Skintific Peptide Brightening Lip Serum Versus The INKEY List Tripeptide Plumping Lip Balm

Skintific Peptide Brightening Lip Serum Versus The INKEY List Tripeptide Plumping Lip Balm

This lip moisturizer is formulated around Ascorbyl Tetraisopalmitate and Palmitoyl Tripeptide-1 to hydrate lips.

This anti-aging lip moisturizer is formulated around Squalane and Palmitoyl Tripeptide-1 to soften the look of wrinkles and hydrate lips.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Petrolatum

Hydrogenated Polyisobutene

Octyldodecanol

Polyglyceryl-2 Triisostearate

Triisostearyl Citrate

C10-30 Cholesterol/Lanosterol Esters

Ascorbyl Tetraisopalmitate

Ethylene/Propylene/Styrene Copolymer

Ricinus Communis Seed Oil

Squalane

Dipalmitoyl Hydroxyproline

Sodium Hyaluronate

Butyrospermum Parkii Butter

Tocopherol

Hydrogenated Castor Oil

Palmitoyl Tripeptide-1

Ceramide NP

Ceramide Ns

Ceramide As

Ceramide EOP

Ceramide AP

Parfum

Butylene/Ethylene/Styrene Copolymer

Ethylhexyl Palmitate

Disodium EDTA

Tribehenin

Sorbitan Isostearate

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Glycerin

Hydrogenated Lecithin

Petrolatum, Hydrogenated Polyisobutene, Octyldodecanol, Polyglyceryl-2 Triisostearate, Triisostearyl Citrate, C10-30 Cholesterol/Lanosterol Esters, Ascorbyl Tetraisopalmitate, Ethylene/Propylene/Styrene Copolymer, Ricinus Communis Seed Oil, Squalane, Dipalmitoyl Hydroxyproline, Sodium Hyaluronate, Butyrospermum Parkii Butter, Tocopherol, Hydrogenated Castor Oil, Palmitoyl Tripeptide-1, Ceramide NP, Ceramide Ns, Ceramide As, Ceramide EOP, Ceramide AP, Parfum, Butylene/Ethylene/Styrene Copolymer, Ethylhexyl Palmitate, Disodium EDTA, Tribehenin, Sorbitan Isostearate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Glycerin, Hydrogenated Lecithin

Hydroxystearic/Linolenic/Oleic Polyglycerides

Glyceryl Rosinate

Theobroma Grandiflorum Seed Butter

Candelilla Cera

Mangifera Indica Seed Butter

Orbignya Oleifera Seed Oil

Cetearyl Ethylhexanoate

Hydrogenated Olive Oil

Salvia Hispanica Seed Oil

Caprylic/Capric Triglyceride

Glyceryl Behenate

Olea Europaea Oil Unsaponifiables

Portulaca Pilosa Extract

Trihydroxystearin

Helianthus Annuus Seed Oil

Sucrose Cocoate

Brassica Alba Sprout Extract

Palmitoyl Tripeptide-38

Glucomannan

Ricinus Communis Seed Oil, Hydroxystearic/Linolenic/Oleic Polyglycerides, Glyceryl Rosinate, Theobroma Grandiflorum Seed Butter, Butyrospermum Parkii Butter, Ethylhexyl Palmitate, Candelilla Cera, Mangifera Indica Seed Butter, Orbignya Oleifera Seed Oil, Squalane, Cetearyl Ethylhexanoate, Hydrogenated Olive Oil, Salvia Hispanica Seed Oil, Caprylic/Capric Triglyceride, Glyceryl Behenate, Olea Europaea Oil Unsaponifiables, Tribehenin, Sorbitan Isostearate, Tocopherol, Portulaca Pilosa Extract, Trihydroxystearin, Helianthus Annuus Seed Oil, Sucrose Cocoate, Brassica Alba Sprout Extract, Sodium Hyaluronate, Palmitoyl Tripeptide-1, Palmitoyl Tripeptide-38, Glucomannan

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.

This ingredient is also known as shea butter. It is a plant-derived extract from the nuts of the Africa shea tree and one of the most well-studied emollients.

Because it has a high concentration of fatty acids (primarily oleic, stearic, and linoleic) it is able to form a protective barrier on the skin's surface. This helps seal in moisture and prevents transepidermal water loss (TEWL).

In vitro research found an increase in skin hydration by 58% and a decrease in TEWL by 37.8% after 24 hours of applying this ingredient (pretty impressive for a single ingredient!).

Besides hydration, shea butter also contains triterpenes that have anti-inflammatory potential. In particule, lupeol cinnamate has shown the highest anti-inflammatory activity in vivo.

Shea butter also contains vitamins A and E which may contribute to antioxidant activity.

While Shea Butter has an SPF rating of about 3-4, it is not a sunscreen replacement.

This ingredient may not be fungal acne safe because its fatty acids fall within the C11-C24 range that the Malassezia yeast can metabolize.

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.

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.

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.

This ingredient is also known as castor oil. It is a skin conditioning ingredient.

The star component of castor oil is ricinoleic acid, an unusual fatty acid that makes up ~80-92% of its composition.

In skincare, it is an emollient that dries down to a solid film with water-binding properties. This helps keep skin hydrated and helps reduce transepidermal water loss (TEWL).

A 2026 dermatology review pulls together its broader uses:

Human clinical testing found this ingredient to be non-irritating and non-sensitizing.

Because castor oil contains fatty acids in the C11-24 range, this ingredient may not be fungal acne safe.

At this time, the literature does not support castor oil in regrowing hair. A 2022 systematic review found no strong evidence that it supports hair growth and only weak evidence that it improves hair shine.

Castor oil itself carries "perfuming" and "masking" function tags according to the official CosIng database. This is because of its mild odor and odor-dampening properties.

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.

Sorbitan Isostearate is an emulsifer. It is created from isostearic acid and sorbitol.

As an emulsifier, it keeps the water and oil ingredients from separating. This keeps formulas stable and smooth.

In a 24 hour occlusive patch test on 56 subjects, 10% sorbitan isostearate was completely non-irritating. Most formulas use less than 10%.

Because it's a fatty acid ester, it may not be fungal acne safe since the Malassezia yeast can utilize it as a nutrient source.

Squalane is the hydrogenated and shelf-stable form of squalene (a lipid that naturally occurs in human sebum).

It is an emollient and skin conditioning agent that is able to integrate seamlessly into the skin's lipid barrier without clogging pores.

This is due to how structurally similar it is to what your skin already produces.

Though it is mostly an emollient that helps soften and hydrate skin, it also has some humectant and occlusive action. Humectants help the skin retain moisture while occlusives seal it in, making squalane a triple-threat moisturizer.

Research shows it has antioxidant capabilities that help protect against stressors like UV exposure, specifically UVA induced oxidative stress. This study also found that it supports collagen biosynthesis in human dermal fibroblasts.

No clinical study has reported significant adverse effects and irritation reactions are very rare from this ingredient (even at 100% concentration).

Overall, it's a fantastic ingredient for hydration and is suitable for all skin types.

This depends on the source. Squalane can be derived from both plants and animals. Most squalane used in skincare comes from plants.

Please note: the source of squalane is only known if disclosed by the brand. We recommend reaching out to the brand if you have any questions about their squalane.

Read more about squalene with an "e".

Though squalane is often called an oil, it’s technically not one. It is a hydrocarbon, meaning it is only made of carbon and hydrogen. True oils are triglycerides and made of fatty acids and glycerol.

The term “oil-free” isn’t regulated so companies can define it however they want. Some exclude all oils, while others just avoid mineral oil or comedogenic oils.

Squalane has a comedogenic rating of 1 from the original 1972 study that tested raw ingredients under occlusion on rabbit ears. This system is not standardized or peer-reviewed, and using the raw ingredients is very different from how diluted cosmetic formulations are used on human skin.

A comedogenic rating of 1 means it is "unlikely to clog pores" according to the original rating system.

The overall formula of a product matters more than the individual ingredients on whether or not it will cause clogged pores.

Tocopherol is a fat-soluble antioxidant known as Vitamin E.

You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.

Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.

It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.

This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.

This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.

In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.

Concentrations usually range from 0.1-1% in most leave-on products.

Tribehenin is the triglyceride of glycerin and behenic acid. It is an emollient that helps soften and condition skin.

Safety-wise, this is a well-vetted ingredient. Repeated-insult patch tests of 0.38% tribehenin did not trigger sensitization.

This ingredient may not be fungal acne safe because behenic acid falls into the chain-length range that Malassezia yeasts can feed on.

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