Medik8 Crystal Retinal 3 Night Face Serum — 0.03% Retinaldehyde, 30 ml, Hydrating & Gentle

Medik8 Crystal Retinal 3 is a gentle nighttime face serum that uses 0.03% retinaldehyde with hydrating ingredients to help smooth skin texture and reduce the appearance of fine lines.

Designed as an entry-level strength in Medik8's Crystal Retinal line, this 1 oz night serum combines retinaldehyde — a potent vitamin A derivative — with hyaluronic acid, glycerin and vitamin E to hydrate while supporting skin-smoothing processes overnight. The formula is gluten free and crafted to balance efficacy with tolerance, making it suitable for people starting a retinoid routine or those who prefer a milder nightly treatment.

How does this serum fit into a nightly skincare routine?

Apply a pea-sized amount to clean, dry skin in the evening after cleansing and any water-based treatments. Use it before heavier oils or creams, and follow with SPF during daytime — retinoids can increase sun sensitivity. Start with two or three nights per week and increase frequency as your skin acclimates.

• Use on cleansed, dry skin — wait a few minutes after water-based products.
• Apply a small amount across face, avoiding eyes and lips.
• Layer moisturizer on top if needed to reduce potential dryness.
• Always pair with daily broad-spectrum sunscreen in the morning.

What key ingredients are in Crystal Retinal 3 and what do they do?

The serum centers on 0.03% retinaldehyde, a convertable form of vitamin A that works faster than retinol while often being better tolerated. Hyaluronic acid and glycerin attract and retain moisture, and vitamin E provides antioxidant support and helps condition the skin barrier. The combination aims to resurface texture while maintaining hydration.

• 0.03% retinaldehyde — gentle, effective vitamin A derivative.
• Hyaluronic acid — draws moisture into the skin for plumping effect.
• Glycerin — humectant to support hydration and skin comfort.
• Vitamin E — antioxidant that helps nourish and protect the barrier.

Will this product cause irritation or peeling?

Because Crystal Retinal 3 is formulated as the mildest strength in the Crystal Retinal range, it’s designed to minimize discomfort while delivering retinal benefits. Some users may experience slight dryness or flaking during the initial adjustment period; these reactions usually ease as tolerance builds. If irritation occurs, reduce frequency or pair with a richer moisturizer.

• Begin with infrequent use (2–3 nights weekly) and gradually increase.
• Combine with a soothing moisturizer to manage dryness.
• Discontinue if severe irritation or persistent redness develops.

How does Crystal Retinal 3 differ from retinol products?

Retinaldehyde is a more advanced vitamin A intermediate that converts to the active form (retinoic acid) faster than retinol, which can translate to quicker visible results at similarly low irritation risk. Medik8 pairs the retinal with hydrating and barrier-supportive ingredients to help reduce the common side effects associated with vitamin A therapies.

• Faster conversion to active form versus retinol.
• Formulated with humectants to help maintain moisture balance.
• Available as a progressive-strength system for gradual acclimation.

Who is this for? Crystal Retinal 3 suits people new to retinal or retinoid treatments and anyone looking for a gentler vitamin A option that still supports smoother-looking skin. It’s a practical choice for those wanting to start an anti-aging regimen without immediately moving to higher-strength retinal products, and for users who prefer a nighttime serum that also hydrates.

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