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Medik8 Crystal Retinal 3
Medik8

Crystal Retinal 3

Looks good 4.4 / 5

A credible beginner retinal serum with a verified full INCI list and a solid mix of retinoid, hydrators, and supportive actives. The main trade-offs are potential irritation and the presence of fragrance-related components, so it fits best as a night treatment for users who tolerate vitamin A.

Skin

How it’s judged

Scored for skin — based on what its ingredients contribute.

What it may help with

Hydration i3.8 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

From Sodium Hyaluronate, Glycerin, Squalane, Sodium Polyaspartate

Anti aging i3.8 / 4

Whether it can help visible signs of aging — fine lines, wrinkles, loss of firmness, or photoaging.

From Retinal, Tetrahexyldecyl Ascorbate, 3-O-Ethyl Ascorbic Acid, Sodium Hyaluronate

UV protection i3.8 / 4

Whether it provides direct protection against UV radiation.

From Titanium Dioxide, 3-O-Ethyl Ascorbic Acid, Lonicera Japonica (Honeysuckle) Flower Extract

Texture i3.5 / 4

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

From Retinal, 3-O-Ethyl Ascorbic Acid, Squalane, Sodium Hyaluronate

Acne i3.5 / 4

Whether it can help acne-prone skin — reducing clogged pores, excess oil, acne-causing bacteria, inflammation, or breakouts.

From Retinal, 3-O-Ethyl Ascorbic Acid

Things to watch

Sensitization i2.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

From Coumarin, Dipteryx Odorata Bean Extract, Tocopheryl Acetate, Phenoxyethanol

Photosensitivity i2.5 / 4

Whether it can make skin more sensitive to sunlight, raising the risk of sunburn or UV-related irritation. Relevant for some exfoliating acids, retinoids, and certain plant-derived ingredients.

From Retinal

Irritation i2.0 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

From Retinal, Phenoxyethanol, Ethylhexylglycerin, Tocopheryl Acetate

Eye irritation i1.5 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

From Phenoxyethanol, Ethylhexylglycerin, 1,2-Hexanediol

Acne aggravation i1.0 / 4

Whether it may worsen breakouts — clogging pores, feeling heavy on acne-prone skin, or triggering comedones in some users.

From Tocopheryl Acetate, Moringa Oleifera Seed Oil

About this product

A retinal serum from Medik8, identified from official and retailer sources as Crystal Retinal 3 with 0.03% retinaldehyde. The formula combines a proven vitamin A active with humectants, emollients, and supportive antioxidants, but it is not fragrance-free and may still irritate reactive skin. The ingredient list was verified from a named retailer source matching the exact brand and variant.

Good signs
  • Contains retinal, a well-supported vitamin A active for texture, acne marks, and aging concerns.
  • Includes multiple hydrators and emollients that should help reduce the dryness often associated with retinoids.
  • Uses a beginner-strength retinal level, which is generally more approachable than stronger vitamin A serums.
  • Adds antioxidant support alongside the retinoid base.
Watch-outs
  • Retinoid products can still irritate, especially during the first few weeks of use.
  • Fragrance-related botanicals and coumarin may be an issue for fragrance-sensitive skin.
  • The formula is not especially minimal, so there are more potential triggers than in a stripped-down treatment serum.
Best for
  • beginners to retinal
  • texture and early anti-aging routines
  • acne-prone skin that tolerates retinoids
  • users wanting a mid-weight night serum
  • normal
  • dry
  • combination
  • oily
  • mature
  • acne-prone
  • sensitive
How to use it
  • Use at night on dry skin and introduce slowly.
  • Avoid layering with other strong actives at first.
  • Daily sunscreen is important while using retinal.
  • Patch testing is prudent for sensitive or reactive skin.

What people say online

Summarised from public reviews across the web — subjective experience, not our formula assessment.

Users generally describe it as an effective beginner retinal with good results, though some mention cost, gradual adjustment, and occasional irritation.

visible improvement over time
good starter retinoid
smooth texture
pricey
can irritate at first
some fragrance sensitivity concerns

Aggregated from publicly available reviews. SpottyLabs does not sell this product.

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