Head to head
Celimax The Vita A Retinal Shot Tightening Booster vs Medik8 Liquid Peptides
Same comparison whichever way you searched it: Medik8 Liquid Peptides 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 brightening / tone, oil-control & blemishes, anti-aging), while Medik8 Liquid Peptides is the simpler, more pared-back pick.
Reach for Celimax The Vita A Retinal Shot Tightening Booster if you want the actives; Medik8 Liquid Peptides if you want fewer ingredients doing less, gently.
Medik8 Liquid Peptides keeps clear of pregnancy-flagged actives, while Celimax The Vita A Retinal Shot Tightening Booster carries one that is best paused in pregnancy.
Answer nine questions and the app picks between them for your skin.
CelimaxThe Vita A Retinal Shot Tightening BoosterSee every ingredient in The Vita A Retinal Shot Tightening Booster, decoded
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
€0.35 an applicationabout 150 uses from 30 ml
a usual amount, not a measured dose: 3-5 drops, about 0.2 ml; from €52 as read in September 2026 and a 30 ml pack.
how this is counted
About €0.35 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 €0.35.
Which should you pick?
Pick The Vita A Retinal Shot Tightening Booster if
- dark spots, dullness or an uneven tone are your focus
- you are dealing with breakouts and oiliness
- you want the more affordable option
Pick Liquid Peptides if
- you are pregnant or breastfeeding
What each delivers
Side by side
| The Vita A Retinal Shot Tightening Booster | Liquid Peptides | |
|---|---|---|
| Type | Serum | Serum |
| Key actives | Glycerin, Niacinamide, Retinal | Glycerin, Hyaluronic acid, Pro-vitamin B5 |
| Texture | A light, fast-absorbing texture that layers cleanly under the rest of your routine, with no greasy film. | A light, fast-absorbing texture that layers cleanly under the rest of your routine, with no greasy film. |
| Fragrance | None detected | None detected |
| Feeds Malassezia | 3 measured / 2 inferred | 1 measured / none inferred |
| Pregnancy | One caution | No flagged actives |
| Ingredients | 32 listed | 35 listed |
| Price | ~$22 | ~€52 |
What's in one but not the other
The two labels share 9 of the 58 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 Liquid Peptides. 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 Liquid Peptides
Medik8 Liquid Peptides is a different bottle only for: hyaluronic acid, palmitoyl tripeptide-1, argireline, matrixyl synthe'6.
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 dropper bottle and nothing on this label that light breaks; the period after opening not read yet.
Medik8 Liquid Peptides is the one to keep if you use it slowly: a dropper bottle, nothing on this label that light breaks.
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 Liquid Peptides
ordered for its first 54%
- 1Aqua (Water)
- 2Glycerin
- 3Butylene Glycol
- 4Palmitoyl Tetrapeptide-7
- 5Palmitoyl Tripeptide-1
- 6Copper Heptapeptide-14 Pantothenate
- 7Heptapeptide-15 Palmitate
- 8Arginine/Lysine Polypeptide
- 9Palmitoyl Tripeptide-38
- 10Carnosine
- 11Acetyl Hexapeptide-8
- 12Pentapeptide-18
- 13Palmitoyl Tripeptide-5
- 14Tetrapeptide-21
- 15Sodium Hyaluronate
- 16Inulin
- 17Alpha-Glucan Oligosaccharide
- 18Lactic Acid/Glycolic Acid Copolymer
- 19Panthenol
- 20Ethylhexylglycerin
- 21Hydroxypropyl Cyclodextrin
- 22Dunaliella Salina (Green Algae) Extract
- 23Polysorbate 20
- 24Caprylyl Glycol
- 25Citric Acid
- 26Glyceryl Caprylate
- 27Pantolactone
- 28Phenylpropanol
- 29Polyvinyl Alcohol
- 30Carbomer
- 31Potassium Sorbate
- 32Sodium Benzoate
- 33Sorbic Acid
- 34Phenoxyethanol
- 35Xanthan Gum
16 of 35 sit below the line, marked by Ethylhexylglycerin.
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 & firmnessThe Vita A Retinal Shot Tightening Booster
- Breakouts & congestionThe Vita A Retinal Shot Tightening Booster
- Dryness & dehydrationEither works
- Sensitive, reactive skinLiquid Peptides
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 Liquid Peptides
- dry, combination, normal
Celimax The Vita A Retinal Shot Tightening Booster is the cheaper of the two (~$22 vs ~€52).
Ready to pick one?
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Common questions
Is Celimax The Vita A Retinal Shot Tightening Booster or Medik8 Liquid Peptides 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 brightening / tone, oil-control & blemishes, anti-aging), while Medik8 Liquid Peptides is the simpler, more pared-back pick. Reach for Celimax The Vita A Retinal Shot Tightening Booster if you want the actives; Medik8 Liquid Peptides if you want fewer ingredients doing less, gently. Medik8 Liquid Peptides keeps clear of pregnancy-flagged actives, while Celimax The Vita A Retinal Shot Tightening Booster carries one that is best paused in pregnancy.
Which is cheaper, Celimax The Vita A Retinal Shot Tightening Booster or Medik8 Liquid Peptides?
Celimax The Vita A Retinal Shot Tightening Booster is the cheaper of the two (~$22 vs ~€52).
Can I use Celimax The Vita A Retinal Shot Tightening Booster and Medik8 Liquid Peptides 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.
Compare it with…
41 duels are built for this serum, Geek & Gorgeous A-Game 10 and La Roche-Posay Hyalu B5 Suractivated Serum among them: type a name, or pick one below.