The Ordinary Hyaluronic Acid 2% + B5 Versus The Purest Solutions Niacinamide 5% + Zinc PCA 1%
Updated on January 14, 2025
Overview
What they are
These products are both vegan, cruelty-free, fungal acne (malassezia) safe, and reef safe . They have a total of 7 ingredients in common
Cool Features
They both contain hyaluronic acid
Suited For
They're both likely to be good for dry skin, brightening skin, sensitive skin and scar healing
Free From
They both do not contain any common allergens, fragrances, oils, parabens, silicones or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
The Ordinary Hyaluronic Acid 2% + B5 17 ingredients
The Purest Solutions Niacinamide 5% + Zinc PCA 1% 25 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
The Ordinary Hyaluronic Acid 2% + B5 17 ingredients
The Purest Solutions Niacinamide 5% + Zinc PCA 1% 25 ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningSodium Hyaluronate
Humectant
Pentylene Glycol
Skin ConditioningPropanediol
Solvent
Sodium Hyaluronate Crosspolymer
Humectant
Panthenol
Skin Conditioning
Ahnfeltia Concinna Extract
Skin ConditioningGlycerin
Humectant
Trisodium Ethylenediamine Disuccinate
Citric Acid
Buffering
Isoceteth-20
Emulsifying
Ethoxydiglycol
HumectantEthylhexylglycerin
Skin ConditioningHexylene Glycol
Emulsifying1,2-Hexanediol
Skin Conditioning
Phenoxyethanol
Preservative
Caprylyl Glycol
EmollientWater, Sodium Hyaluronate, Pentylene Glycol, Propanediol, Sodium Hyaluronate Crosspolymer, Panthenol, Ahnfeltia Concinna Extract, Glycerin, Trisodium Ethylenediamine Disuccinate, Citric Acid, Isoceteth-20, Ethoxydiglycol, Ethylhexylglycerin, Hexylene Glycol, 1,2-Hexanediol, Phenoxyethanol, Caprylyl Glycol
Water
Skin ConditioningNiacinamide
Smoothing
Glycerin
Humectant
Phenethyl Alcohol
MaskingZinc PCA
Humectant
Hydroxyethylcellulose
Emulsion Stabilising1,2-Hexanediol
Skin Conditioning
Salix Purpurea Bark Extract
Skin ConditioningButylene Glycol
Humectant
Triethanolamine
BufferingSodium Acetate
BufferingSodium PCA
Humectant
Isopropyl Alcohol
Solvent
Pentylene Glycol
Skin ConditioningCellulose
AbsorbentErythritol
Humectant
Lactic Acid
Buffering
Carrageenan
Phellodendron Amurense Bark Extract
Skin ConditioningSodium Acetylated Hyaluronate
Humectant
Xanthan Gum
EmulsifyingSodium Hyaluronate
Humectant
Sodium Hyaluronate Crosspolymer
Humectant
Hydrolyzed Sodium Hyaluronate
Skin Conditioning
Ethylhexylglycerin
Skin ConditioningWater, Niacinamide, Glycerin, Phenethyl Alcohol, Zinc PCA, Hydroxyethylcellulose, 1,2-Hexanediol, Salix Purpurea Bark Extract, Butylene Glycol, Triethanolamine, Sodium Acetate, Sodium PCA, Isopropyl Alcohol, Pentylene Glycol, Cellulose, Erythritol, Lactic Acid, Carrageenan, Phellodendron Amurense Bark Extract, Sodium Acetylated Hyaluronate, Xanthan Gum, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate, Ethylhexylglycerin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Â
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesÂ
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.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinPentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can also help thicken or stabilize a product.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolSodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateSodium Hyaluronate Crosspolymer is a type of hyaluronic acid. In fact, it is modified version of hyaluronic acid.
The structure of Sodium Hyaluronate Crosspolymer allows it to stay in the skin's top layer for a longer period of time. This allows for even more hydration and humectant action than hyaluronic acid.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium Hyaluronate CrosspolymerWater. 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. Stay hydrated!
Learn more about WaterIngredient Ratings
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When to use
The Ordinary Hyaluronic Acid 2% + B5 17 ingredients
The Purest Solutions Niacinamide 5% + Zinc PCA 1% 25 ingredients
Reviews
Here's what our community thinks
