Versus

Le Mieux Collagen Peptide Serum Versus Medik8 Liquid Peptides

Serum

American Brand

British Brand

Overview

What they are

These products are both cruelty-free and reef safe serums. They have a total of 5 ingredients in common

Cool Features

They both contain hyaluronic acid and peptides

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture

Free From

They both do not contain any harsh alcohols, common allergens, oils, parabens, silicones or sulfates

What's Inside

They both contain fragrances

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.

New Comparison

Ingredient Info

Click any item below to learn more and see relevant ingredients

Le Mieux Collagen Peptide Serum 37 ingredients

Medik8 Liquid Peptides 33 ingredients

What's inside (and what isn't)

At a glance

Click on any of the items below to learn more

Le Mieux Collagen Peptide Serum 37 ingredients

Medik8 Liquid Peptides 33 ingredients

Key Ingredients

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products

Collagen Peptide Serum

Hyaluronic Acid

Humectant

Acetyl Tetrapeptide-2

Skin Conditioning

Palmitoyl Tripeptide-1

Skin Conditioning

Palmitoyl Tetrapeptide-7

Skin Conditioning

Palmitoyl Pentapeptide-4

Skin Conditioning

Palmitoyl Tripeptide-5

Skin Conditioning

Acetyl Octapeptide-3

Humectant

Oryza Sativa Bran Water

Masking

Epigallocatechin Gallatyl Glucoside

Antioxidant

Camellia Sinensis Leaf Extract

Antimicrobial

Hydrolyzed Avocado Protein

Skin Conditioning

Glycine Soja Seed Extract

Skin Conditioning

Teprenone

Skin Conditioning

Caprylic/Capric Triglyceride

Ceramide Ns

Ceramide NP

Tocotrienols

Brassica Campestris Sterols

Emollient

Butyrospermum Parkii Butter

Skin Conditioning

Sodium Palmitoyl Proline

Skin Conditioning

Nymphaea Alba Flower Extract

Skin Conditioning

Malus Domestica Fruit Cell Culture Extract

Skin Conditioning

Dipalmitoyl Hydroxyproline

Skin Conditioning

Sodium Carboxymethyl Beta-Glucan

Cleansing

Superoxide Dismutase

Antioxidant

Glucosamine Hcl

Laminaria Digitata Extract

Skin Protecting

Saccharomyces Cerevisiae Extract

Skin Conditioning

Sodium PCA

Humectant

0 / 0 Helps hydrate Dry Skin Icon

Enteromorpha Compressa Extract

Skin Protecting

Urea

Buffering

Retinyl Palmitate

Skin Conditioning

1-3 / 1-3 Retinoid Icon

Isomalt

Caprylyl Glycol

Ethylhexylglycerin

Undecylenoyl Glycine

Capryloyl Glycine

Hyaluronic Acid, Acetyl Tetrapeptide-2, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Palmitoyl Pentapeptide-4, Palmitoyl Tripeptide-5, Acetyl Octapeptide-3, Oryza Sativa Bran Water, Epigallocatechin Gallatyl Glucoside, Camellia Sinensis Leaf Extract, Hydrolyzed Avocado Protein, Glycine Soja Seed Extract, Teprenone, Caprylic/Capric Triglyceride, Ceramide Ns, Ceramide NP, Tocotrienols, Brassica Campestris Sterols, Butyrospermum Parkii Butter, Sodium Palmitoyl Proline, Nymphaea Alba Flower Extract, Malus Domestica Fruit Cell Culture Extract, Dipalmitoyl Hydroxyproline, Sodium Carboxymethyl Beta-Glucan, Superoxide Dismutase, Glucosamine Hcl, Laminaria Digitata Extract, Saccharomyces Cerevisiae Extract, Sodium PCA, Enteromorpha Compressa Extract, Urea, Retinyl Palmitate, Isomalt, Caprylyl Glycol, Ethylhexylglycerin, Undecylenoyl Glycine, Capryloyl Glycine

Liquid Peptides

Water

Skin Conditioning

Glycerin

Humectant

0 / 0 Helps hydrate Dry Skin Icon

Butylene Glycol

Humectant

1 / 0 Helps hydrate Dry Skin Icon

Inulin

Skin Conditioning

Sodium Hyaluronate

Humectant

0 / 0 Hyaluronic Acid Icon

Panthenol

Skin Conditioning

0 / 0 Helps hydrate Dry Skin Icon

Alpha-Glucan Oligosaccharide

Carnosine

Carbomer

Polysorbate 20

0 / 0 Not safe for Fungal Acne Icon

Caprylyl Glycol

Emollient

Phenoxyethanol

Preservative

Hydroxypropyl Cyclodextrin

Masking

Dunaliella Salina Extract

Skin Conditioning

Ethylhexylglycerin

Skin Conditioning

Citric Acid

Buffering

Palmitoyl Tripeptide-5

Sodium Benzoate

Acetyl Hexapeptide-8

Tetrapeptide-21

Pentapeptide-18

Palmitoyl Tripeptide-1

Skin Conditioning

Pantolactone

Humectant

Palmitoyl Tripeptide-38

Skin Conditioning

Palmitoyl Tetrapeptide-7

Skin Conditioning

Glyceryl Caprylate

Emollient

Lactic Acid/Glycolic Acid Copolymer

Skin Conditioning

Polyvinyl Alcohol

Phenylpropanol

Masking

Copper Palmitoyl Heptapeptide-14

Skin Conditioning

Heptapeptide-15 Palmitate

Skin Conditioning

Potassium Sorbate

Preservative

Xanthan Gum

Emulsifying

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Caprylyl Glycol

Emollient, Humectant, Skin Conditioning

Caprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.

It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.

Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.

This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.

Learn more about Caprylyl Glycol

Ethylhexylglycerin

Skin Conditioning

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.

Palmitoyl Tetrapeptide-7

Skin Conditioning

Palmitoyl Tetrapeptide-7 is a lab-made peptide with anti-inflammatory and skin-repairing benefits. It's made up of four amino acids (glycine, glutamine, proline, and arginine) and palmitic acid (which helps it penetrate skin more effectively).

This ingredient helps reduce inflammation by limiting the production of interleukin-6 (IL-6), a chemical that triggers inflammatory responses, particularly after UV exposure.

Less inflammation = slower collagen breakdown and a longer-lasting, youthful appearance.

Palmitoyl Tetrapeptide-7 also stimulates collagen production and supports a healthier skin barrier.

Over time, this can improve skin firmness, hydration, and reduce the appearance of fine lines. It’s commonly paired with Palmitoyl Tripeptide-1 in the well-known Matrixyl 3000 complex for enhanced anti-aging effects.

This ingredient has been shown to be effective and safe in cosmetic use and you'll typically find it in small amounts (less than 0.01%).

Due to its palmitic acid base, it may not be safe for Malassezia folliculitis.

Read more about other common types of peptides here:

Learn more about Palmitoyl Tetrapeptide-7

Palmitoyl Tripeptide-1

Skin Conditioning

Palmitoyl Tripeptide-1 is also known as pal-GHK. It is made up of 3 amino acids and palmitic acid, a fatty acid that helps it absorb into skin more easily.

This peptide is as a signal peptide, meaning it tells the skin to produce more collagen. Collagen is the key protein that helps form the skin's structure and keep it plump, firm, and hydrated.

By boosting collagen production, this ingredient supports a stronger skin barrier and helps reduce the appearance of wrinkles.

You'll most likely see this ingredient paired with Palmitoyl Tetrapeptide-7 in the well-known Matrixyl 3000 complex. While results from in-house testing should be viewed cautiously, this peptide duo is among the most studied and widely used in modern skincare.

Due to its palmitic acid base, this ingredient may not be safe for Malassezia folliculitis.

Read more about other common types of peptides here:

Learn more about Palmitoyl Tripeptide-1

Palmitoyl Tripeptide-5

Skin Conditioning

This synthetic peptide is created from lysine, valine, and palmitic acid.

According to the manufacturer, in-vitro studies show tissue growth and collagen synthesis. Another in-vivo study found 60 volunteers saw a significant reduction in wrinkles after 84 days.

Due to its palmitic acid base, this peptide may not be fungal-acne safe.

Learn more about Palmitoyl Tripeptide-5