Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

The INKEY List Hydro-Surge Dewy Face Mist Versus Cocokind Calming Magnesium Mist

The INKEY List Hydro-Surge Dewy Face Mist Versus Cocokind Calming Magnesium Mist This hydrating toner is formulated around Cucumis Sativus Fruit Extract to hydrate skin and calm redness. This calming toner is formulated around Magnesium PCA and Zinc PCA to cal

The INKEY List Hydro-Surge Dewy Face Mist Versus Cocokind Calming Magnesium Mist

This hydrating toner is formulated around Cucumis Sativus Fruit Extract to hydrate skin and calm redness.

This calming toner is formulated around Magnesium PCA and Zinc PCA to calm redness and hydrate skin.

What's inside

Key Ingredients

No key ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Water

Glycerin

Cucumis Sativus Fruit Extract

Betaine

Xylitylglucoside

Maris Aqua

Phenoxyethanol

Anhydroxylitol

Xylitol

Citric Acid

Pentylene Glycol

Ethylhexylglycerin

Tetrasodium Glutamate Diacetate

Lactic Acid

Sodium Benzoate

Water, Glycerin, Cucumis Sativus Fruit Extract, Betaine, Xylitylglucoside, Maris Aqua, Phenoxyethanol, Anhydroxylitol, Xylitol, Citric Acid, Pentylene Glycol, Ethylhexylglycerin, Tetrasodium Glutamate Diacetate, Lactic Acid, Sodium Benzoate

Sea Silt Extract

Leuconostoc/Radish Root Ferment Filtrate

Magnesium PCA

Zinc PCA

Sodium PCA

Manganese PCA

Polylysine

Nelumbo Nucifera Flower Water

Nymphaea Caerulea Flower Water

Biosaccharide Gum-2

Maltodextrin

Potassium Sorbate

Sodium Gluconate

1,2-Hexanediol

Sodium Hydroxide

Water, Sea Silt Extract, Leuconostoc/Radish Root Ferment Filtrate, Glycerin, Magnesium PCA, Zinc PCA, Sodium PCA, Manganese PCA, Polylysine, Nelumbo Nucifera Flower Water, Nymphaea Caerulea Flower Water, Biosaccharide Gum-2, Maltodextrin, Ethylhexylglycerin, Citric Acid, Potassium Sorbate, Sodium Gluconate, Sodium Benzoate, 1,2-Hexanediol, Sodium Hydroxide

Reviews

Alternatives

Ingredients Explained

These ingredients are found in both products.

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

Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.

Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.

However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.

Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.

In skincare formulas, citric acid can:

While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.

Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.

Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.

However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.

Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:

The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.

Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.

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.

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

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.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 03Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken, emulsify, and improve the texture of products.
  4. 04As an emulsifier, it helps stabilize oil-in-water emulsions to give products an elegant feel when applied.
  5. 05It can also form a thin protective film on skin. One study found that a formula using this polymer helped slow down how quickly other ingredients (like DEET) were absorbed through skin.
  6. 06A 2024 study of over 1,300 patients confirmed that sensitization to this ingredient is rare. It is also non-mutagenic and has a clean track record.
  7. 07Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm).
  8. 08It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation.
  9. 09This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent.
  10. 10Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation.
  11. 11The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries.
  12. 12It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity.
  13. 13Overall, avobenzone is a safe and regulated ingredient used in sunscreen for over 40 years.
  14. 14Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.
  15. 15Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.
  16. 16It plays several roles in a formula:
  17. 17Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.
  18. 18Multiple assessments have found it to be non-irritating and non-sensitizing to most people.
  19. 19However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.
  20. 20Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side