Skin science article
Tula Skincare Triple-Hydra Complex Day & Night Serum Versus Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum
Tula Skincare Triple-Hydra Complex Day & Night Serum Versus Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum This hydrating serum is formulated around Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid to hydrate skin and strengthen the skin barrier.
Tula Skincare Triple-Hydra Complex Day & Night Serum Versus Kiehl's Ultra Pure High-Potency 1.5% Hyaluronic Acid Serum
This hydrating serum is formulated around Sodium Hyaluronate and Hydrolyzed Hyaluronic Acid to hydrate skin and strengthen the skin barrier.
This hydrating serum is formulated around Sodium Hyaluronate to hydrate skin and strengthen the skin barrier.
What's inside
Key Ingredients
Benefits
Concerns
No concerns
Ingredients Side-by-side
Water
Dipentaerythrityl Hexacaprylate/Hexacaprate
Pentaerythrityl Tetraisostearate
Isononyl Isononanoate
Propanediol
Glycerin
Caprylic/Capric Triglyceride
Sodium Hyaluronate
Hydrolyzed Hyaluronic Acid
Sodium Hyaluronate Crosspolymer
Hydrolyzed Sodium Hyaluronate
Sodium Acetylated Hyaluronate
Sodium Polyglutamate
Squalane
Collagen
Lactococcus Ferment Lysate
Lactobacillus Ferment
Lactobacillus
Beta Vulgaris Root Extract
Curcuma Longa Root Extract
Pyrus Malus Fruit Extract
Citrullus Lanatus Fruit Extract
Vaccinium Angustifolium Fruit Extract
Lens Esculenta Fruit Extract
Hydrolyzed Rice Protein
Inulin
Alpha-Glucan Oligosaccharide
Lactic Acid
Sodium PCA
Hydrogenated Poly(C6-20 Olefin)
Hydroxyacetophenone
Leuconostoc/Radish Root Ferment Filtrate
Polymnia Sonchifolia Root Juice
Rhus Verniciflua Peel Wax
Caprylyl Glycol
Sodium Lactate
Carrageenan
Pentylene Glycol
Maltodextrin
Butylene Glycol
Sodium Chloride
Ethylhexylglycerin
1,2-Hexanediol
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Tromethamine
Hdi/Trimethylol Hexyllactone Crosspolymer
Sodium Benzoate
Potassium Sorbate
Water, Dipentaerythrityl Hexacaprylate/Hexacaprate, Pentaerythrityl Tetraisostearate, Isononyl Isononanoate, Propanediol, Glycerin, Caprylic/Capric Triglyceride, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Sodium Polyglutamate, Squalane, Collagen, Lactococcus Ferment Lysate, Lactobacillus Ferment, Lactobacillus, Beta Vulgaris Root Extract, Curcuma Longa Root Extract, Pyrus Malus Fruit Extract, Citrullus Lanatus Fruit Extract, Vaccinium Angustifolium Fruit Extract, Lens Esculenta Fruit Extract, Hydrolyzed Rice Protein, Inulin, Alpha-Glucan Oligosaccharide, Lactic Acid, Sodium PCA, Hydrogenated Poly(C6-20 Olefin), Hydroxyacetophenone, Leuconostoc/Radish Root Ferment Filtrate, Polymnia Sonchifolia Root Juice, Rhus Verniciflua Peel Wax, Caprylyl Glycol, Sodium Lactate, Carrageenan, Pentylene Glycol, Maltodextrin, Butylene Glycol, Sodium Chloride, Ethylhexylglycerin, 1,2-Hexanediol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Hdi/Trimethylol Hexyllactone Crosspolymer, Sodium Benzoate, Potassium Sorbate
Phenoxyethanol
Chlorphenesin
Tetrasodium Glutamate Diacetate
Citric Acid
Water, Glycerin, Sodium Hyaluronate, Phenoxyethanol, Chlorphenesin, Tetrasodium Glutamate Diacetate, Citric Acid
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.
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 Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.
In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.
Interestingly, the size of the molecule affects its behavior:
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.
You'll typically see concentrations between 0.1-2% for this ingredient.
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!