPF without pilling or heaviness.

• Use 2–4 drops on dry or slightly damp skin.
• Pat gently across face and neck until absorbed.
• Layer your regular moisturizer and then SPF for daytime protection.

What active ingredients are in the formula and what do they do?

The serum centers on tetrahexyldecyl ascorbate, a stable, oil‑soluble vitamin C derivative, supported by vitamin E and squalane for hydration and formulation stability. These actives are chosen to improve overall skin texture and provide lightweight moisture without a sticky finish.

• Tetrahexyldecyl ascorbate (stable vitamin C) for antioxidant support and to help brighten skin appearance.
• Vitamin E to complement antioxidant activity and help preserve the formula.
• Squalane to replenish lipids and leave skin feeling soft and supple.

Will this serum suit my skin type and sensitivities?

C‑Tetra’s oil‑based vitamin C and squalane provide a gentle option for many skin types, including normal, combination, and dry skin. Because it’s lightweight and fast‑absorbing, people who dislike heavy oils often find it comfortable; however, anyone with very reactive skin should patch‑test first.

• Lightweight texture that doesn’t clog pores for most skin types.
• Suitable for layering under moisturizers and sunscreens without pilling.
• Patch test on the inner forearm if you have sensitive or reactive skin.

How does packaging and daily use support product longevity?

Medik8 formulates with stabilized ingredients and uses protective packaging to reduce oxidation and prolong potency. Regular, consistent morning use helps maintain the serum’s benefits while the small 1.0 fl oz size keeps product fresh through regular turnover.

• Stabilized vitamin C form resists rapid degradation compared with L‑ascorbic acid.
• Designed for daily AM application to slot easily into skincare routines.
• 1.0 fl oz size is convenient for frequent use and reduces waste from expired product.

Who is this for? Medik8 C‑Tetra is aimed at people seeking a non‑heavy, science‑forward vitamin C serum that layers well in morning routines. It’s a practical pick if you want antioxidant support plus lightweight hydration from squalane, especially for normal to dry or combination skin types who prefer quick‑absorbing skincare. Those with very sensitive or reactive skin should perform a patch test before full application.

Ingredients

Simmondsia Chinensis (Jojoba) Seed Oil, Cyclopentasiloxane, Cyclohexasiloxane, Tetrahexyldecyl Ascorbate, Citrus Grandis (Grapefruit) Peel Oil, Tocopheryl Acetate, PPG-12/SMDI Copolymer, Limonene, Citral, Linalool, Geraniol.