Medik8 Crystal Retinal 20 retinaldehyde night serum 1 oz — high-strength 0.20% with hyaluronic acid & vitamin E

Medik8 Crystal Retinal 20 is a high-strength nighttime serum that uses 0.20% retinaldehyde plus hydration boosters to help refine texture and support firmer-looking skin.

This concentrated night treatment from Medik8 combines a potent retinaldehyde derivative with hyaluronic acid, glycerin and vitamin E to target visible signs of aging while replenishing moisture. Designed as the most advanced step in the Crystal Retinal range, the formula is intended for users who have already adapted to lower strengths or who regularly use retinoids. It arrives in a stabilized delivery that balances efficacy with skin comfort and is presented in a 1 oz serum suitable for evening skincare routines.

How quickly can I expect to see smoother skin?

Results vary by individual, but many people notice improvements in surface texture and radiance within a few weeks of consistent nightly use. Because retinaldehyde converts to active vitamin A in the skin, it works more efficiently than basic retinol, helping accelerate visible renewal while supporting moisture balance.

• Use nightly after cleansing and before moisturizer for best contact with skin.
• Expect gradual changes; consistent application improves results over time.
• Combine with gentle hydration to reduce dryness and maintain comfort.

What strength is Crystal Retinal 20 and who should use it?

Crystal Retinal 20 contains 0.20% retinaldehyde, the highest concentration in the Kristal line, intended for experienced retinoid users. If you’ve previously tolerated Crystal Retinal 10 or another strong retinoid, this level increases retinal potency for enhanced resurfacing and visible refining.

• Recommended for users who have built tolerance to lower retinal concentrations.
• Not the first step for those new to vitamin A; begin with lower strengths if needed.
• Works well within a layered routine that emphasizes gentle cleansing and hydration.

How does this serum hydrate while delivering strong retinal activity?

Medik8 pairs retinaldehyde with humectants like hyaluronic acid and glycerin and the antioxidant vitamin E to support skin hydration and barrier resilience. These complementary ingredients help retain moisture, reduce the appearance of dryness, and soothe the skin while the retinal works on renewal.

• Hyaluronic acid attracts and holds water to plump skin temporarily.
• Glycerin supports natural moisture levels and skin comfort.
• Vitamin E provides antioxidant support and helps protect lipids in the skin.

Can this serum fit into my existing skincare routine without irritation?

Yes, with gradual introduction and supportive products. Start by using Medik8 Crystal Retinal 20 two to three nights per week and increase frequency as your skin adapts. Pair it with gentle cleansers, non-exfoliating moisturizers and daily sunscreen in the morning to maintain barrier health and minimize sensitivity.

• Begin slowly — alternate nights or use a pea-sized amount to minimize irritation.
• Avoid combining with other strong exfoliants or prescription retinoids without guidance.
• Always apply sunscreen the next morning; retinal increases photosensitivity.

Who is this for? Medik8 Crystal Retinal 20 is aimed at adults experienced with retinoid-style treatments who want a powerful nighttime serum to refine texture, support firmness and boost radiance while maintaining hydration. It suits people comfortable with progressive retinal programs and those seeking a lab-formulated, science-driven product to step up their anti-aging regimen. If you are new to vitamin A, consider beginning with a lower concentration in the Crystal Retinal family and consult skincare professionals for personalized advice.

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.