Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

ZO Skin Health Daily Power Defense Versus Origins Plantscription Multi-Powered Youth Serum

ZO Skin Health Daily Power Defense Versus Origins Plantscription Multi-Powered Youth Serum This barrier-repair moisturizer is formulated around Laminaria Digitata Extract and Beta-Glucan to strengthen the skin barrier and hydrate skin. This anti-aging serum is

ZO Skin Health Daily Power Defense Versus Origins Plantscription Multi-Powered Youth Serum

This barrier-repair moisturizer is formulated around Laminaria Digitata Extract and Beta-Glucan to strengthen the skin barrier and hydrate skin.

This anti-aging serum is formulated around Niacinamide and Acetyl Hexapeptide-8 to soften the look of wrinkles and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Dicaprylyl Carbonate

Cetearyl Isononanoate

Glycerin

Pentylene Glycol

Cetearyl Alcohol

Steareth-20

Safflower Oil/Palm Oil Aminopropanediol Esters

Laminaria Digitata Extract

Opuntia Ficus-Indica Stem Extract

Arabidopsis Thaliana Extract

Marrubium Vulgare Meristem Cell Culture

Leontopodium Alpinum Meristem Cell Culture

Retinyl Palmitate

Tocopheryl Acetate

Tocopherol

Micrococcus Lysate

Caprylyl Glycol

Hexylene Glycol

Lactose

Galactoarabinan

Lecithin

Schizophyllan

Beta-Glucan

1,2-Hexanediol

Carbomer

Cellulose

Maltodextrin

C14-22 Alcohols

Cetearyl Glucoside

C12-20 Alkyl Glucoside

Hydroxypropyl Methylcellulose

Disodium EDTA

Sodium Hydroxide

Phenoxyethanol

Ethylhexylglycerin

Sodium Benzoate

Parfum

CI 77007

Limonene

Water, Dicaprylyl Carbonate, Cetearyl Isononanoate, Glycerin, Pentylene Glycol, Cetearyl Alcohol, Steareth-20, Safflower Oil/Palm Oil Aminopropanediol Esters, Laminaria Digitata Extract, Opuntia Ficus-Indica Stem Extract, Arabidopsis Thaliana Extract, Marrubium Vulgare Meristem Cell Culture, Leontopodium Alpinum Meristem Cell Culture, Retinyl Palmitate, Tocopheryl Acetate, Tocopherol, Micrococcus Lysate, Caprylyl Glycol, Hexylene Glycol, Lactose, Galactoarabinan, Lecithin, Schizophyllan, Beta-Glucan, 1,2-Hexanediol, Carbomer, Cellulose, Maltodextrin, C14-22 Alcohols, Cetearyl Glucoside, C12-20 Alkyl Glucoside, Hydroxypropyl Methylcellulose, Disodium EDTA, Sodium Hydroxide, Phenoxyethanol, Ethylhexylglycerin, Sodium Benzoate, Parfum, CI 77007, Limonene

Butylene Glycol

Niacinamide

Heptyl Undecylenate

Octyldodecanol

Glycereth-26

Sodium Acrylates Copolymer

Algae Extract

Illicium Verum Fruit/Seed Oil

Citrus Aurantium Bergamia Fruit Oil

Pelargonium Graveolens Flower Oil

Lavandula Angustifolia Oil

Citrus Limon Peel Oil

Litsea Cubeba Fruit Oil

Citrus Nobilis Peel Oil

Myristica Fragrans Kernel Oil

Citrus Aurantium Dulcis Oil

Rosa Damascena Flower Oil

Hibiscus Abelmoschus Extract

Carthamus Tinctorius Seed Oil

Linalool

Geraniol

Citronellol

Anogeissus Leiocarpus Bark Extract

Acetyl Hexapeptide-8

Palmitoyl Tripeptide-1

Acetyl Octapeptide-3

Palmitoyl Tetrapeptide-7

Palmitoyl Hexapeptide-12

Dipeptide Diaminobutyroyl Benzylamide Diacetate

Sodium Hyaluronate

Sigesbeckia Orientalis Extract

Commiphora Mukul Resin Extract

Laminaria Saccharina Extract

Glucosamine Hcl

Bambusa Vulgaris Extract

Caffeine

Rosmarinus Officinalis Leaf Extract

Molasses Extract

Scutellaria Baicalensis Root Extract

Pyrus Malus Fruit Extract

Cucumis Sativus Fruit Extract

Pisum Sativum Extract

Caprylic/Capric Triglyceride

Xanthan Gum

PEG-8

Glyceryl Polymethacrylate

Polysorbate 20

Sodium Metabisulfite

Sodium Sulfite

Sodium Phytate

BHT

Potassium Sorbate

Water, Butylene Glycol, Niacinamide, Glycerin, Heptyl Undecylenate, Octyldodecanol, Glycereth-26, Sodium Acrylates Copolymer, Algae Extract, Illicium Verum Fruit/Seed Oil, Citrus Aurantium Bergamia Fruit Oil, Pelargonium Graveolens Flower Oil, Lavandula Angustifolia Oil, Citrus Limon Peel Oil, Litsea Cubeba Fruit Oil, Citrus Nobilis Peel Oil, Myristica Fragrans Kernel Oil, Citrus Aurantium Dulcis Oil, Rosa Damascena Flower Oil, Hibiscus Abelmoschus Extract, Carthamus Tinctorius Seed Oil, Linalool, Geraniol, Citronellol, Limonene, Anogeissus Leiocarpus Bark Extract, Acetyl Hexapeptide-8, Palmitoyl Tripeptide-1, Acetyl Octapeptide-3, Palmitoyl Tetrapeptide-7, Palmitoyl Hexapeptide-12, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Sodium Hyaluronate, Sigesbeckia Orientalis Extract, Commiphora Mukul Resin Extract, Laminaria Saccharina Extract, Glucosamine Hcl, Bambusa Vulgaris Extract, Caffeine, Rosmarinus Officinalis Leaf Extract, Molasses Extract, Tocopheryl Acetate, Scutellaria Baicalensis Root Extract, Pyrus Malus Fruit Extract, Cucumis Sativus Fruit Extract, Pisum Sativum Extract, Caprylic/Capric Triglyceride, Lecithin, Xanthan Gum, Caprylyl Glycol, Hexylene Glycol, PEG-8, Glyceryl Polymethacrylate, Carbomer, Polysorbate 20, Sodium Metabisulfite, Sodium Sulfite, Disodium EDTA, Sodium Phytate, BHT, Potassium Sorbate, Phenoxyethanol

Reviews

Be the first to review

Alternatives

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 is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.

Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.

Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).

Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture.

Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%.

It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier.

Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%.

A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions.

Disodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air.

This ingredient mainly works behind the scenes and helps with:

On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it.

One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin).

Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption.

You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Hexylene Glycol is a multitasker ingredient that works as a solvent, humectant, emulsifier, viscosity reducer, and preservative booster.

It is able to dissolve both water and oil-soluble ingredients to stabilize tricky actives and make products spread more easily.

As a humectant, it pulls water into the skin. But it's a pretty minor moisturizing ingredient compared to other humectants, like glycerin.

Interestingly, it can act as a mild penetration enhancer. One in vitro study on human skin found a 12% concentration upped the absorption of mometasone furoate (a medicinal ingredient used to treat inflammatory skin conditions) up to 7%.

This ingredient is typically used at levels of 0.1-10% depending on the role it's playing.

A patch test study on eczema patients didn't find a significant increase in irritation versus the control group, but the potential for irritation rises at higher concentrations.

Lecithin is a term for a group of substances found in the cell membranes of plants, animals, and humans. They are made up of phospholipids.

Thanks to its amphiphilic structure (water-loving head and oil-loving tail), it is a true multitasker:

It plays well with most ingredients and is typically used at 0.1-1%. However, concentrations up to 50% have been reported in moisturizers.

Limonene is a fragrance that adds scent and taste to a formulation.

It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".

Limonene acts as an antioxidant, meaning it helps neutralize free radicals.

When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.

The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.

Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).

It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.

On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.

Another perk of this ingredient is that it stays functional across a wide pH range (3-10).

You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.

Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.

Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.

Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.

Tocopheryl Acetate is a stable, shelf-friendly form of vitamin E.

Formulators love it because plain vitamin E oxidizes quickly once it hits air. This acetate version stays stable and resists going off, helping to extend a product's shelf life.

It's actually inactive on its own and works like a slow-release "storage" form; the enzymes in your skin called esterases gradually convert it into active vitamin E over time.

One in vivo study showed 5% of the acetate in the living layer of the epidermis converted to vitamin E after 5 days of application. This study also found the skin gained protection against UV damage even though the conversion was slow and small.

Once converted, vitamin E acts as a skin's main fat-soluble antioxidant that fights free radicals to protect skin from damage.

Topical vitamin E generally boosts the skin's photoprotection, and it reduced UV-damage in animal models.

This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.

Overall, it has a pretty solid safety profile and has been found to be non-irritating and non-comedogenic. Allergic reactions may happen but stay rare due to how widely the ingredient gets used.

The concentration will vary depending on the formula; industry data shows 0.1% in baby lotions, 3% in lipsticks, and 5% in foot powders. You can also find this ingredient at 100% in a pure vitamin E oil.

Most leave-on skincare keeps it at the lower end, often between 0.5-1%.

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

03

Comparison edit

Read side by side