Medik8 Crystal Retinal 20 Night Serum — 0.20% Retinaldehyde, Hydrating Firming Serum with Hyaluronic Acid

This powerhouse night serum from Medik8 combines retinaldehyde (a potent vitamin A derivative) with hyaluronic acid, glycerin and vitamin E to smooth and hydrate skin while supporting visible surface renewal. Crystal Retinal 20 is the strongest step in the Crystal Retinal progressive range and is formulated for users who have already adapted to lower strengths or who are experienced retinoid users. The formula emphasizes both resurfacing action and moisture support to minimize dryness often associated with potent vitamin A products.

How does Crystal Retinal 20 help refine skin texture overnight?

Retinaldehyde supports the skin’s natural renewal cycle by encouraging surface cell turnover, which helps soften roughness and even out skin tone. Hydrators like hyaluronic acid and glycerin maintain moisture to prevent the tightness or flaking that can accompany strong vitamin A actives.

• Contains 0.20% retinaldehyde to support visible resurfacing.
• Hyaluronic acid provides multi-depth hydration to plump fine lines.
• Glycerin and vitamin E help restore barrier comfort and antioxidative support.

Can I use this serum if I’m new to retinal or retinoids?

Crystal Retinal 20 is the maximum strength in the Crystal Retinal progression and is intended for people who have already acclimated to lower strengths, such as Crystal Retinal 6 or 10. New users should begin with a lower percentage product and gradually increase frequency to minimize irritation and allow the skin to adapt.

• Not recommended as a first retinal product; start lower and build tolerance.
• Introduce slowly—use 1–3 nights per week, increasing as tolerated.
• Always apply at night and follow with daytime SPF protection.

How should I incorporate Crystal Retinal 20 into my routine?

Use the serum in your evening routine after cleansing and before richer creams or oils. A pea-sized amount is typically sufficient; allow it to absorb before layering other treatments. Pairing with gentle hydrating products helps maintain comfort while maximizing results.

• Apply in the evening to clean, dry skin; start with small amounts.
• Follow with moisturizers to lock in hydration and soothe skin.
• Use daily sunscreen during daytime—retinal can increase sun sensitivity.

What makes Medik8’s Crystal Retinal 20 different from retinol?

Retinaldehyde is a direct precursor to retinoic acid and typically converts more quickly in skin than retinol, meaning faster visible effects while often offering a different tolerance profile. Medik8’s formulation combines this active with buffering hydrators to deliver strength alongside supportive ingredients for comfort.

• Retinaldehyde converts to the active retinoic form with fewer steps than retinol.
• Formulated with hyaluronic acid and glycerin to counteract dryness.
• Part of a graded strength system so users can progress safely to higher potency.

Who is this for? Crystal Retinal 20 is aimed at experienced retinoid users or customers who have successfully used Medik8 lower-strength retinal serums and want a stronger, clinically minded option for improving skin texture and reducing signs of aging. It’s suitable for people seeking a high-strength nighttime resurfacer who commit to gradual introduction, nightly use as tolerated, and consistent daytime sun protection. Not recommended for first-time retinal/retinoid users, pregnant or breastfeeding individuals, or anyone advised to avoid vitamin A derivatives without consulting a clinician.

Ingredients

Aqua (Water), Caprylic/Capric Triglyceride, Cyclodextrin, Glycerin, Isododecane, Eclipta Prostrata Extract, Cetearyl Olivate, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Alcohol, PPG-12/SMDI Copolymer, Sorbitan Olivate, Tocopheryl Acetate, Squalane, Rubus Chamaemorus (Cloudberry) Seed Oil, Melia Azadirachta Leaf Extract, Sodium Hyaluronate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Phenoxyethanol, Pentylene Glycol, Retinal, Hydroxypropyl Methylcellulose, Daucus Carota Sativa (Carrot) Seed Oil, Titanium Dioxide,Sodium Polyaspartate, Climbazole, Moringa Oleifera Seed Oil, Alumina, Lonicera Japonica (Honeysuckle) Flower Extract, Isostearic Acid, Lecithin, Polyglyceryl-3 Polyricinoleate, Polyhydroxystearic Acid, Stearic Acid, Ethylhexylglycerin, Lonicera Caprifolium (Honeysuckle) Flower Extract, Tetrahexyldecyl Ascorbate, Disodium EDTA, 3-O-Ethyl Ascorbic Acid, Hydroxyacetophenone, Polysorbate 60, Sorbitan Isostearate, Dipteryx Odorata (Tonka) Bean Extract, BHT, Vanilla Planifolia (Vanilla) Fruit Extract, Decylene Glycol, 1,2-Hexanediol, Coumarin.