Modern Chemistry By Boots Modern Chemistry Restore Hydrating Serum Versus Cocokind Hydrating Electrolyte Rescue Serum
This barrier-repair serum is formulated around Niacinamide to strengthen the skin barrier.
This hydrating serum is formulated around Zinc PCA and Sodium PCA to hydrate skin and strengthen the skin barrier.
What's inside
What's inside
Key Ingredients
Benefits
Concerns
No concerns
Ingredients Side-by-side
Water
Skin ConditioningCoco-Caprylate/Caprate
Emollient
Pentylene Glycol
Skin Conditioning
Propanediol
Solvent
Glycerin
Humectant
Butylene Glycol
Humectant
Niacinamide
Smoothing
Maltodextrin
Absorbent
Cellulose
Absorbent
Sodium Acrylates Copolymer
Phenoxyethanol
Preservative
Enantia Chlorantha Bark Extract
Skin ConditioningMagnesium PCA
Humectant
Lecithin
Emollient
Xanthan Gum
EmulsifyingNelumbo Nucifera Flower Water
TonicNymphaea Coerulea Flower Water
Skin ConditioningOleanolic Acid
Skin ConditioningTrisodium Ethylenediamine Disuccinate
Ethylhexylglycerin
Skin ConditioningWithania Somnifera Root Extract
Skin Conditioning
Avena Sativa Leaf/Stalk Extract
Skin ConditioningChamomilla Recutita Flower Extract
Masking
Melissa Officinalis Leaf Extract
Skin ConditioningPassiflora Incarnata Extract
AstringentScutellaria Lateriflora Extract
Skin ConditioningFructose
Humectant
Citric Acid
Buffering
Sodium Hydroxide
BufferingVitex Agnus Castus Extract
AstringentPotassium Sorbate
Preservative
Water, Coco-Caprylate/Caprate, Pentylene Glycol, Propanediol, Glycerin, Butylene Glycol, Niacinamide, Maltodextrin, Cellulose, Sodium Acrylates Copolymer, Phenoxyethanol, Enantia Chlorantha Bark Extract, Magnesium PCA, Lecithin, Xanthan Gum, Nelumbo Nucifera Flower Water, Nymphaea Coerulea Flower Water, Oleanolic Acid, Trisodium Ethylenediamine Disuccinate, Ethylhexylglycerin, Withania Somnifera Root Extract, Avena Sativa Leaf/Stalk Extract, Chamomilla Recutita Flower Extract, Melissa Officinalis Leaf Extract, Passiflora Incarnata Extract, Scutellaria Lateriflora Extract, Fructose, Citric Acid, Sodium Hydroxide, Vitex Agnus Castus Extract, Potassium Sorbate
Water
Skin ConditioningGlycerin
Humectant
Propanediol
Solvent
Coco-Caprylate/Caprate
Emollient
Caprylic/Capric Triglyceride
Masking
Sodium Acrylates Copolymer
Pentylene Glycol
Skin Conditioning
Lecithin
Emollient
Caprylyl Glycol
Emollient
Ethylhexylglycerin
Skin ConditioningZinc PCA
Humectant
Sodium PCA
Humectant
Magnesium PCA
Humectant
Manganese PCA
HumectantXanthan Gum
EmulsifyingMaltodextrin
Absorbent
Hydrolyzed Glycosaminoglycans
HumectantSodium Hyaluronate
Humectant
Hyaluronic Acid
Humectant
Hydrolyzed Hyaluronic Acid
Humectant
Polyglutamic Acid
Skin Conditioning
Beta-Glucan
Skin Conditioning
Tremella Fuciformis Polysaccharide
Emulsion Stabilising
Pullulan
Sclerotium Gum
Emulsion StabilisingSilica
Abrasive
Glyceryl Acrylate/Acrylic Acid Copolymer
HumectantChlamydomonas Extract
Skin ConditioningWater, Glycerin, Propanediol, Coco-Caprylate/Caprate, Caprylic/Capric Triglyceride, Sodium Acrylates Copolymer, Pentylene Glycol, Lecithin, Caprylyl Glycol, Ethylhexylglycerin, Zinc PCA, Sodium PCA, Magnesium PCA, Manganese PCA, Xanthan Gum, Maltodextrin, Hydrolyzed Glycosaminoglycans, Sodium Hyaluronate, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Polyglutamic Acid, Beta-Glucan, Tremella Fuciformis Polysaccharide, Pullulan, Sclerotium Gum, Silica, Glyceryl Acrylate/Acrylic Acid Copolymer, Chlamydomonas Extract
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Coco-Caprylate/Caprate is a lightweight ester created from coconut oil fatty acids, caprylic acid, and capric acid.
It is an emollient that helps soften skin and reduce transepidermal water loss (TEWL). What sets it apart from heavier emollients is its ultralight, non-greasy feel.
Once applied, this ingredient dries down quickly and leaves a dry, silky finish behind. This also helps improve spreadability and texture.
This ingredient has an excellent safety-record and is non-irritating.
Typical concentrations for cosmetics range from 0.5-62%.
Research on Malassezia growth found no growth on fatty acid esters with chain lengths shorter than 12 carbons (it prefers C11-24).
Since Coco-Caprylate/Caprate is built on C8 and C10 fatty acids, it is out of the range that Malassezia metabolizes, and therefore safe for fungal acne.
Learn more about Coco-Caprylate/CaprateEthylhexylglycerin 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.
Learn more about EthylhexylglycerinGlycerin (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 GlycerinLecithin is a term for a group of substances found in the cell membranes of plants, animals, and humans. They are made up of phospholipids.
Thanks to its amphiphilic structure (water-loving head and oil-loving tail), it is a true multitasker:
It plays well with most ingredients and is typically used at 0.1-1%. However, concentrations up to 50% have been reported in moisturizers.
Learn more about LecithinThis ingredient is the magnesium salt of PCA (Pyrrolidone Carboxylic Acid). It is a great skin hydrator for the top layers of skin.
PCA is a natural humectant, meaning it draws water from the air to your outer layer of skin.
One study found magnesium ions improved skin hydration in the outer layer of skin, or the stratum corneum. However, it did not improve TEWL, or the transepidermal water loss. The TEWL is an indicator of how healthy your skin barrier function is. This study primarily looked at healthy skin with intact skin barrier.
Learn more about Magnesium PCAMaltodextrin is a plant-derived carbohydrate made by breaking down starch (usually from corn, potato, or rice). In cosmetic formulas, it's a multitasking absorbent, emulsion stabilizer, and skin conditioner.
This ingredient is mostly used to stabilize emulsions and improve the powdery, non-greasy feel of products (like dry shampoos).
Safety-wise, this ingredient is pretty solid; it's even recognized as a food additive. Both animal and clinical studies found no adverse effects at the levels used in cosmetics.
Industry data shows this ingredient is used up to 45.7% in spray products and up to 33% in powder products.
Learn more about MaltodextrinPentylene Glycol (1,2-pentanediol) is a multitasking little diol with three main roles in a formula:
Research on alkanediols (the family pentylene glycol belongs to) show they work by disrupting microbial cell membranes. This disruption helps the primary preservative system in a product work more effectively at lower doses.
On the safety side, the Cosmetic Ingredient Review Expert Panel has concluded this ingredient to be safe as used in current cosmetic practices + concentrations.
Typical use levels in a formula run about 1-5%.
Learn more about Pentylene GlycolPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolThis ingredient is a synthetic, salt form polymer built from acrylic acid, ethacrylic acid, or their simple esters. It works as a binder, film former, and viscosity increasing agent.
Typical concentrations start at around 0.5% but can go up to 25% for film-forming or binding.
The CIR Expert Panel assessed the safety of 126 acrylates copolymers and concluded they are safe in cosmetics at current use levels when formulated to be non-irritating. They also noted the levels present in finished cosmetic products are not considered a safety risk and Genotoxicity testing (Ames tests, chromosomal aberration assays) has come back negative across the board.
Though the raw building blocks (like acrylic acid) can be irritating on their own, cosmetic-grade versions go through purification to keep levels extremely low.
Sodium Acrylates Copolymer is a large molecule that doesn't penetrate skin barrier in any meaningful way.
Learn more about Sodium Acrylates CopolymerWater. 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
