1st on the list, which puts it at an estimated 30–80% of the formula.
Maris Aqua (EU)
Isntree
Ultra-Low Molecular Hyaluronic Acid Serum
face serum
Isntree
face serum
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
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Take the skin testThe Isntree Ultra-Low Molecular Hyaluronic Acid Serum is a lightweight, vegan serum that delivers deep hydration and soothing benefits to the skin. Infused with 14 types of hyaluronic acid and enriched with deep seawater from Ulleung Island, Korea, this serum ensures long-lasting moisture retention. The formulation includes Glyceryl Glucoside to activate water channels, providing rich hydration, while Beta-Glucan strengthens the moisture barrier. Ideal for all skin types, it leaves the skin feeling deeply hydrated, smooth, and refreshed.
Ultra-Low Molecular Hyaluronic Acid Serum is a watery-light serum from Isntree. The formula is built mainly around hydration. The ingredient list runs to 30 ingredients, each broken down in full below.
By its ingredient list the formula reads as very light — essentially a water-and-humectant base with little emollient weight. With almost no emollient load it should absorb quickly and finish close to matte. Hydration is handled by Methylpropanediol, Glycerin and Butylene Glycol, humectants that pull water into the upper layers of skin rather than sealing it there.
Hydration: Very high. Ingredients that pull and hold water in the upper layers of skin, and here that comes from Methylpropanediol, Glycerin, Butylene Glycol and Betaine.
Soothing: Moderate. Ingredients aimed at visible redness and reactivity, and here that comes from Allantoin, Panthenol, Madecassoside and Beta-glucan.
On richness alone it suits Combination (oily) and Oily skin best, and is the least natural fit for Dry, Combination (dry) and Balanced skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.
The formula contributes little or nothing on antioxidant protection, oil control, brightening and tone and cell renewal. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.
Reading the full list, the formula is fragrance-free, essential-oil-free, no drying alcohol, paraben-free, silicone-free and microplastic-free. Those claims come from the ingredient list itself, not from the packaging.
It can be used morning and evening. In a routine it goes after toner, before moisturiser. Apply to clean, dry skin and give it a minute to absorb before the next layer. Introduce one new treatment at a time so you can identify what is working.
This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.
Drawn purely from the ingredient list
Scored on how rich or light the formula reads from its INCI order.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
Based on the curated benefits documented for this product's ingredients.
Attracts and locks in moisture to keep skin plump and dewy
Calms redness, irritation, and inflammation for sensitive skin
Boosts collagen and cell turnover to reduce fine lines and wrinkles
None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.
The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.
1st on the list, which puts it at an estimated 30–80% of the formula.
Maris Aqua (EU)
2nd on the list, which puts it at an estimated 5–20% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
3rd on the list, which puts it at an estimated 5–20% of the formula.
2-Methyl-1,3-propanediol
4th on the list, which puts it at an estimated 2–10% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
5th on the list, which puts it at an estimated 2–10% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
7th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Methanaminium, 1-carboxy-N,N,N-trimethyl-, hydroxide, inner salt
8th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Dihydroxypentane
11th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Urea, (2,5-dioxo-4-imidazolidinyl)-
13th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Propanediol, 3-(2-ethylhexyloxy)
15th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
16th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Malachite Extract is an extract of Malachite obtained by grinding the stone, subsequent solubilization by hydrochloric acid and neutralization by sodium bicarbonate
17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
Each axis is scored from the ingredients present and how high up the list they sit.
Ingredients that pull and hold water in the upper layers of skin
Lipids and repair signals that support skin barrier integrity
Ingredients that mop up free radicals from UV and pollution
Ingredients that moderate sebum or absorb shine
Ingredients that act on uneven tone and post-inflammatory marks
Ingredients aimed at visible redness and reactivity
Retinoids, acids and enzymes that speed surface turnover
Peptides and growth factors that signal for collagen support
"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.
Solvents, emollients, texture agents and preservatives — the formula that carries the actives.
Read from the full ingredient list. A brand's own claim may differ.
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Nothing in this formula belongs to a group our rules can put in conflict, so it layers freely. Order still matters — thinnest texture first.
This product is the "Treat" step.
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
Most ingredients do more than one job, so these counts add up to more than the 30 ingredients on the label.
Draws water into the upper layers of skin
Changes how skin behaves rather than how it feels
Dissolves and carries everything else
Sets the thickness, spread and stability of the formula
Forms a film that slows water loss
Neutralises free radicals from UV and pollution
Calms visible redness and irritation
Softens and smooths by filling gaps between skin cells
Binds trace metals that would otherwise spoil the formula
Sets the acidity the formula needs to work
Botanical material, usually for antioxidants or scent
Lifts oil and dirt, or holds oil and water together
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
1st on the list, which puts it at an estimated 30–80% of the formula.
Maris Aqua (EU)
2nd on the list, which puts it at an estimated 5–20% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
3rd on the list, which puts it at an estimated 5–20% of the formula.
2-Methyl-1,3-propanediol
4th on the list, which puts it at an estimated 2–10% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
5th on the list, which puts it at an estimated 2–10% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
6th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
7th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Methanaminium, 1-carboxy-N,N,N-trimethyl-, hydroxide, inner salt
8th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Dihydroxypentane
9th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Propenoic acid, polymer with 2,2-bis(hydroxymethyl)propane-1,3-diol 2-propenyl ether
10th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Octane-1,2-diol
11th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Urea, (2,5-dioxo-4-imidazolidinyl)-
12th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,3-Propanediol, 2-amino-2-(hydroxymethyl)-
13th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Propanediol, 3-(2-ethylhexyloxy)
14th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Xanthan gum
15th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
16th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Malachite Extract is an extract of Malachite obtained by grinding the stone, subsequent solubilization by hydrochloric acid and neutralization by sodium bicarbonate
17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
18th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Disodium dihydrogen ethylenediaminetetraacetate
19th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glyceryl Acrylate/Acrylic Acid Copolymer is a copolymer of glyceryl acrylate and acrylic acid
20th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
alpha-D-Glucopyranoside, 2-Hydroxy-1-(Hydroxymethyl)ethyl
21st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid, sodium, salt
22nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid, potassium salt
23rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid
24th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hydrolyzed Sodium Hyaluronate is the hydrolysate of Sodium Hyaluronate derived by acid, enzyme or other method of hydrolysis
25th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Sodium Acetylhyaluronate
26th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid, 2-hydroxy-3-(N,N,N-trimethylammonio)propyl chloride derivatives
27th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Hyaluronic acid, sodium salt, polymer with 1,1'-sulfonylbis[ethene]
28th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Dimethylsilanol Hyaluronate is the ester of dimethylsilanol and hyaluronic acid.
29th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
O-6-Deoxy-α-L-mannopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl (2α,3β,4α,6β)-2,3,6,23-tetrahydroxyurs-12-en-28-oate
30th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
beta-Glucan is a polysaccharide consisting of b(1-3) linked glucose chains carrying b(1-6) linked glucose sidechains
Products in the same category that share this formula's distinguishing ingredients.
Eqqualberry
Shares 15 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Glycerin, Betaine, Panthenol
COSRX
Shares 14 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Pentylene Glycol, Glycerin, Betaine
Eqqualberry
Shares 14 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Glycerin, Betaine, Sodium Hyaluronate
Torriden
Shares 14 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Glycerin, Panthenol, Allantoin
Anua
Shares 14 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Glycerin, Ethylhexylglycerin, Allantoin
Eqqualberry
Shares 14 key ingredients with Ultra-Low Molecular Hyaluronic Acid Serum: Water, Butylene Glycol, Glycerin, Betaine, Sodium Hyaluronate
SEA WATER, WATER, METHYLPROPANEDIOL, GLYCERIN, BUTYLENE GLYCOL, 1,2-HEXANEDIOL, BETAINE, PENTYLENE GLYCOL, CARBOMER, CAPRYLYL GLYCOL, ALLANTOIN, TROMETHAMINE, ETHYLHEXYLGLYCERIN, XANTHAN GUM, PANTHENOL, MALACHITE EXTRACT, HYDROLYZED HYALURONIC ACID, DISODIUM EDTA, GLYCERYL ACRYLATE/ACRYLIC ACID COPOLYMER, GLYCERYL GLUCOSIDE, SODIUM HYALURONATE, POTASSIUM HYALURONATE, HYALURONIC ACID, HYDROLYZED SODIUM HYALURONATE, SODIUM ACETYLATED HYALURONATE, HYDROXYPROPYLTRIMONIUM HYALURONATE, SODIUM HYALURONATE CROSSPOLYMER, DIMETHYLSILANOL HYALURONATE, MADECASSOSIDE, BETA-GLUCAN.
PANTHENOL, HYDROLYZED HYALURONIC ACID, SODIUM HYALURONATE, POTASSIUM HYALURONATE, HYALURONIC ACID, SODIUM ACETYLATED HYALURONATE, SODIUM HYALURONATE CROSSPOLYMER.
After cleaning and toning the skin, apply a moderate amount to the skin, avoiding the eye and mouth areas. Gently pat for better absorption.
Judged on how rich the formula reads from its ingredient list, it suits Combination (oily), Oily skin best. It is the least natural fit for Dry, Combination (dry), Balanced skin.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
No ingredient in this formula is a recognised food source for malassezia, the yeast behind fungal acne.
Nothing in this formula is on the standard pregnancy-caution list. That is not medical clearance — check anything you use daily with your doctor or midwife.
Yes. Reading the full ingredient list, this formula is fragrance-free.
No. Reading the full ingredient list, this formula is no drying alcohol.
Yes. Reading the full ingredient list, this formula is silicone-free.
No. Reading the full ingredient list, this formula is essential-oil-free.
Yes. Reading the full ingredient list, this formula is paraben-free.
It layers well with Vitamin C (L-ascorbic acid), Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone), Benzoyl peroxide.
Use it morning and evening, after toner, before moisturiser.
It lists 30 ingredients, of which 7 are recorded as actives.
Isntree.
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