The Purest Solutions Vita-A Rejuvenating Retinol Serum (1% Retinol + Ceramide) Versus The Purest Solutions Brightening & Lightening Vitamin C Serum 10% Ascorbic Acid & 0.5% Ferulic Acid
This anti-aging serum is formulated around Retinol and Acetyl Hexapeptide-8 to soften the look of wrinkles and refine skin texture.
This brightening serum is formulated around Ascorbic Acid and Ferulic Acid to brighten dull-looking skin and fade the look of dark spots.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Cyclopentasiloxane
Emollient
Dimethicone/Vinyl Dimethicone Crosspolymer
Skin Conditioning
Behenyl Alcohol
Emollient
Glyceryl Stearate
Emollient
Lecithin
Emollient
Glycine Soja Sterols
Emollient
Retinol
Skin Conditioning
Acetyl Hexapeptide-8
Humectant
Dimethicone
Emollient
Acmella Oleracea Extract
Skin ProtectingButyrospermum Parkii Butter
Skin Conditioning
Sodium Hyaluronate Crosspolymer
Humectant
Sodium Hyaluronate
Humectant
Sodium Acetylated Hyaluronate
Humectant
Hydrolyzed Sodium Hyaluronate
Skin Conditioning
3-O-Ethyl Ascorbic Acid
Skin Conditioning
Saccharide Isomerate
Humectant
Sodium PCA
Humectant
Ceramide NP
Skin Conditioning
Niacinamide
Smoothing
Phenethyl Alcohol
Masking1,2-Hexanediol
Skin Conditioning
Sodium Acrylates Copolymer
Tocopheryl Acetate
Antioxidant
Camellia Sinensis Leaf Extract
Antimicrobial
Xanthan Gum
EmulsifyingPEG-7 Glyceryl Cocoate
Emulsifying
Sodium Citrate
BufferingWater, Glycerin, Cyclopentasiloxane, Dimethicone/Vinyl Dimethicone Crosspolymer, Behenyl Alcohol, Glyceryl Stearate, Lecithin, Glycine Soja Sterols, Retinol, Acetyl Hexapeptide-8, Dimethicone, Acmella Oleracea Extract, Butyrospermum Parkii Butter, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Hydrolyzed Sodium Hyaluronate, 3-O-Ethyl Ascorbic Acid, Saccharide Isomerate, Sodium PCA, Ceramide NP, Niacinamide, Phenethyl Alcohol, 1,2-Hexanediol, Sodium Acrylates Copolymer, Tocopheryl Acetate, Camellia Sinensis Leaf Extract, Xanthan Gum, PEG-7 Glyceryl Cocoate, Sodium Citrate
Water
Skin ConditioningAscorbic Acid
Antioxidant
Glycerin
Humectant
Hydroxyethylcellulose
Emulsion StabilisingSodium Hyaluronate Crosspolymer
Humectant
Sodium Hyaluronate
Humectant
Sodium Acetylated Hyaluronate
Humectant
Hydrolyzed Sodium Hyaluronate
Skin Conditioning
Sodium PCA
Humectant
Erythritol
Humectant
Chondrus Crispus
Masking
Xanthan Gum
EmulsifyingFerulic Acid
Antimicrobial
Salix Alba Bark Extract
Astringent
Camellia Sinensis Leaf Extract
Antimicrobial
Alpha-Glucan Oligosaccharide
Cleansing
Phenethyl Alcohol
Masking1,2-Hexanediol
Skin Conditioning
Glycyrrhiza Glabra Root Extract
Bleaching
Parfum
Masking
Limonene
Perfuming
Linalool
Perfuming
Benzyl Salicylate
Perfuming
Water, Ascorbic Acid, Glycerin, Hydroxyethylcellulose, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Hydrolyzed Sodium Hyaluronate, Sodium PCA, Erythritol, Chondrus Crispus, Xanthan Gum, Ferulic Acid, Salix Alba Bark Extract, Camellia Sinensis Leaf Extract, Alpha-Glucan Oligosaccharide, Phenethyl Alcohol, 1,2-Hexanediol, Glycyrrhiza Glabra Root Extract, Parfum, Limonene, Linalool, Benzyl Salicylate
Reviews
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.
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 preservatives
Camellia Sinensis Leaf Extract (tea extract) is one of the most well-researched plant extracts in skincare with an impressive resume.
Black tea, green tea, and oolong tea are all harvested from the Camellia Sinensis plant.
Studies show green tea extract and its catechins (like epigallocatechin gallate (EGCG)) help your skin cells product energy more efficiently and reducing the number of free-radicals that can damage your skin from the inside.
In lab-grown skin models, this translated to younger, healthier, and stronger skin.
There's also good sun protection data; researchers saw less DNA damage and redness on human skin when green tea was applied before UVB exposure. And the more they applied, the better the protection.
Needless to say, this ingredient shouldn't replace your sunscreen. But it is a great supportive ingredient that you can already find in many sunscreens and antioxidant serums.
A 2009 study found a 2% green tea lotion was effective for mild-to-moderate acne thanks to its anti-inflammatory and mild antimicrobial activity.
The quality of the extract matters a lot here:
Good extracts contain 50-90% catechins while lower quality ones are mostly there for marketing. We recommend reaching out to the brand if you have questions about the quality or source of their ingredients.
Human Repeated Insult Patch Testing showed no irritation or sensitization at use concentrations (0.86% in leave-on products and up to 30% as leaf water).
Learn more about Camellia Sinensis Leaf ExtractGlycerin (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.
Learn more about GlycerinThis ingredient is created by putting sodium hyaluronate through hydrolysis.
You might know this as 'mini' or 'ultra low-molecular weight' hyaluronic acid. The small molecule size means it is able to travel deeper in the skin.
According to studies, low molecular-weight hyaluronic acid can:
One study from 2011 found ultra-low weight HA to show pro-inflammatory properties. Another study from 2022 found it to downregulate UV-B induced inflammation.
Hydrolysis is a process of changing a molecule using water or enzymes.
This ingredient is water-soluble.
Learn more about Hydrolyzed Sodium HyaluronatePhenethyl Alcohol is a colorless and aromatic alohol. It is naturally occuring in essential oils.
The scent of this ingredient is floral and often compared to rose.
Like other alcohols, this ingredient helps prevent the growth of bacteria. However, its main purpose is to impact a fragrance.
Learn more about Phenethyl AlcoholSodium Acetylated Hyaluronate is a type of Hyaluronic Acid.
Hyaluronic Acids help moisturize, soothe, and protect the skin.
Read about common types of Hyaluronic Acid here:
Learn more about Sodium Acetylated HyaluronateSodium 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.
Learn more about Sodium HyaluronateSodium Hyaluronate Crosspolymer is a crosslinked version of sodium hyaluronate. This just means it's linked into a 3D mesh network that lets it be more stable and sit on skin as a cohesive, gel-like film rather than sinking into skin.
A 2016 human skin study found crosslinked HA increased epidermal water content by 7.6% over the control group and reduced transepidermal water loss by 27.8%.
A follow-up clinical trial found that a topical crosslinked HA serum applied after fillers, microneedling, or chemical peels was well-tolerated and enhanced skin quality at 14 / 28 days.
More recent research suggests that concentrations as low as 0.03% can act as a penetration enhancer for other skincare actives.
Learn more about Sodium Hyaluronate CrosspolymerSodium PCA (the salt of PCA) is one of the most well-established humectants in skincare.
Why is it so special? Your skin already makes it naturally; it's a natural component of your skin's Natural Moisturizing Factor (NMF), or the mix of water-binding compounds inside your skin cells that keeps things soft and hydrated.
As a cosmetic ingredient, it grabs water and holds it in the upper layers of skin to smooth roughness and ease dehydration.
There's some clinical support for the NMF approach with a study showing that a cream built to mimic the skin's NMF significantly boosted hydration.
Safety-wise, this ingredient non-irritating, non-comedogenic, and non-phototoxic in testing, with minimal skin absorption.
It also works really well with other hydrators like glycerin or hyaluronic acid, and typical usage is somewhere between 0.2-4%.
Learn more about Sodium PCAWater. 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!
Learn more about WaterXanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan Gum
