Head to head
Celimax The Vita A Retinal Shot Tightening Booster vs Medik8 Crystal Retinal 6
Same comparison whichever way you searched it: Medik8 Crystal Retinal 6 vs Celimax The Vita A Retinal Shot Tightening Booster.
The bottom lineCelimax The Vita A Retinal Shot Tightening Booster does more across the board (it leads on barrier repair, brightening / tone, oil-control & blemishes), while Medik8 Crystal Retinal 6 is the simpler, more pared-back pick.
Reach for Celimax The Vita A Retinal Shot Tightening Booster if you want the actives; Medik8 Crystal Retinal 6 if you want fewer ingredients doing less, gently.
Answer nine questions and the app picks between them for your skin.
Cost per use
$0.29 an applicationabout 75 uses from 15 ml
a usual amount, not a measured dose: 3-5 drops, about 0.2 ml; from $22 as read in September 2026 and a 15 ml pack.
how this is counted
About $0.29 an application, about 75 uses from 15 ml.
- a convention: no trial has measured a serum dose
- Measured or assumed: the rule, and the dose table
€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
Per application, Celimax The Vita A Retinal Shot Tightening Booster is the cheaper: $0.29 against €0.57.
Which should you pick?
Pick The Vita A Retinal Shot Tightening Booster if
- you are dealing with breakouts and oiliness
- your barrier feels stressed and needs the support
- your skin is sensitive or reacts to fragrance
Pick Crystal Retinal 6 if
- it is the one you can get most easily or already trust
What each delivers
Side by side
| The Vita A Retinal Shot Tightening Booster | Crystal Retinal 6 | |
|---|---|---|
| Type | Serum | Serum |
| Key actives | Glycerin, Niacinamide, Retinal | Glycerin, Retinal, Squalane |
| Texture | A light, fast-absorbing texture that layers cleanly under the rest of your routine, with no greasy film. | A rich, cushiony cream that sinks in slowly. |
| Fragrance | None detected | Contains fragrance |
| Feeds Malassezia | 3 measured / 2 inferred | 4 measured / 3 inferred |
| Pregnancy | One caution | One caution |
| Ingredients | 32 listed | 47 listed |
| Price | ~$22 | ~€86 |
What's in one but not the other
The two labels share 12 of the 67 ingredients between them. The actives are where they part company.
What each one adds acts on The living epidermis, The dermis, The stratum corneum for Celimax The Vita A Retinal Shot Tightening Booster and The stratum corneum, Not established for Medik8 Crystal Retinal 6. That is the layer each is understood to act on, not how deep it travels.
Only in Celimax The Vita A Retinal Shot Tightening Booster
Only in Medik8 Crystal Retinal 6
Medik8 Crystal Retinal 6 is a different bottle only for: squalane, hyaluronic acid, thd ascorbate.
Which keeps longer
a tube and two light-sensitive actives: 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 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.
Medik8 Crystal Retinal 6 is the one to keep if you use it slowly: a tube, one light-sensitive active.
Where each label stops telling you the dose
Ingredients are listed in order of how much is inside, but only down to 1%. Below that the brand may list them in any order it likes, so the bottom of a label is a set, not a ranking. These two stop being a ranking in very different places.
Celimax The Vita A Retinal Shot Tightening Booster
ordered for its first 47%
- 1Water
- 2Butylene Glycol
- 3Glycerin
- 4Caprylic/Capric Triglyceride
- 5Cetearyl Alcohol
- 6Niacinamide
- 7Diisostearyl Malate
- 81,2-Hexanediol
- 9Polypropylsilsesquioxane
- 10Panthenol
- 11Cetearyl Olivate
- 12Cetearyl Glucoside
- 13Sorbitan Olivate
- 14Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
- 15Lecithin
- 16Carbomer
- 17Arginine
- 18Dimethicone/Vinyl Dimethicone Crosspolymer
- 19Tocopherol
- 20Retinal
- 21Xanthan Gum
- 22Ethylhexylglycerin
- 23Adenosine
- 24Sorbitan Isostearate
- 25Sodium Lactate
- 26Hydrolyzed Sponge
- 27Disodium EDTA
- 28Polysorbate 20
- 29Ascorbic Acid
- 30Glucose
- 31Palmitoyl Tripeptide-1
- 32Palmitoyl Tetrapeptide-7
17 of 32 sit below the line, marked by Carbomer. Including what it is sold on: Retinal.
Medik8 Crystal Retinal 6
ordered for its first 32%
- 1Aqua (Water)
- 2Caprylic/Capric Triglyceride
- 3Glycerin
- 4Isododecane
- 5Cetearyl Olivate
- 6Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
- 7Cetearyl Alcohol
- 8PPG-12/SMDI Copolymer
- 9Sorbitan Olivate
- 10Tocopheryl Acetate
- 11Titanium Dioxide
- 12Eclipta Prostrata Extract
- 13Cyclodextrin
- 14Squalane
- 15Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
- 16Phenoxyethanol
- 17Melia Azadirachta Leaf Extract
- 18Hydroxypropyl Methylcellulose
- 19Sodium Hyaluronate
- 20Tetrahexyldecyl Ascorbate
- 21Rubus Chamaemorus (Cloudberry) Seed Oil
- 22Alumina
- 23Isostearic Acid
- 24Lecithin
- 25Polyglyceryl-3 Polyricinoleate
- 26Polyhydroxystearic Acid
- 27Stearic Acid
- 28Pentylene Glycol
- 29Retinal
- 30Moringa Oleifera Seed Oil
- 31Sodium Polyaspartate
- 32Climbazole
- 33Disodium EDTA
- 34Lonicera Japonica (Honeysuckle) Flower Extract
- 35Lonicera Caprifolium (Honeysuckle) Flower Extract
- 36Daucus Carota Sativa (Carrot) Seed Oil
- 37Ethylhexylglycerin
- 383-O-Ethyl Ascorbic Acid
- 39Dipteryx Odorata (Tonka) Bean Extract
- 40Hydroxyacetophenone
- 41Polysorbate 60
- 42Sorbitan Isostearate
- 43Vanilla Planifolia (Vanilla) Fruit Extract
- 44Decylene Glycol
- 451,2-Hexanediol
- 46BHT
- 47Coumarin
32 of 47 sit below the line, marked by Phenoxyethanol. Including what it is sold on: Retinal.
Below the line is not too little to work: ceramides, retinoids and peptides all act far under a percent. It means the position stops carrying information. Where the line falls is inferred from the first ingredient whose whole job is done at a fraction of a percent, so it is a close read of the label rather than a number from the formula sheet.
The molecule doing the work
Better for…
- Dark spots & uneven toneThe Vita A Retinal Shot Tightening Booster
- Fine lines & firmnessEither works
- Breakouts & congestionThe Vita A Retinal Shot Tightening Booster
- Dryness & dehydrationEither works
- Sensitive, reactive skinThe Vita A Retinal Shot Tightening Booster
Who each suits
- Celimax The Vita A Retinal Shot Tightening Booster
- dry, combination, oily, sensitive, normal · avoid with very sensitive skin, breastfeeding, compromised barrier and pregnancy
- Medik8 Crystal Retinal 6
- dry, combination, oily, normal · avoid with very sensitive skin, acne-prone skin (at high strength), breastfeeding and compromised barrier
Celimax The Vita A Retinal Shot Tightening Booster is the cheaper of the two (~$22 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.
Pure vitamin C and retinoids prefer different pH levels, so layered together they can be a little less effective and more irritating. Vitamin C in the morning is a convention, not a measured rule; the retinoid in the evening is what the labels say.
Keep vitamin C for mornings and the retinoid for evenings.
Common questions
Is Celimax The Vita A Retinal Shot Tightening Booster or Medik8 Crystal Retinal 6 better for dark spots & uneven tone?
For dark spots & uneven tone, Celimax The Vita A Retinal Shot Tightening Booster is the stronger pick by our read of the two formulas. Celimax The Vita A Retinal Shot Tightening Booster does more across the board (it leads on barrier repair, brightening / tone, oil-control & blemishes), while Medik8 Crystal Retinal 6 is the simpler, more pared-back pick. Reach for Celimax The Vita A Retinal Shot Tightening Booster if you want the actives; Medik8 Crystal Retinal 6 if you want fewer ingredients doing less, gently.
Which is cheaper, Celimax The Vita A Retinal Shot Tightening Booster or Medik8 Crystal Retinal 6?
Celimax The Vita A Retinal Shot Tightening Booster is the cheaper of the two (~$22 vs ~€86).
Can I use Celimax The Vita A Retinal Shot Tightening Booster and Medik8 Crystal Retinal 6 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. Celimax The Vita A Retinal Shot Tightening Booster is placed by Glycerin (the stratum corneum), Niacinamide (the living epidermis), Retinal (the living epidermis). Medik8 Crystal Retinal 6 is placed by Glycerin (the stratum corneum), Retinal (the living epidermis), Squalane (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…
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