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Highlights
WHAT IS IT?
PHA Toner with Polyhydroxy Acid
FEATURES
Gentle chemical exfoliant, removes dead cells, locks in moisture
BEST FOR
sensitive
CHECKS
Free of parabens, phthalates, sulfates, synthetic fragrances, gluten
Who Is It For?
All Ages And Genders With Sensitive Skin
What Does It Help With?
Dull Skin
Enlarged Pores
Uneven Skin Tone
Mild To Severe Acne
Budget
Affordable (under $30)
How To Use
Which routine should it be used in?
Morning
Evening
Cleanse
Tone
Eyecare
Serum
Moisturize
Suncare
Instructions:
Saturate a cotton pad and apply AM and PM
Key Information
Vegan
Cruelty-free
Sensitive-safe
Non-comedogenic
Hypoallergenic
Microbiome-safe
Preservative-free
Eco-friendly
Pregnancy-safe
Oil-free
What Inkey List Says
Product Description:
PHA Toner (Polyhydroxy Acid) is a gentle chemical exfoliant and toner for sensitive skin. Made of large molecules, it removes dead cells from the surface layer of the skin, while naturally locking in moisture.
About the Brand:
Democratizing skincare knowledge and ingredients, The INKEY List offers straightforward, single-ingredient-focused products at accessible price points. Founded in 2018 by Colette Laxton and Mark Curry, this educational brand demystifies skincare through transparency and simplicity. Experience high-performance actives without confusing formulations or premium pricing, supported by straightforward guidance for building personalized routines.
Aloe Barbadensis Leaf Juice, derived from the Aloe vera plant, is a potent skincare ingredient renowned for its soothing and hydrating properties. This clear, gel-like substance is rich in vitamins, minerals, amino acids, and polysaccharides, making it a versatile component in various skincare formulations. Its anti-inflammatory properties help reduce redness and irritation, making it particularly beneficial for sensitive or compromised skin.
The juice contains acemannan, a complex carbohydrate that promotes skin healing and stimulates collagen production. It also exhibits antimicrobial qualities, potentially aiding in the management of acne-prone skin. Aloe Barbadensis Leaf Juice has excellent moisturizing capabilities, forming a protective barrier on the skin to prevent water loss without clogging pores.
Research suggests that this ingredient may have antioxidant properties, helping to neutralize free radicals and protect the skin from environmental stressors. Its cooling effect can provide relief from sunburn and minor skin irritations. When incorporated into skincare products, Aloe Barbadensis Leaf Juice can enhance overall skin hydration, promote a more even skin tone, and contribute to a smoother, healthier-looking complexion.
Gluconolactone
Gluconolactone is a polyhydroxy acid (PHA) that has gained significant attention in the skincare industry for its multi-faceted benefits. This gentle exfoliant is derived from gluconic acid, a naturally occurring substance found in fruits and honey. Unlike alpha-hydroxy acids (AHAs), gluconolactone has a larger molecular structure, allowing for slower penetration and reduced irritation, making it suitable for sensitive skin types.
As a humectant, gluconolactone effectively attracts and retains moisture, enhancing skin hydration and improving barrier function. Its antioxidant properties help neutralize free radicals, protecting the skin from environmental stressors and premature aging. Gluconolactone also exhibits chelating abilities, which can help reduce the negative effects of metal ions on the skin.
In skincare formulations, gluconolactone is typically used at concentrations between 3% and 15%. It can be combined with other active ingredients to enhance overall product efficacy. Regular use of gluconolactone-containing products may lead to improved skin texture, reduced appearance of fine lines, and a more even skin tone. Its gentle nature and multiple benefits make it a versatile ingredient suitable for various skin types and concerns.
Glycerin
Glycerin, also known as glycerol, is a versatile and widely used humectant in skincare formulations. This colorless, odorless, viscous liquid is derived from both natural and synthetic sources, including vegetable oils and petrochemicals. As a hygroscopic substance, glycerin attracts and retains moisture, making it highly effective in hydrating and moisturizing the skin.
In skincare products, glycerin typically comprises 0.5% to 5% of the formulation. It functions by drawing water from the environment and deeper skin layers to the surface, enhancing skin hydration and improving barrier function. This moisture-binding property helps to reduce transepidermal water loss, leading to smoother, more supple skin.
Glycerin's low molecular weight allows it to penetrate the stratum corneum, providing hydration to deeper skin layers. It also exhibits emollient properties, helping to soften and smooth the skin's surface. Additionally, glycerin has been shown to enhance the penetration of other active ingredients in skincare formulations.
While generally well-tolerated, high concentrations of glycerin can potentially cause a tacky feel on the skin or draw out too much moisture in low-humidity environments. Therefore, it is often combined with other moisturizing agents for optimal efficacy and skin feel.
Niacinamide
Niacinamide, also known as nicotinamide or vitamin B3, is a versatile and well-researched skincare ingredient with numerous benefits for various skin types and concerns. This water-soluble vitamin plays a crucial role in cellular energy production and repair processes within the skin.
Niacinamide is renowned for its ability to improve skin barrier function by increasing ceramide production, which helps retain moisture and protect against environmental stressors. It has been shown to regulate sebum production, making it beneficial for those with oily or acne-prone skin. The ingredient also possesses anti-inflammatory properties, helping to soothe irritated skin and reduce redness associated with conditions like rosacea.
Furthermore, niacinamide has demonstrated efficacy in improving skin tone and texture by inhibiting melanosome transfer to keratinocytes, thus reducing the appearance of hyperpigmentation and dark spots. It can also stimulate collagen production, contributing to improved skin elasticity and reduction of fine lines.
Typically used in concentrations between 2% and 5%, niacinamide is well-tolerated by most skin types and can be easily incorporated into various skincare formulations, including serums, moisturizers, and toners.
Peg-40
Hydrogenated
Castor
Oil
PEG-40 Hydrogenated Castor Oil is a versatile synthetic ingredient widely used in cosmetic and personal care formulations. This water-soluble emollient and emulsifier is derived from castor oil through a process of hydrogenation and ethoxylation. Its primary function is to enhance the solubility and dispersion of other ingredients, particularly essential oils and fragrances, in water-based products.
The "PEG-40" in its name indicates that it contains 40 units of polyethylene glycol, which contributes to its excellent solubilizing properties. This ingredient helps create stable emulsions and can improve the texture and consistency of various skincare and haircare products. It acts as a surfactant, reducing surface tension between oil and water phases, thus facilitating the mixing of otherwise incompatible ingredients.
PEG-40 Hydrogenated Castor Oil is generally considered safe for use in cosmetics and is non-irritating to the skin. It can be found in a wide range of products, including cleansers, toners, serums, and hair conditioners. While it provides minimal direct skin benefits, its role in formulation is crucial for creating effective and aesthetically pleasing products. However, individuals with extremely sensitive skin should perform a patch test before using products containing this ingredient.
Pentylene
Glycol
Pentylene Glycol is a versatile synthetic ingredient widely used in skincare and cosmetic formulations. This clear, colorless liquid acts as a multifunctional component, serving as a humectant, solvent, and preservative enhancer. Its molecular structure allows it to attract and retain moisture, helping to keep the skin hydrated and improving product texture.
As a humectant, Pentylene Glycol draws water from the environment and deeper skin layers to the surface, promoting a plump and moisturized appearance. Its solvent properties aid in dissolving and dispersing other ingredients, enhancing product stability and efficacy. Additionally, it exhibits mild antimicrobial activity, contributing to product preservation and extending shelf life.
Pentylene Glycol is generally well-tolerated by most skin types and is often used in concentrations ranging from 1% to 5%. It can be found in various skincare products, including moisturizers, serums, and toners. While it shares some similarities with other glycols, such as Propylene Glycol, Pentylene Glycol is often preferred for its lower potential for irritation and its ability to penetrate the skin barrier effectively, potentially enhancing the delivery of other active ingredients.
Potassium
Sorbate
Potassium sorbate is a widely used preservative in skincare and cosmetic formulations, recognized for its effectiveness against yeasts and molds. This white, crystalline powder is the potassium salt of sorbic acid, a naturally occurring compound found in some berries. In skincare products, potassium sorbate functions primarily to extend shelf life and maintain product integrity by inhibiting microbial growth.
With a pH range of 4.5-6.5, potassium sorbate is particularly suitable for slightly acidic formulations. It exhibits broad-spectrum antimicrobial activity, especially against fungi, while being less effective against bacteria. This preservative is often used in conjunction with other antimicrobial agents to provide comprehensive protection against various microorganisms.
Potassium sorbate is generally considered safe for use in cosmetics and is approved by regulatory bodies worldwide. It is non-irritating and non-sensitizing for most individuals, making it suitable for a wide range of skin types. The ingredient is water-soluble and typically used at concentrations of 0.1-0.5% in skincare formulations. Its efficacy can be influenced by factors such as pH, water activity, and the presence of other ingredients in the product.
Ppg-26-buteth-26
PPG-26-Buteth-26 is a synthetic polymer that functions as a solubilizer and emulsifier in skincare and cosmetic formulations. This versatile ingredient is particularly useful for incorporating oil-soluble components into water-based products, enhancing their stability and efficacy. Its chemical structure consists of polypropylene glycol (PPG) and polyethylene glycol (PEG) units, which contribute to its excellent solubilizing properties.
In skincare applications, PPG-26-Buteth-26 helps to create clear, homogeneous solutions by dispersing hydrophobic ingredients such as essential oils, fragrances, and certain active compounds. This ensures even distribution throughout the product and prevents separation or settling. The ingredient also aids in improving the texture and spreadability of formulations, contributing to a smoother application experience.
PPG-26-Buteth-26 is generally considered safe for use in cosmetics and is approved by regulatory bodies in various concentrations. It is non-irritating and well-tolerated by most skin types. However, as with any synthetic ingredient, some individuals may experience sensitivity. Its effectiveness in solubilizing and emulsifying makes it a valuable component in a wide range of skincare products, including serums, toners, and lightweight moisturizers.
Propanediol
Propanediol, also known as 1,3-propanediol, is a versatile and increasingly popular ingredient in skincare formulations. This clear, colorless liquid is derived from corn sugar through a fermentation process, making it a sustainable alternative to petroleum-based glycols. Propanediol functions as a solvent, humectant, and emollient in skincare products, offering multiple benefits for the skin.
As a humectant, propanediol attracts and retains moisture, helping to keep the skin hydrated and plump. Its low molecular weight allows for efficient penetration into the skin, enhancing the delivery of other active ingredients. This property makes it an excellent choice for improving the efficacy of various skincare formulations.
Propanediol also acts as a preservative booster, helping to maintain product stability and extend shelf life. It has a low irritation potential, making it suitable for sensitive skin types. Additionally, this ingredient can improve the texture and spreadability of products, enhancing the overall user experience.
In cosmetic formulations, propanediol is commonly used in concentrations ranging from 1% to 10%, depending on the product type and desired effects. Its multifunctional nature and skin-friendly profile make it a valuable addition to a wide range of skincare products, from serums and moisturizers to toners and masks.
Sodium
Benzoate
Sodium benzoate is a widely used preservative in skincare and cosmetic formulations. This white, crystalline powder is the sodium salt of benzoic acid and is highly effective at inhibiting the growth of bacteria, yeasts, and molds in products with a pH below 5.5. Its antimicrobial properties help extend the shelf life of various skincare products, including cleansers, toners, and moisturizers.
In formulations, sodium benzoate typically appears at concentrations between 0.1% and 0.5%. It is water-soluble and works synergistically with other preservatives like potassium sorbate to provide broad-spectrum protection against microbial contamination. This ingredient is particularly useful in water-based products and emulsions.
While generally considered safe for use in cosmetics, sodium benzoate may cause irritation in some individuals with sensitive skin. It's important to note that in the presence of ascorbic acid (vitamin C), sodium benzoate can potentially form small amounts of benzene, a known carcinogen. Therefore, formulators must carefully consider product composition and pH levels when using this preservative.
Sodium benzoate is approved for use in personal care products by regulatory bodies worldwide, including the FDA and EU Cosmetics Regulation, making it a reliable choice for maintaining product stability and safety.