Medik8 Crystal Retinal 1 Retinaldehyde Night Serum 1 oz — Gentle 0.01% Vitamin A with Hyaluronic Acid

Medik8 Crystal Retinal 1 is a gentle, night-time retinaldehyde serum that helps smooth texture, support firmness, and hydrate skin while you sleep.

Designed as the entry-level strength in Medik8’s Crystal Retinal range, this 1 oz serum pairs retinaldehyde (a potent, fast-acting vitamin A derivative) with hyaluronic acid and vitamin E to visibly refresh skin tone and texture. Formulated for sensitive or retinoid‑new skin, Crystal Retinal 1 uses a mild 0.01% retinaldehyde concentration alongside humectants to reduce dryness and irritation commonly associated with stronger vitamin A products.

How will this serum fit into my nightly routine?

Apply Crystal Retinal 1 after cleansing and any water-based treatments, then follow with a moisturizer to lock in hydration. Because it’s a night serum, it’s intended for evening use only; during daytime use, incorporate a broad-spectrum sunscreen to protect newly resurfaced skin.

• Use a pea-sized amount for the entire face, avoiding the eye contours.
• Layer over serums such as hydrators before heavier creams.
• Start with every third night and increase frequency as tolerated.

What active ingredients are in Crystal Retinal 1 and what do they do?

The formula centers on retinaldehyde, which converts into the skin-active form of vitamin A more quickly than retinol, supported by hyaluronic acid for hydration and vitamin E for antioxidant support. Lightweight humectants like glycerin help maintain moisture balance while the retinal works to refine surface texture.

• 0.01% retinaldehyde — gentle resurfacing and cell-renewal support.
• Hyaluronic acid — draws and holds moisture for plumper-looking skin.
• Vitamin E — helps protect against environmental stressors.
• Glycerin — improves skin hydration and barrier comfort.

How quickly should I expect to see results, and are there side effects?

Response times vary: many users notice improved smoothness and tone within weeks, while longer-term texture and firmness changes appear over months with consistent use. Because retinaldehyde is active, mild flaking, sensitivity, or temporary redness can occur during the acclimation period—these are typical signs the skin is adjusting rather than lasting damage.

• Initial use: possible mild dryness or flaking—reduce frequency if needed.
• First 2–4 weeks: gradual improvement in texture for many users.
• Long-term: more noticeable smoothing and evenness with continued use.
• If persistent irritation occurs, pause and consult a skincare professional.

Why choose the Crystal Retinal 1 strength over other options?

Crystal Retinal 1 is formulated specifically for sensitive skin or those new to vitamin A derivatives, offering a low-dose option that still delivers meaningful resurfacing without the intensity of higher strengths. It lets you build tolerance before progressing to stronger concentrations in the same Medik8 lineup.

• Lowest retinal concentration (0.01%) for gentle introduction.
• Progressive system allows stepping up strengths when ready.
• Formulated with hydrators to counterbalance dryness risks.

Who is this for: Medik8 Crystal Retinal 1 is suited to anyone seeking a mild, science-backed nightly retinal serum—particularly those with sensitive skin, first-time retinal users, or anyone who prefers a gradual approach to vitamin A. It’s also appropriate for people wanting a hydrating night serum that supports smoother texture and more even-looking skin without jumping to stronger retinal concentrations. As with all active skincare, introduce it slowly and protect your skin from UV exposure during the day.

Ingredients

Water, Caprylic/Capric Triglyceride, Glycerin, Isododecane, Cetearyl Olivate, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Alcohol, PPG-12/SMDI Copolymer, Sorbitan Olivate, Tocopheryl Acetate, Squalane, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Hydroxyacetophenone, Cyclodextrin, 3-O-Ethyl Ascorbic Acid, Sodium Polyaspartate, Hydroxypropyl Methylcellulose, Sodium Hyaluronate, Phenoxyethanol, Tetrahexyldecyl Ascorbate, Daucus Carota Sativa (Carrot) Seed Oil, Retinal, Alumina, Isostearic Acid, Lecithin, Polyglyceryl-3 Polyricinoleate, Polyhydroxystearic Acid, Lonicera Japonica (Honeysuckle) Flower Extract, Lonicera Caprifolium (Honeysuckle) Flower Extract, Stearic Acid, Citric Acid, BHT, Rubus Chamaemorus Seed Oil, Polysorbate 60, Disodium EDTA, Ethylhexylglycerin, Sorbitan Isostearate, Pentylene Glycol, Vanilla Planifolia Fruit Extract, Dipteryx Odorata Bean Extract, Coumarin, Red 4, Titanium Dioxide/CI 77891.