Head to head
Medik8 Crystal Retinal 6 vs The Ordinary Retinol 0.5% in Squalane
Same comparison whichever way you searched it: The Ordinary Retinol 0.5% in Squalane vs Medik8 Crystal Retinal 6.
The bottom lineMedik8 Crystal Retinal 6 does more across the board (it leads on hydration, brightening / tone), while The Ordinary Retinol 0.5% in Squalane is the simpler, more pared-back pick.
Reach for Medik8 Crystal Retinal 6 if you want the actives; The Ordinary Retinol 0.5% in Squalane if you want fewer ingredients doing less, gently.
Answer nine questions and the app picks between them for your skin.
Cost per use
€0.57 an applicationabout 150 uses from 30 ml
a usual amount, not a measured dose: 3-5 drops, about 0.2 ml; from €86 as read in September 2026 and a 30 ml pack.
how this is counted
About €0.57 an application, about 150 uses from 30 ml.
- a convention: no trial has measured a serum dose
- Measured or assumed: the rule, and the dose table
€0.05 an applicationabout 150 uses from 30 ml
a usual amount, not a measured dose: 3-5 drops, about 0.2 ml; from €8 as read in September 2026 and a 30 ml pack.
how this is counted
About €0.05 an application, about 150 uses from 30 ml.
- a convention: no trial has measured a serum dose
- Measured or assumed: the rule, and the dose table
Per application, The Ordinary Retinol 0.5% in Squalane is the cheaper: €0.05 against €0.57.
Which should you pick?
Pick Crystal Retinal 6 if
- plump, lasting hydration is what you want
- dark spots, dullness or an uneven tone are your focus
- you want more actives working at once
Pick Retinol 0.5% in Squalane if
- your skin is sensitive or reacts to fragrance
- you want the more affordable option
- you prefer a simpler, more minimal formula
What each delivers
Side by side
| Crystal Retinal 6 | Retinol 0.5% in Squalane | |
|---|---|---|
| Type | Serum | Serum |
| Key actives | Glycerin, Retinal, Squalane | Retinol 0.5%, Squalane, Jojoba Oil |
| Texture | A rich, cushiony cream that sinks in slowly. | A light, fast-absorbing texture that layers cleanly under the rest of your routine, with no greasy film. |
| Fragrance | Contains fragrance | None detected |
| Feeds Malassezia | 4 measured / 3 inferred | 1 measured / none inferred |
| Pregnancy | One caution | One caution |
| Ingredients | 47 listed | 8 listed |
| Price | ~€86 | ~€8 |
What's in one but not the other
The two labels share 3 of the 52 ingredients between them. The actives are where they part company.
What each one adds acts on The stratum corneum, The living epidermis, Not established for Medik8 Crystal Retinal 6 and The living epidermis, The stratum corneum for The Ordinary Retinol 0.5% in Squalane. That is the layer each is understood to act on, not how deep it travels.
Only in Medik8 Crystal Retinal 6
Only in The Ordinary Retinol 0.5% in Squalane
The Ordinary Retinol 0.5% in Squalane is a different bottle only for: retinol, jojoba oil.
Which keeps longer
a tube and one light-sensitive active: the packaging is doing work here.
where this comes from
The pack form is read off the packshot; the light-sensitive actives are the base's photostability rows, sourced on each glossary page; the period after opening (not printed) is read off the maker's page, never a reseller's. Catalogue checked September 2026.
a dropper bottle and one light-sensitive active: the packaging is doing work here.
where this comes from
The pack form is read off the packshot; the light-sensitive actives are the base's photostability rows, sourced on each glossary page; the period after opening (3M on the pack) is read off the maker's page, never a reseller's. Catalogue checked September 2026.
Medik8 Crystal Retinal 6 is the one to keep if you use it slowly: a tube, one light-sensitive active.
The molecule doing the work
Better for…
- Dark spots & uneven toneCrystal Retinal 6
- Fine lines & firmnessEither works
- Dryness & dehydrationCrystal Retinal 6
- Sensitive, reactive skinRetinol 0.5% in Squalane
Who each suits
- Medik8 Crystal Retinal 6
- dry, combination, oily, normal · avoid with very sensitive skin, acne-prone skin (at high strength), breastfeeding and compromised barrier
- The Ordinary Retinol 0.5% in Squalane
- combination, oily, sensitive, normal · avoid with acne-prone skin (at high strength), breastfeeding, compromised barrier and fungal acne (with heavy use)
The Ordinary Retinol 0.5% in Squalane is the cheaper of the two (~€8 vs ~€86).
Ready to pick one?
Affiliate links, so a purchase sends us a small commission at no extra cost to you. As an Amazon Associate, Glow Simplified earns from qualifying purchases. We make and sell nothing here, so the verdict above never bends toward a sale.
And if you keep both?
Most people reading a comparison are choosing. If you already own both, the question is a different one, and it has an answer.
Use these with care.
Not studied together, but two retinoids work on the same receptors: on one night that reads as one bigger dose of the same thing, more irritation, no more effect.
One a night, and keep two nights a week free of both.
Common questions
Is Medik8 Crystal Retinal 6 or The Ordinary Retinol 0.5% in Squalane better for dark spots & uneven tone?
For dark spots & uneven tone, Medik8 Crystal Retinal 6 is the stronger pick by our read of the two formulas. Medik8 Crystal Retinal 6 does more across the board (it leads on hydration, brightening / tone), while The Ordinary Retinol 0.5% in Squalane is the simpler, more pared-back pick. Reach for Medik8 Crystal Retinal 6 if you want the actives; The Ordinary Retinol 0.5% in Squalane if you want fewer ingredients doing less, gently.
Which is cheaper, Medik8 Crystal Retinal 6 or The Ordinary Retinol 0.5% in Squalane?
The Ordinary Retinol 0.5% in Squalane is the cheaper of the two (~€8 vs ~€86).
Can I use Medik8 Crystal Retinal 6 and The Ordinary Retinol 0.5% in Squalane together?
They are both serums, so you would normally pick one rather than layer both in the same step. You can keep both and alternate them (morning and night, or on different days) if you like variety, but you do not need two.
What the scene shows
The cross-section at the top of this page is not decoration and not a diagram of the skin in general: it places the molecules these two are sold on at the layer each is understood to act on. Medik8 Crystal Retinal 6 is placed by Glycerin (the stratum corneum), Retinal (the living epidermis), Squalane (the stratum corneum). The Ordinary Retinol 0.5% in Squalane is placed by Retinol (the living epidermis), Squalane (the stratum corneum), Jojoba Oil (the stratum corneum). A layer is where an ingredient does its work, never how deep it travels, and never a claim about how well it works.
Compare it with…
46 duels are built for this serum, Celimax The Vita A Retinal Shot Tightening Booster and The Ordinary Granactive Retinoid 2% Emulsion among them: type a name, or pick one below.