Skin science article
Isntree Plum Peptide Plumping Gel Mask Versus Isntree Plum Peptide Booster 2000s
Isntree Plum Peptide Plumping Gel Mask Versus Isntree Plum Peptide Booster 2000s This anti-aging sheet mask is formulated around Niacinamide and Acetyl Hexapeptide-8 to soften the look of wrinkles. This smoothing serum is formulated around Niacinamide and Acet
Isntree Plum Peptide Plumping Gel Mask Versus Isntree Plum Peptide Booster 2000s
This anti-aging sheet mask is formulated around Niacinamide and Acetyl Hexapeptide-8 to soften the look of wrinkles.
This smoothing serum is formulated around Niacinamide and Acetyl Hexapeptide-8 to refine skin texture and soften the look of wrinkles.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
Methylpropanediol
Macadamia Integrifolia Seed Oil
Niacinamide
Chondrus Crispus Powder
1,2-Hexanediol
Ceratonia Siliqua Gum
Butyrospermum Parkii Butter
Prunus Domestica Fruit Extract
Eclipta Prostrata Extract
Melia Azadirachta Leaf Extract
Hydrolyzed Vegetable Protein
Moringa Oleifera Seed Oil
Hydrolyzed Collagen
Hydrolyzed Hyaluronic Acid
Hyaluronic Acid
Sodium Hyaluronate
Isononyl Isononanoate
Hydroxyacetophenone
Allantoin
Polyacrylate-13
Polyglyceryl-10 Laurate
Glucomannan
Glyceryl Stearate
Polyglyceryl-3 Methylglucose Distearate
Potassium Chloride
Propanediol
Sodium Polyacryloyldimethyl Taurate
Butylene Glycol
Hydrogenated Polyisobutene
Cellulose Gum
Cyamopsis Tetragonoloba Gum
Dextrin
Adenosine
Ethylhexylglycerin
Ethylhexyl Palmitate
Sodium Polyacrylate
Sorbitan Isostearate
Gellan Gum
Agar
Cyanocobalamin
Tocopherol
Glutathione
Hydrogenated Lecithin
Dimethylsilanol Hyaluronate
Hydrolyzed Sodium Hyaluronate
Potassium Hyaluronate
Hydroxypropyltrimonium Hyaluronate
Sodium Hyaluronate Crosspolymer
Acetyl Hexapeptide-8
Sodium Hyaluronate Dimethylsilanol
Sodium Acetylated Hyaluronate
Xanthan Gum
Water, Glycerin, Methylpropanediol, Macadamia Integrifolia Seed Oil, Niacinamide, Chondrus Crispus Powder, 1,2-Hexanediol, Ceratonia Siliqua Gum, Butyrospermum Parkii Butter, Prunus Domestica Fruit Extract, Eclipta Prostrata Extract, Melia Azadirachta Leaf Extract, Hydrolyzed Vegetable Protein, Moringa Oleifera Seed Oil, Hydrolyzed Collagen, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Sodium Hyaluronate, Isononyl Isononanoate, Hydroxyacetophenone, Allantoin, Polyacrylate-13, Polyglyceryl-10 Laurate, Glucomannan, Glyceryl Stearate, Polyglyceryl-3 Methylglucose Distearate, Potassium Chloride, Propanediol, Sodium Polyacryloyldimethyl Taurate, Butylene Glycol, Hydrogenated Polyisobutene, Cellulose Gum, Cyamopsis Tetragonoloba Gum, Dextrin, Adenosine, Ethylhexylglycerin, Ethylhexyl Palmitate, Sodium Polyacrylate, Sorbitan Isostearate, Gellan Gum, Agar, Cyanocobalamin, Tocopherol, Glutathione, Hydrogenated Lecithin, Dimethylsilanol Hyaluronate, Hydrolyzed Sodium Hyaluronate, Potassium Hyaluronate, Hydroxypropyltrimonium Hyaluronate, Sodium Hyaluronate Crosspolymer, Acetyl Hexapeptide-8, Sodium Hyaluronate Dimethylsilanol, Sodium Acetylated Hyaluronate, Xanthan Gum
Dipropylene Glycol
Glycereth-26
Olea Europaea Fruit Oil
Sorbitan Sesquioleate
Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Cetearyl Olivate
Vinyldimethicone
Polyisobutene
Sorbitan Olivate
Hydrolyzed Sponge
Prunus Salicina Fruit Extract
Panthenol
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Allium Cepa Bulb Extract
Tromethamine
Caprylyl/Capryl Glucoside
Sorbitan Oleate
Zea Mays Kernel Extract
Disodium EDTA
Centella Asiatica Extract
Fructan
Glucose
Ascorbic Acid
Water, Dipropylene Glycol, Glycerin, Glycereth-26, Niacinamide, Olea Europaea Fruit Oil, Ethylhexyl Palmitate, 1,2-Hexanediol, Butylene Glycol, Sorbitan Sesquioleate, Propanediol, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Olivate, Hydroxyacetophenone, Vinyldimethicone, Polyisobutene, Sorbitan Olivate, Hydrolyzed Sponge, Adenosine, Prunus Salicina Fruit Extract, Panthenol, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Hydrolyzed Vegetable Protein, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Allium Cepa Bulb Extract, Sodium Polyacrylate, Tromethamine, Ethylhexylglycerin, Acetyl Hexapeptide-8, Caprylyl/Capryl Glucoside, Sorbitan Oleate, Zea Mays Kernel Extract, Disodium EDTA, Allantoin, Centella Asiatica Extract, Cyanocobalamin, Fructan, Glucose, Glutathione, Ascorbic Acid
Alternatives
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
Acetyl Hexapeptide-8 (also known as Argireline) is a synthetic hexapeptide that is often called a "topical Botox alternative".
It works by mimicking how Botox relaxes muscles; it interferes with the signaling process that tells your facial muscles to contract. This can help soften expression lines like forehead wrinkles or crow's feet over time.
The comparison to Botox does have limits because the molecule is water-loving and relatively large.
Acetyl Hexapeptide-8 has a hard time absorbing deeply enough through the skin's outer barrier to actually reach the muscles.
So whether it truly works the way Botox does at a biological level is still up for debate, but early clinical outcomes are fairly encouraging.
A 12 week human study of a multi-ingredient regimen containing this ingredient saw:
While some studies have observed improvements in wrinkle appearance, it is important to note that more consistent results are seen in multi-ingredient formulations (vs just Acetyl Hexapeptide-8 alone).
Some research studies also used higher concentrations (up to 10%) while this ingredient is usually found in concentrations up to 0.005% in leave-on formulations.
Adenosine is a purine nucleoside that your body already makes in every cell. In skincare, it acts mainly as a skin conditioning and anti-aging agent.
The way it works is fairly well mapped out:
Your skin has cells called fibroblasts that build collagen (the stuff that keeps skin firm and smooth). Adenosine basically flips a switch on these cells that tells them to get to work making more collagen and other proteins. These cells slow down on their own as skin ages, so Adenosine helps give them a little nudge to keep going.
The clinical backing is pretty solid too.
A blind, randomized, placebo-controlled trial of 126 women aged 45-65 tested a 0.1% cream twice daily and found real improvements in crow's feet and frown lines using a precise 3D skin-mapping technique; these changes showed up by week 3 and held at 2 months.
A later study using Adenosine-loaded dissolving microneedle patches reported gains in wrinkle depth, dermal density, elasticity, and hydration.
On concentrations, South Korea's Ministry of Food and Drug Safety has set 0.04% as the approved functional anti-wrinkle level. You'll typically see this ingredient used somewhere in the 0.04-0.1% range since it works at low doses.
This ingredient has been found safe for cosmetics with the data showing no irritation or sensitization.
Overall, this is a great ingredient for any anti-aging routine and has no photosensitizing effect, so it suits both AM and PM use.
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.
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.
Cyanocobalamin is the manufactured version of vitamin B12. It has skin soothing, antioxidant, and barrier protecting properties. Topical cyanocobalamin is used to treat skin irritation and atopic dermatitis.
Ethylhexyl Palmitate, also known as octyl palmitate, is created from 2-ethylhexyl alcohol and palmitic acid.
In cosmetics, it plays many roles:
One thing worth noting: a controlled study found this ingredient applied under occlusion to acne-prone subjects increased microcomedones. Just keep in mind this was under occlusive conditions and don't reflect how most products are used day-to-day.
For most people, this is a well-tolerated and lightweight ingredient.
This ingredient may not be fungal acne safe because it is an ester of palmitic acid, a C16 fatty acid that falls within the C11-24 range that Malassezia can metabolize.
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.
Glutathione is a tiny protein-like molecule (a "tripeptide" build from 3 amino acids: glycine, cysteine, and glutamic acid) that your body already makes on its own.
Inside your body, it acts as one of the skin's main antioxidants that help fight against free radicals.
In skincare, it's best known as a brightening ingredient that slows down tyrosinase, the key enzyme that makes skin pigment. It also nudges the skin toward making a lighter type of pigment instead of a darker one.
This is why you'll see it in products aimed at dark spots and uneven tone.
A small number of real human trials have found a topical glutathione lotion:
The honest caveat is that the current evidence is still thin (few studies, small groups, short timelines). Glutathione also doesn't absorb into skin very easily so results tend to be modest and fade if you stop using it.
One thing worth clearing up:
The scary side effects you may have heard about come from glutathione injected intravenously, which has real safety concerns. Applying it topically is a completely different thing and has a clean track record.
Most human studies used it around 2% (as Glutathione or Glutathione Disulfide) and a 2% oxidized glutathione lotion and a 2% S-acyl glutathione cream are the concentrations with actual clinical data behind them.
There's no established "ideal" percentage yet but 1-2% is the evidence-backed range.
Allergy-wise, there is very low risk for this ingredient; it was well-tolerated across the topical trials. Only one participant had mild temporary redness that cleared up on its own and another study reported no adverse reactions at all.
One trial had ~10% of users drop out for irritation was using a combination cream that also had 10% azelaic acid so the irritation likely wasn't from the glutathione. There's no notable contact-allergy signal for topical glutathione in the literature but patch-testing before first use is still sensible for those with sensitive skin.
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.
Hyaluronic acid (HA) is a glycosaminoglycan (basically a long sugar chain) that your skin already makes on its own. In your skin, HA lives in the extracellular matrix and acts as the body's moisture reservoir.
Topically, HA is a humectant that binds water and helps skin look more plump, smooth, and hydrated.
The only catch is that HA isn't a single thing; it actually comes in a wide range of molecular weights (~50 - 2,000+ kDA) and size matters.
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
This is why the best HA serums blend the two sizes together so you get the best of both worlds.
The majority of cosmetic HA is produced by bacterial fermentation, typically using Streptococcus or Bacillus strains. Typical use levels in skincare sit around 0.1-2%.
A clinical study using a 0.2% low-molecular weight HA gel showed improvement in facial seborrheic dermatitis with excellent tolerance.
These are some other common types of Hyaluronic Acid:
Hydrolyzed Hyaluronic Acid is hyaluronic acid (HA) that is broken down into lower molecular weight fragments.
It's a humectant that pulls and holds water in the skin to help with hydration, plumpness, and reduce transepidermal water loss.
Because hydrolyzed hyaluronic acid is smaller in size, it can slip past your outermost layer of skin more easily than full-sized HA.
Most formulations will combine all sizes to get the best of both worlds.
Typical usage levels range from 0.01-1%. Any percentage higher than 2% might become goopy and tacky.
We don't have a description for Hydrolyzed Vegetable Protein yet.
Hydroxyacetophenone is a small phenolic molecule that earns its place in a formulas as an antioxidant and preservative booster.
As a phenol, it is able to neutralize free radicals to protect both the product and the skin from oxidative stress.
Though it can't kill microbes on its own, it works as a good supporting agent when combined with other preservatives like Phenoxyethanol or 1,2-Hexanediol.
This ingredient naturally occurs as piceol in Norwegian spruce needles (~0.4-1.1% dry weight and in cloudberries). Though the cosmetic-grade material is synthesized for purity and consistency.
You'll usually see it used at low levels and suppliers recommend up to 1% added to a water phase.
Safety testing was done at concentrations like 0.05% in SPF products and 0.5% in a Human Repeated Insult Patch Test. The safety evidence is assuring; this ingredient is safe for cosmetics in current use and also holds safety status as a food flavoring as well.
An honest caveat: the "soothing" and "anti-inflammatory" claims come mostly from supplier marketing rather than published clinical trials. The Cosmetic Ingredient Review's own literature search found no useful efficacy studies on this ingredient.
So the antioxidant and preservative-boosting roles are the well supported ones while the calming benefit is plausible but thinly evidenced.
Overall, this is a well-tolerated, low-irritation multitasker that quietly helps a formula stay fresh and stable.
Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging.
And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin.
You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this.
In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it.
If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes.
In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution).
Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger looking skin.
Another name for vitamin B3 is nicotinamide. This vitamin is water-soluble and our bodies don't store it. We obtain Vitamin B3 from either food or skincare. Meat, fish, wheat, yeast, and leafy greens contain vitamin B3.
The type of niacinamide used in skincare is synthetically created.
Propanediol 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.
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:
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.
Sodium Polyacrylate is the sodium salt of polyacrylic acid. It is used as an absorber, emollient, and stabilizer.
This ingredient is a super-absorbent polymer - meaning it can absorb 100 to 1000 times its mass in water. As an emollient, Sodium Polyacrylate helps soften and soothe skin. Emollients work by creating a barrier to trap moisture in. This helps keep your skin hydrated.
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!