Ingredient Research Database

Research-backed information on skincare ingredients — concentrations, risks, and clinical evidence from dermatological research.

66ingredients
10categories
475research papers

Popular Ingredients

Adapalene

AcneAnti-Aging

A third-generation synthetic retinoid originally developed for acne that has significant anti-aging benefits. Adapalene is more stable than tretinoin (resistant to light and oxygen degradation) and better tolerated because it selectively binds to RAR-beta and RAR-gamma receptors rather than all three subtypes. The 0.1% concentration became available OTC in 2016 (Differin), making it the most accessible prescription-strength retinoid.

Adapalene

AcneAnti-Aging

A third-generation synthetic retinoid specifically designed for acne treatment. Unlike tretinoin, adapalene selectively binds RAR-beta and RAR-gamma receptors in the skin, providing potent comedolytic and anti-inflammatory effects with significantly less irritation. It is also more stable in light and with benzoyl peroxide. Differin (0.1%) became OTC in 2016 — the first retinoid available without prescription in the US.

Allantoin

SoothingHydration

A gentle compound found naturally in comfrey root, chamomile, and wheat sprouts that promotes skin healing, moisturization, and the shedding of dead skin cells. Allantoin has been used in dermatology for over 70 years and is one of the most universally tolerated ingredients — it soothes, protects, and promotes recovery without any known irritation potential. Found in everything from diaper cream to post-procedure products.

Allantoin

SoothingHydration

A gentle, non-irritating compound found in comfrey root, chamomile, and wheat sprouts that promotes cell regeneration and has keratolytic and soothing properties. Allantoin is one of the most universally well-tolerated skincare ingredients — it is used in products for newborn babies, post-surgical care, and extremely reactive skin. It softens keratin, promotes wound healing, and reduces irritation from other active ingredients.

Aloe Vera

SoothingHydration

One of the oldest and most recognized soothing ingredients, used for millennia for burns, wounds, and skin irritation. Aloe vera gel contains over 75 active compounds including polysaccharides, vitamins, minerals, and enzymes. It provides immediate cooling, hydration, and anti-inflammatory relief. The evidence is strongest for wound healing, sunburn recovery, and moisturization.

Aloe Vera

SoothingHydration

The gel from Aloe barbadensis leaves has been used for skin healing for over 5,000 years and is backed by modern clinical evidence for wound healing, burn treatment, and anti-inflammatory effects. Aloe gel contains over 75 active compounds including polysaccharides (acemannan), vitamins, minerals, enzymes, and amino acids. It hydrates, soothes, accelerates wound healing, and provides mild antibacterial protection.

Alpha Arbutin

Brightening

A naturally derived tyrosinase inhibitor extracted from bearberry, cranberry, and blueberry plants. Alpha arbutin slowly releases hydroquinone in a controlled manner within the skin to lighten hyperpigmentation safely. It is significantly gentler than direct hydroquinone application while providing meaningful brightening over time. One of the safest and most effective brightening ingredients available.

Argan Oil

HydrationAntioxidant

A luxury oil from the Argania spinosa tree native to Morocco, rich in oleic acid, linoleic acid, vitamin E, and squalene. Argan oil provides excellent moisturization, antioxidant protection, and anti-inflammatory effects. It has a favorable comedogenic rating for an oil and is absorbed relatively quickly. Used for face, hair, and body. Cold-pressed, unrefined oil retains the most bioactives.

Argireline (Acetyl Hexapeptide-3)

Anti-Aging

Known as 'topical Botox,' Argireline is a peptide that reduces the appearance of expression lines by partially inhibiting the SNARE complex — the same mechanism targeted by botulinum toxin, but through topical application rather than injection. The effect is much milder than Botox (roughly 30% wrinkle reduction vs 80%+) but provides a non-invasive option for forehead lines, crow's feet, and frown lines.

Azelaic Acid

AcneBrighteningSoothing

A dicarboxylic acid naturally produced by yeast on the skin. Azelaic acid is a true multi-tasker that treats acne, rosacea, and hyperpigmentation simultaneously. It is one of the few active ingredients considered safe during pregnancy, and it uniquely targets only abnormal melanocytes — meaning it brightens dark spots without lightening normal skin. Effective for both inflammatory acne and post-inflammatory hyperpigmentation (PIH).

Azelaic Acid

AcneBrighteningSoothing

A dicarboxylic acid naturally produced by Malassezia yeast on human skin. Azelaic acid is a uniquely versatile ingredient — it treats acne, reduces hyperpigmentation, has anti-rosacea effects, and is safe in pregnancy. It selectively targets abnormally active melanocytes while leaving normal pigmentation alone, making it ideal for post-inflammatory hyperpigmentation. Also available by prescription (15-20%) for rosacea.

Bakuchiol

Anti-AgingSoothing

A plant-derived compound from Psoralea corylifolia seeds that provides retinol-like benefits without retinoid chemistry. Bakuchiol does not bind to retinoic acid receptors — it achieves similar gene expression changes through a completely different mechanism, making it safe during pregnancy and for skin too sensitive for any retinoid. Clinical studies show comparable improvements in wrinkles and pigmentation to 0.5% retinol.

Bakuchiol

Anti-AgingSoothing

A plant-derived compound from Psoralea corylifolia seeds that has been clinically shown to provide retinol-like anti-aging effects without retinoid side effects. A 2019 British Journal of Dermatology study directly compared bakuchiol to retinol and found comparable improvement in fine lines, pigmentation, and photodamage — but with significantly less scaling and stinging. It is the most evidence-backed 'retinol alternative' for those who cannot tolerate retinoids.

Benzoyl Peroxide

Acne

The most effective OTC acne treatment and one of the few topical treatments that kills acne-causing bacteria (C. acnes) without promoting antibiotic resistance. Benzoyl peroxide works through oxidation — it releases oxygen into pores, creating an environment where anaerobic bacteria cannot survive. It is one of three first-line acne treatments (alongside adapalene and salicylic acid) recommended by dermatological guidelines.

Benzoyl Peroxide

Acne

The most widely used OTC acne treatment and one of the only topical anti-acne agents to which bacteria cannot develop resistance. Benzoyl peroxide kills C. acnes through oxidative damage — releasing free oxygen radicals that the anaerobic bacteria cannot survive. It also has mild keratolytic and comedolytic (pore-unclogging) effects. Available in 2.5%, 5%, and 10% concentrations.

Centella Asiatica

SoothingBarrier RepairAnti-Aging

Also known as Cica, Gotu Kola, or Tiger Grass, Centella Asiatica is an herb used in traditional medicine for wound healing that has become one of the most popular soothing ingredients in Korean and global skincare. Its active compounds (madecassoside, asiaticoside, madecassic acid, asiatic acid) reduce inflammation, stimulate collagen production, and accelerate wound healing. Essential for sensitive and compromised skin.

Centella Asiatica (Cica)

SoothingAnti-Aging

An herbaceous plant used for centuries in Ayurvedic and Chinese medicine, now one of the most popular soothing ingredients in K-beauty. Centella's triterpene compounds (madecassoside, asiaticoside, madecassic acid, asiatic acid) collectively called 'TECA' or 'cica' promote collagen synthesis, inhibit inflammation, and accelerate wound healing. It is the go-to ingredient for sensitive, irritated, acne-damaged, or post-procedure skin.

Ceramides

Barrier RepairHydration

Lipids that make up approximately 50% of the skin barrier by weight. Ceramides form the 'mortar' between skin cells (the 'bricks'), creating a waterproof barrier that prevents water loss and keeps irritants out. When the skin barrier is damaged — from over-exfoliation, harsh cleansers, retinoid use, or conditions like eczema — ceramide levels are depleted, and replenishing them is essential for recovery.

Coenzyme Q10 (Ubiquinone)

AntioxidantAnti-Aging

A naturally occurring antioxidant present in every cell that declines significantly with age. In the skin, CoQ10 protects against oxidative damage from UV radiation and pollution, supports cellular energy production in keratinocytes and fibroblasts, and reduces the depth of wrinkles. It is both an antioxidant and an energizer of the cellular processes that maintain skin health.

Copper Peptides (GHK-Cu)

Anti-AgingSoothing

GHK-Cu is a naturally occurring copper complex that declines with age (60% reduction by age 60). It is one of the most potent wound-healing and skin-remodeling signals known — it stimulates collagen, elastin, glycosaminoglycan synthesis, and new blood vessel growth while simultaneously breaking down excess scar tissue. Used in both anti-aging and post-procedure recovery.

EGF (Epidermal Growth Factor)

Anti-AgingSoothing

A signaling protein that stimulates cell growth, proliferation, and differentiation. In skincare, EGF promotes wound healing, skin renewal, and collagen production. Originally used in medical wound care and post-laser recovery, it has become popular in Korean skincare for anti-aging. It is one of the few growth factors with evidence for topical skincare efficacy.

Ferulic Acid

AntioxidantAnti-Aging

A plant-derived antioxidant found in rice bran, oats, and coffee beans that dramatically enhances the stability and photoprotective effects of vitamins C and E. The landmark 2005 study by Pinnell et al. showed that adding 0.5% ferulic acid to a vitamin C + E formulation doubled the photoprotection from SPF 4 to SPF 8 equivalent and improved the stability of vitamin C by 8x. This is why the 'CEF' combination is the most popular antioxidant serum format.

Gluconolactone (PHA)

ExfoliationHydration

A polyhydroxy acid (PHA) — the gentlest class of chemical exfoliants. Gluconolactone has a very large molecular size, so it works extremely slowly on the skin surface without penetrating deeply. This makes it ideal for extremely sensitive skin, rosacea-prone skin, and those who cannot tolerate AHAs or BHAs. It also acts as a humectant, drawing moisture into the skin as it gently exfoliates.

Glycerin

HydrationBarrier Repair

The most effective and best-studied humectant in skincare. Glycerin (glycerol) is a small molecule that penetrates the stratum corneum readily, drawing water from the atmosphere and deeper skin layers to hydrate the outer skin. Present in virtually every moisturizer and many serums. Studies show it rivals or outperforms hyaluronic acid for hydration efficacy at a fraction of the cost.

Glycolic Acid

ExfoliationAnti-AgingBrightening

The smallest and most penetrating alpha-hydroxy acid (AHA). Derived from sugarcane, glycolic acid exfoliates by dissolving the bonds between dead skin cells on the surface, revealing smoother, brighter skin underneath. It is the most studied AHA with robust evidence for improving texture, fine lines, hyperpigmentation, and overall skin radiance. The gold standard chemical exfoliant.

Green Tea Extract (EGCG)

AntioxidantAcneAnti-Aging

Epigallocatechin gallate (EGCG) is the primary polyphenol in green tea and one of the most potent topical antioxidants. It has been shown to reduce UV damage, decrease sebum production, reduce inflammation, and inhibit the enzymes that break down collagen and elastin. Green tea extract is one of the few antioxidants with evidence for both topical and oral skin benefits.

Hemp Seed Oil

HydrationSoothingAcne

Cold-pressed from Cannabis sativa seeds, hemp seed oil has an ideal 3:1 ratio of omega-6 to omega-3 fatty acids — the ratio considered optimal for skin health. It is rich in linoleic acid (which acne-prone skin is deficient in), gamma-linolenic acid (GLA, a potent anti-inflammatory), and natural vitamin E. Does not contain THC or CBD. One of the best oils for acne-prone, inflamed, or eczema-prone skin.

Hyaluronic Acid

HydrationAnti-Aging

The most popular hydrating ingredient in skincare. Hyaluronic acid (HA) is a glycosaminoglycan naturally produced by the body that can hold up to 1,000x its weight in water. In skincare, different molecular weights serve different functions: high molecular weight HA sits on the skin surface forming a moisture barrier, while low molecular weight HA penetrates deeper layers for plumping hydration.

Hydroquinone

Brightening

The most potent topical depigmenting agent available and the gold standard prescription treatment for melasma and stubborn hyperpigmentation. Hydroquinone inhibits tyrosinase more strongly than any OTC alternative. However, it carries risks with long-term use (ochronosis — paradoxical darkening) and is restricted or banned in many countries. Best used in cycles of 3-4 months under dermatologist guidance.

Jojoba Oil

Hydration

Technically a liquid wax ester (not a true oil) derived from Simmondsia chinensis seeds. Jojoba oil has a composition remarkably similar to human sebum — approximately 97% wax esters, which closely mimic the skin's natural oils. This makes it one of the most skin-compatible oils available. It provides emollient moisture, regulates sebum production, and has anti-inflammatory properties. Suitable for all skin types including oily and acne-prone.

Kojic Acid

Brightening

A natural brightening agent produced as a byproduct of sake and soy sauce fermentation. Kojic acid inhibits tyrosinase by chelating copper, which is required for the enzyme's active site. It is one of the most effective OTC alternatives to hydroquinone for treating hyperpigmentation, melasma, and age spots, though it is less stable in formulation and can cause contact sensitization over time.

Lactic Acid

ExfoliationHydrationBrightening

A gentle AHA derived from milk that provides chemical exfoliation plus hydration — a unique dual benefit. Lactic acid has a larger molecular size than glycolic acid, so it penetrates more slowly and causes less irritation, making it ideal for sensitive skin and AHA beginners. It also has humectant properties, drawing moisture into the skin as it exfoliates.

Licorice Root Extract

BrighteningSoothing

A natural brightening and anti-inflammatory ingredient derived from Glycyrrhiza glabra root. The key actives — glabridin, liquiritin, and glycyrrhizin — inhibit melanin production, reduce inflammation, and soothe irritation. Licorice root is one of the most effective and gentle brightening ingredients available, with lower irritation risk than vitamin C or hydroquinone.

Madecassoside

SoothingAnti-Aging

A purified triterpene glycoside from Centella asiatica that is the primary anti-inflammatory and wound-healing compound in the 'cica' family. While Centella asiatica extracts contain a mix of four triterpenes, isolated madecassoside provides the most potent soothing and barrier-repair effects. It is particularly effective for post-procedure recovery, sensitive skin, and skin exposed to environmental stressors like pollution and UV.

Mandelic Acid

ExfoliationAcneBrightening

The gentlest AHA, derived from bitter almonds. Mandelic acid has the largest molecular size of commonly used AHAs (152 Da), giving it the slowest skin penetration and the least irritation potential. It is also lipophilic (partially oil-soluble), giving it some ability to penetrate pores — a property unique among AHAs. Especially effective for acne-prone skin with hyperpigmentation, and safe for darker skin tones.

Mandelic Acid

ExfoliationAcneBrightening

An alpha-hydroxy acid (AHA) derived from bitter almonds with a molecular weight nearly double that of glycolic acid (152 Da vs 76 Da). This larger molecule penetrates more slowly and evenly, making mandelic acid the gentlest AHA with the least irritation potential. It is also lipophilic, giving it mild antibacterial properties similar to salicylic acid. Excellent for acne-prone, sensitive, and melanin-rich skin types.

Matrixyl (Palmitoyl Pentapeptide-4)

Anti-Aging

One of the most studied anti-aging peptides. Matrixyl is a signal peptide that mimics collagen fragments (matrikines), tricking fibroblasts into thinking collagen has been broken down and needs to be replaced. This stimulates new collagen, elastin, and hyaluronic acid production. Clinical studies show visible wrinkle reduction comparable to retinol but without any irritation.

Niacinamide

Barrier RepairBrighteningAcneAnti-Aging

A true multitasker — niacinamide (vitamin B3) addresses almost every skin concern simultaneously. It strengthens the skin barrier by boosting ceramide production, reduces hyperpigmentation by inhibiting melanosome transfer, controls sebum production, minimizes pore appearance, reduces redness, and has anti-aging benefits. One of the most versatile and well-tolerated actives in skincare.

Panthenol (Pro-Vitamin B5)

HydrationBarrier RepairSoothing

The provitamin form of vitamin B5 (pantothenic acid) that provides deep hydration, barrier repair, and wound healing support. When applied to skin, panthenol is converted to pantothenic acid, which is a component of coenzyme A — essential for fatty acid synthesis and skin barrier function. It is one of the most common ingredients in moisturizers and healing creams, and is the active ingredient in products like Bepanthen/Bepanthol.

Panthenol (Provitamin B5)

HydrationSoothing

The provitamin form of pantothenic acid (vitamin B5) that deeply penetrates the skin and converts to pantothenic acid upon absorption. It is one of the most effective and gentle hydrating and wound-healing ingredients available. Panthenol attracts and holds water, stimulates skin barrier repair, promotes wound healing, and has anti-inflammatory properties. Found in almost every well-formulated moisturizer and lip balm.

Petrolatum (Vaseline)

Barrier RepairHydration

The most effective occlusive ingredient available — petrolatum reduces transepidermal water loss (TEWL) by 99%. Despite misconceptions, it does not clog pores and does not prevent skin from 'breathing.' Dermatologists recommend it universally for barrier repair, wound healing, and locking in moisture. It is the standard against which all other moisturizing ingredients are measured.

Propolis

SoothingAcneAntioxidant

A resinous substance produced by honeybees from tree buds, used to seal and protect the hive. Propolis contains over 300 bioactive compounds including flavonoids, phenolic acids, and caffeic acid phenethyl ester (CAPE). In skincare, it provides potent anti-inflammatory, antimicrobial, and wound-healing effects. Popular in Korean skincare for acne-prone and sensitive skin.

Resveratrol

AntioxidantAnti-Aging

A polyphenol antioxidant found in grape skins, red wine, and Japanese knotweed. Resveratrol activates sirtuins — the same 'longevity genes' activated by caloric restriction — in skin cells. It has strong anti-inflammatory and antioxidant properties, and emerging research shows it can prevent UV-induced skin damage and support collagen production. Most effective when combined with other antioxidants.

Retinaldehyde

Anti-AgingAcne

The immediate precursor to retinoic acid, sitting between retinol and tretinoin in both potency and the conversion chain. Retinaldehyde requires only one enzymatic step to become active (vs two for retinol), making it significantly more effective than retinol while remaining available OTC. It also has direct antibacterial activity against C. acnes — unique among retinoids.

Retinol

Anti-AgingBrightening

The most popular over-the-counter retinoid. Retinol must be converted by skin enzymes into retinaldehyde, then into retinoic acid (tretinoin) to become active. This multi-step conversion means retinol is roughly 10-20x less potent than prescription tretinoin, but also significantly less irritating — making it the entry point for retinoid beginners.

Retinyl Palmitate

Anti-Aging

The gentlest and most stable retinoid, formed by combining retinol with palmitic acid. Retinyl palmitate requires three enzymatic conversions to become active retinoic acid, making it the least potent but also the least irritating retinoid. Commonly found in drugstore moisturizers and eye creams as a gentle anti-aging ingredient. Best for those who cannot tolerate any other retinoid.

Rosehip Seed Oil

Anti-AgingHydrationBrightening

Cold-pressed from the seeds of Rosa canina, rosehip oil is rich in linoleic acid, alpha-linolenic acid, and trans-retinoic acid (a natural form of tretinoin). This makes it one of the few plant oils with genuine anti-aging activity — the natural tretinoin content promotes cell turnover and collagen synthesis. It is also high in antioxidants and is used for scars, hyperpigmentation, and fine lines.

Salicylic Acid

AcneExfoliation

The only beta-hydroxy acid (BHA) used in skincare. Salicylic acid is oil-soluble, meaning it can penetrate into pores and dissolve the sebum and dead skin that cause blackheads and acne. This makes it fundamentally different from AHAs (which only work on the skin surface). It also has direct anti-inflammatory properties, reducing the redness and swelling of acne lesions.

Snail Mucin

HydrationSoothingAnti-Aging

Snail secretion filtrate — the mucus produced by Cryptomphalus aspersa snails — has become a star ingredient in Korean skincare. It naturally contains hyaluronic acid, glycoproteins, proteoglycans, antimicrobial peptides, copper peptides, and allantoin. This complex mixture provides hydration, wound healing, and anti-aging benefits. The COSRX Advanced Snail 96 Mucin Power Essence popularized the ingredient globally.

Snail Mucin

HydrationAnti-AgingSoothing

A complex secretion from Cryptomphalus aspersa snails containing glycoproteins, hyaluronic acid, glycolic acid, zinc, copper, allantoin, and antimicrobial peptides. This unique combination provides hydration, mild exfoliation, wound healing, and anti-inflammatory effects in a single ingredient. A cornerstone of Korean skincare, snail mucin has clinical evidence for improving skin texture, fine lines, and acne scars.

Squalane

HydrationBarrier Repair

A lightweight, non-comedogenic emollient oil derived from squalene — a lipid naturally produced by human sebaceous glands. Squalane (the hydrogenated, stable form) mimics the skin's natural oils, making it an excellent moisturizer that rarely causes breakouts. It softens skin, reduces water loss, and has antioxidant properties. Increasingly sourced from sugarcane and olives rather than shark liver.

Squalane

Hydration

The hydrogenated (stable) form of squalene, a lipid that constitutes approximately 12% of human sebum. Squalane is one of the most universally compatible facial oils — lightweight, non-comedogenic, fast-absorbing, and biocompatible with all skin types. It provides emollient moisture, supports the skin barrier, and has antioxidant properties. Modern squalane is typically derived from sugarcane or olives (not shark liver).

Sulfur

AcneExfoliation

One of the oldest acne treatments, used for centuries. Sulfur has keratolytic (exfoliating), antimicrobial, and anti-inflammatory properties that make it effective for acne, seborrheic dermatitis, and rosacea. It has a distinctive smell but is gentler than benzoyl peroxide and works well for people who cannot tolerate BP or salicylic acid. Often found in traditional 'sulfur soap' and spot treatments.

Tea Tree Oil

AcneSoothing

An essential oil from Melaleuca alternifolia with broad-spectrum antimicrobial and anti-inflammatory properties. 5% tea tree oil has been shown in clinical trials to be as effective as 5% benzoyl peroxide for inflammatory acne, with fewer side effects (though slower onset). It is the most evidence-backed essential oil in dermatology. Must be used diluted — pure tea tree oil can cause severe irritation.

Titanium Dioxide

Sun Protection

A mineral sunscreen filter that provides excellent UVB protection but less complete UVA coverage than zinc oxide. Often combined with zinc oxide in mineral sunscreens for comprehensive coverage. Titanium dioxide has a more elegant cosmetic feel than zinc oxide (less white cast, lighter texture) while maintaining the safety advantages of mineral filters.

Titanium Dioxide

Sun Protection

A mineral UV filter that provides excellent UVB and UV-A II protection. Often used alongside zinc oxide in mineral sunscreens — zinc oxide covers the full UV range while titanium dioxide boosts UVB protection. Titanium dioxide provides a more elegant (less white cast) finish than zinc oxide alone but does not protect against long-wave UVA (UVA-I). Best used in combination with zinc oxide for complete protection.

Tranexamic Acid

Brightening

Originally an oral medication for heavy menstrual bleeding, tranexamic acid (TXA) has emerged as one of the most effective treatments for melasma and stubborn hyperpigmentation that does not respond to conventional treatments. It works through a unique mechanism — blocking plasmin-mediated stimulation of melanocytes — that is different from tyrosinase inhibitors, making it an excellent combination partner.

Tranexamic Acid

Brightening

Originally a prescription blood-clotting medication, tranexamic acid has emerged as one of the most effective treatments for melasma and stubborn hyperpigmentation. It works by interrupting the UV-induced pathway that triggers melanin overproduction — specifically blocking the plasmin-to-arachidonic acid cascade. Available both orally (prescription) and topically (OTC). Particularly effective for melasma that does not respond to standard treatments.

Tretinoin

Anti-AgingAcneBrightening

The gold standard anti-aging ingredient with the most clinical evidence of any topical. Tretinoin (all-trans retinoic acid) is the active form of vitamin A that directly binds to retinoic acid receptors in skin cells. It accelerates cell turnover, stimulates collagen synthesis, reduces fine lines and wrinkles, fades hyperpigmentation, and improves skin texture. Prescription-only in most countries.

Urea

HydrationExfoliation

A natural component of the skin's Natural Moisturizing Factor (NMF) that serves as both a humectant and a keratolytic depending on concentration. At low concentrations (2-10%), urea hydrates by drawing water into the stratum corneum. At higher concentrations (20-40%), it breaks down keratin protein, making it a powerful treatment for rough, thickened, or keratotic skin conditions like keratosis pilaris, calluses, and psoriasis.

Vitamin C (L-Ascorbic Acid)

AntioxidantBrighteningAnti-Aging

The most potent topical antioxidant with strong clinical evidence for brightening, anti-aging, and photoprotection. L-Ascorbic Acid is the pure, active form that directly neutralizes free radicals, inhibits melanin production, and stimulates collagen synthesis. The challenge is formulation — it is notoriously unstable and must be at low pH (2.5-3.5) for skin penetration, which can cause irritation.

Vitamin E (Tocopherol)

AntioxidantHydration

A fat-soluble antioxidant that protects cell membranes from oxidative damage. In skincare, vitamin E is most effective when combined with vitamin C — each regenerates the other, creating a sustained antioxidant defense. It also provides moisturizing and anti-inflammatory effects. Alpha-tocopherol is the most biologically active form. Found naturally in sebum, where it serves as the first line of antioxidant defense.

Vitamin K

SoothingAnti-Aging

A fat-soluble vitamin that supports blood clotting and blood vessel integrity. In skincare, vitamin K is primarily used for dark circles under the eyes (caused by visible blood vessels), bruising, spider veins, and post-procedure redness. It strengthens capillary walls and supports the reabsorption of blood that has leaked from damaged vessels. Often combined with retinol and vitamin C in eye creams.

Witch Hazel

SoothingAcne

An astringent extract from Hamamelis virginiana bark and leaves with anti-inflammatory and antioxidant properties. Traditional uses include treating acne, reducing pore appearance, and soothing irritated skin. However, many commercial witch hazel toners contain high concentrations of alcohol that can dry and damage the skin barrier. Alcohol-free witch hazel is the preferred form for skincare.

Zinc Oxide

Sun ProtectionSoothing

The gold standard mineral (physical) sunscreen filter. Zinc oxide provides the broadest spectrum UV protection of any single ingredient, covering the entire UVA and UVB range. It works by physically reflecting and scattering UV photons rather than absorbing them (though new research shows it also absorbs some UV energy). It is the only sunscreen filter generally recognized as safe for all ages, including infants.

Zinc Oxide

Sun ProtectionSoothing

A mineral UV filter that provides broad-spectrum protection against both UVA and UVB rays by physically reflecting and absorbing UV radiation. Zinc oxide is the only single ingredient that provides true broad-spectrum protection across the entire UV range. It is also anti-inflammatory, antibacterial, and soothing — making it ideal for acne-prone, sensitive, and rosacea-prone skin. The gold standard mineral sunscreen ingredient.

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