Skin science article
Eqqualberry Bakuchiol Plumping Serum Versus Paula's Choice Clinical 0.3% Retinol + 2% Bakuchiol Treatment
Eqqualberry Bakuchiol Plumping Serum Versus Paula's Choice Clinical 0.3% Retinol + 2% Bakuchiol Treatment This anti-aging serum is formulated around Bakuchiol and Niacinamide to soften the look of wrinkles and strengthen the skin barrier. This anti-aging treat
Eqqualberry Bakuchiol Plumping Serum Versus Paula's Choice Clinical 0.3% Retinol + 2% Bakuchiol Treatment
This anti-aging serum is formulated around Bakuchiol and Niacinamide to soften the look of wrinkles and strengthen the skin barrier.
This anti-aging treatment is formulated around Bakuchiol and Tetrahexyldecyl Ascorbate to soften the look of wrinkles and refine skin texture.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Butylene Glycol
Glycerin
Cetyl Ethylhexanoate
1,2-Hexanediol
Niacinamide
Hydrogenated Lecithin
Pentaerythrityl Tetrabehenate
Diethoxyethyl Succinate
Betaine
Ceramide NP
Melia Azadirachta Flower Extract
Hydroxyethyl Urea
Bakuchiol
Cetearyl Alcohol
Squalane
Coccinia Indica Fruit Extract
Panthenol
Carbomer
Butyrospermum Parkii Butter
Tromethamine
Xanthan Gum
Allantoin
Ethylhexylglycerin
2,3-Butanediol
Adenosine
Disodium EDTA
Lavandula Angustifolia Oil
Sodium Carboxymethyl Beta-Glucan
Glyceryl Stearate
Dipropylene Glycol
Citrus Aurantium Bergamia Fruit Oil
Sodium Hyaluronate
Rubus Fruticosus Fruit Extract
Vaccinium Macrocarpon Fruit Extract
Vaccinium Angustifolium Fruit Extract
Rubus Idaeus Fruit Extract
Sambucus Nigra Fruit Extract
Sodium Lactate
Polyglyceryl-10 Laurate
Ceramide Ns
Ceramide As
Ceramide AP
Cholesterol
Salvia Officinalis Oil
Polysorbate 20
Octyldodecanol
Polyglyceryl-4 Caprate
Methylpropanediol
Hydrolyzed Hyaluronic Acid
Hydrolyzed Sodium Hyaluronate
Hyaluronic Acid
Hydroxypropyltrimonium Hyaluronate
Potassium Hyaluronate
Astaxanthin
Pentylene Glycol
Sodium Hyaluronate Crosspolymer
Palmitoyl Tripeptide-1
Soluble Collagen
Sodium Acetylated Hyaluronate
Copper Tripeptide-1
Palmitoyl Tetrapeptide-7
Oligopeptide-32
Oligopeptide-29
Acetyl Hexapeptide-8
Ceramide EOP
Acetyl Tetrapeptide-2
Acetyl Tetrapeptide-3
Acetyl Octapeptide-3
Palmitoyl Pentapeptide-4
Oligopeptide-6
Hexapeptide-9
Nonapeptide-1
Limonene
Linalool
Water, Butylene Glycol, Glycerin, Cetyl Ethylhexanoate, 1,2-Hexanediol, Niacinamide, Hydrogenated Lecithin, Pentaerythrityl Tetrabehenate, Diethoxyethyl Succinate, Betaine, Ceramide NP, Melia Azadirachta Flower Extract, Hydroxyethyl Urea, Bakuchiol, Cetearyl Alcohol, Squalane, Coccinia Indica Fruit Extract, Panthenol, Carbomer, Butyrospermum Parkii Butter, Tromethamine, Xanthan Gum, Allantoin, Ethylhexylglycerin, 2,3-Butanediol, Adenosine, Disodium EDTA, Lavandula Angustifolia Oil, Sodium Carboxymethyl Beta-Glucan, Glyceryl Stearate, Dipropylene Glycol, Citrus Aurantium Bergamia Fruit Oil, Sodium Hyaluronate, Rubus Fruticosus Fruit Extract, Vaccinium Macrocarpon Fruit Extract, Vaccinium Angustifolium Fruit Extract, Rubus Idaeus Fruit Extract, Sambucus Nigra Fruit Extract, Sodium Lactate, Polyglyceryl-10 Laurate, Ceramide Ns, Ceramide As, Ceramide AP, Cholesterol, Salvia Officinalis Oil, Polysorbate 20, Octyldodecanol, Polyglyceryl-4 Caprate, Methylpropanediol, Hydrolyzed Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Hyaluronic Acid, Hydroxypropyltrimonium Hyaluronate, Potassium Hyaluronate, Astaxanthin, Pentylene Glycol, Sodium Hyaluronate Crosspolymer, Palmitoyl Tripeptide-1, Soluble Collagen, Sodium Acetylated Hyaluronate, Copper Tripeptide-1, Palmitoyl Tetrapeptide-7, Oligopeptide-32, Oligopeptide-29, Acetyl Hexapeptide-8, Ceramide EOP, Acetyl Tetrapeptide-2, Acetyl Tetrapeptide-3, Acetyl Octapeptide-3, Palmitoyl Pentapeptide-4, Oligopeptide-6, Hexapeptide-9, Nonapeptide-1, Limonene, Linalool
Dimethicone
Pentaerythrityl Tetraisostearate
Isononyl Isononanoate
Arachidyl Alcohol
Glyceryl Polymethacrylate
Dimethicone Crosspolymer
Behenyl Alcohol
PEG-75 Shea Butter Glycerides
C12-15 Alkyl Benzoate
Tetrahexyldecyl Ascorbate
Retinol
Ceramide Ng
Palmitoyl Hexapeptide-12
Dipotassium Glycyrrhizate
Glycyrrhiza Glabra Root Extract
Avena Sativa Kernel Extract
Arctium Lappa Root Extract
Salix Alba Bark Extract
Glycine Soja Sterols
Lecithin
Tocopheryl Acetate
Hydrolyzed Soy Protein
Sodium Hydroxide
Tribehenin
Caprylyl Glycol
Dipeptide-2
Polygonum Cuspidatum Root Extract
PEG-10 Phytosterol
PEG-8
Magnesium Aluminum Silicate
Arachidyl Glucoside
Chrysin
Sodium Acrylates Copolymer
Steareth-20
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Coco-Glucoside
Hesperidin Methyl Chalcone
N-Hydroxysuccinimide
Phenoxyethanol
Benzoic Acid
Water, Dimethicone, Pentaerythrityl Tetraisostearate, Isononyl Isononanoate, Butylene Glycol, Bakuchiol, Arachidyl Alcohol, Glyceryl Polymethacrylate, Dimethicone Crosspolymer, Behenyl Alcohol, Glycerin, PEG-75 Shea Butter Glycerides, Glyceryl Stearate, C12-15 Alkyl Benzoate, Polysorbate 20, Tetrahexyldecyl Ascorbate, Retinol, Ceramide Ng, Palmitoyl Tetrapeptide-7, Palmitoyl Hexapeptide-12, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Glycyrrhiza Glabra Root Extract, Avena Sativa Kernel Extract, Arctium Lappa Root Extract, Salix Alba Bark Extract, Glycine Soja Sterols, Lecithin, Allantoin, Tocopheryl Acetate, Hydrolyzed Soy Protein, Palmitoyl Tripeptide-1, Sodium Hydroxide, Tribehenin, Caprylyl Glycol, Dipeptide-2, Polygonum Cuspidatum Root Extract, PEG-10 Phytosterol, PEG-8, Magnesium Aluminum Silicate, Arachidyl Glucoside, Chrysin, Pentylene Glycol, Sodium Acrylates Copolymer, Steareth-20, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Alcohol, Coco-Glucoside, Hesperidin Methyl Chalcone, N-Hydroxysuccinimide, Disodium EDTA, Phenoxyethanol, Benzoic Acid, Ethylhexylglycerin
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.
Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
Bakuchiol is a plant-derived antioxidant from the seeds of the Psoralea corylifolia plant. It has antimicrobial, emollient, skin conditioning, and antioxidant properties.
You'll likely see it called a "retinol replacement" but the two are technically not related. This is because bakuchiol is able to flip many of the same switches in your skin cells to tell them to:
1) produce more collagen (type I, III, and IV) 2) activate the same genes retinoids do
Unlike retinoids, this ingredient will not increase photosensitivity and is safe to use during pregnancy (but please still check in with your doctor!).
The flagship clinical trial from Dhaliwal et al. 2019 found 0.5% bakuchiol (twice daily) and 0.5% retinol (once daily) reduced wrinkles and hyperpigmentation equally, but bakuchiol had significantly less irritation.
Systematic reviews also back this up:
Bakuchiol is comparable to retinol for photoaging but with better tolerability. It also has mild antibacterial properties against Cutibacterium acnes and antifungal activity in vitro against Candida and dermatophytes.
The reason bakuchiol works well is due to its structure; it is a meroterpene phenol, or a hybrid molecule. The phenol half acts as an antioxidant while the terpene half is fat-loving. This helps the molecule slip through the skin barrier.
This ingredient is usually used between 0.5-2%. Only one case of contact dermatitis has ever been reported for this ingredient.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.
Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.
It plays several roles in a formula:
Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.
Multiple assessments have found it to be non-irritating and non-sensitizing to most people.
However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.
Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.
Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans.
Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients.
This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize.
A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe.
Disodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air.
This ingredient mainly works behind the scenes and helps with:
On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it.
One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin).
Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption.
You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%.
Ethylhexylglycerin 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.
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.
Glyceryl Stearate is made by reacting glycerin with stearic acid (typically sourced from plant oils like palm or coconut). It's an emulsifier, emollient, and mild occlusive.
Emulsifiers help ingredients like oil and water stay mixed so your formula stays nicely blended and uniform in texture.
This ingredient is typically used in concentrations between 1-10%. Studies have found it to be non-sensitizing, non-phototoxic, and non-photoallergenic.
A close cousin of this ingredient is Glyceryl Stearate SE ("self-emulsifying"). This just has a small amount of sodium or potassium stearate added so it can emulsify without a co-emulsifier.
Since this ingredient is an ester of a C18 fatty acid, it may not be fungal acne safe. The Malassezia yeast can potentially metabolize within the C11-C24 range.
Fun fact: The human body also creates Glyceryl Stearate naturally.
Palmitoyl Tetrapeptide-7 (formerly Palmitoyl Tetrapeptide-3) is a synthetic peptide. Its main job is to fight what researchers call "inflammaging".
"Inflammaging" is the slow, low-grade chronic inflammation that quietly breaks down collagen as we age.
This ingredient calms down a specific inflammation signal in your skin cells (called IL-6). When left unchecked, this signal triggers enzymes that break down collagen and elastin.
Clinical testing showed statistically significant improvements in:
Studies also found the more of this ingredient used, the more your skin produces Collagen I, fibronectin, and hyaluronic acid.
You'll likely see this ingredient paired with Palmitoyl Tripeptide-1 in the well-known Matrixyl 3000 complex for enhanced anti-aging effects.
A 3% concentration applied twice daily for two months showed meaningful skin rejuvenation results in clinical panels.
Fungal acne note: Usually a palmitic acid component can feed Malassezia in unbound form, but here is is covalently bonded to the peptide. This means it is very difficult for Malassezia to access, and therefore very unlikely to cause fungal acne.
Palmitoyl Tripeptide-1 (aka Pal-GHK) is a synthetic signal peptide made of three amino acids attached to palmitic acid.
That fatty acid attachment is the key: it boosts the peptide's ability to penetrate the skin barrier. This puts it closer to the dermal cells where it can actually make a difference.
Once there, it acts as a matrikine, a signaling peptide that prompts fibroblasts to produce more collagen, fibronectin, and hyaluronic acid.
In vitro studies show it can boost collagen production in skin cells even when UV-damaged skin samples were treated with it at a tiny concentration (it almost fully restored dermal collagen at 5ppm). It achieved this at 100x lower concentration than retinoic acid, which needed 500 ppm to do the same thing.
Human clinical data is promising, but modest:
A study of 23 female volunteers found a small but statistically significant increase (~4%) in skin thickness after treatment at 4 ppm.
A separate small trial of 15 women showed statistically significant reductions in wrinkle length, depth, and skin roughness after applying it twice daily for four weeks.
You'll likely see Pal-GHK paired with Palmitoyl Tetrapeptide-7 as part of the Matrixyl 3000 complex.
Pentylene 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%.
Polysorbate 20 is a gentle, water-soluble emulsifier and mild surfactant. It stops oil and water from separating to keep your formulas blended and stable.
It also acts as a mild penetration enhancer by helping active ingredients absorb slightly better.
The common safety discussion around this ingredient involves a manufacturing byproduct called 1,4-dioxane.
Trace amounts can form during production but the EU's Scientific Committee on Consumer Safety has concluded that levels at/below 10 ppm in finished products are safe (commercial products consistently fall within acceptable margins).
True allergic reactions are uncommon and the CIR Expert Panel has confirmed this ingredient to be safe as used in cosmetics.
Because it is derived from lauric acid, it may not be fungal acne safe.
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!