Glycerin is a naturally derived humectant—a ingredient that draws moisture from the air into your skin. It's one of the most widely used and well-studied moisturizing agents in skincare, helping skin feel softer and more hydrated.
Benefits
Attracts and retains moisture in the skin
Improves skin hydration and softness
Helps strengthen skin barrier function
Suitable for most skin types, including sensitive skin
Science: The Cosmetic Ingredient Review Expert Panel concluded glycerin is safe as used in cosmetics across all concentrations. Research shows glycerin effectively improves skin hydration and is well-tolerated with minimal irritation risk. It is also referenced in clinical guidelines for managing inflammatory skin conditions and maintaining skin integrity.
Sodium hyaluronate is the salt form of hyaluronic acid, a naturally occurring substance found in your skin that acts like a moisture magnet. In skincare products, it absorbs water from the environment and binds it to your skin, helping to hydrate and plump the skin's surface.
Benefits
Delivers intense hydration to the skin
Helps reduce the appearance of fine lines by improving skin moisture
Supports skin barrier function
Suitable for all skin types, including sensitive and oily skin
Potential concerns
In very dry climates with low humidity, it may draw moisture from deeper skin layers if not sealed with an occlusive product
Rare allergic reactions are possible but extremely uncommon
Science: While the provided research focuses on intra-articular injections for joint health (showing good safety and efficacy), hyaluronic acid and its salt form are well-established in dermatology for topical hydration. The molecule's safety profile is well-documented across decades of use in medical and cosmetic applications, with severe adverse reactions being extremely rare.
Citric acid is a naturally occurring organic acid commonly used in skincare products as an exfoliant and pH balancer. It belongs to a group of ingredients called alpha-hydroxy acids (AHAs) that help remove dead skin cells from the surface.
Benefits
Gentle exfoliation to improve skin texture and appearance
Helps reduce the appearance of keratosis and acne
Balances product pH to maintain skin compatibility
Potential concerns
Can cause irritation, redness, or sensitivity in some users, especially with prolonged or frequent use
May increase sun sensitivity — sunscreen use is recommended when using AHA products
Not suitable for very sensitive or compromised skin without caution
Science: Citric acid is an established AHA used in cosmetics for superficial peeling and skin appearance improvement, though research emphasizes that caution should be exercised due to potential adverse reactions. It is widely produced industrially and well-established in skincare formulations.
Pentylene glycol is a lightweight humectant—a ingredient that draws water into the skin to improve hydration and texture. It's commonly used in serums, sunscreens, and moisturizers as a preservative booster and skin-conditioning agent.
Benefits
Improves skin hydration by attracting moisture
Lightweight feel, absorbs quickly without heaviness
Helps preserve product stability and extends shelf life
Potential concerns
Rare contact allergy reported in sensitive individuals
Emerging evidence suggests it may be an uncommon cosmetic allergen—if you have sensitive or reactive skin, patch test first
Science: Safety studies show a high margin of safety at standard use levels (87–671 in adults), with minimal skin penetration due to the ingredient's volatility. However, recent dermatological reports flag pentylene glycol as an emerging contact allergen in some individuals, warranting attention for those with sensitive skin.
Panthenol is a lightweight humectant derived from pantothenic acid (vitamin B5) that draws moisture into the skin and helps maintain hydration. It also supports the skin barrier and can help soothe irritation, making it a popular choice in products designed for sensitive or compromised skin.
Benefits
Hydrates and moisturizes the skin
Helps calm and soothe irritated or sensitive skin
Supports skin barrier function and repair
Lightweight and non-greasy
Science: Panthenol is one of the few ingredients in sensitive skin formulations with clinical evidence specifically tested on volunteers with sensitive skin. Research confirms it reduces skin inflammation and supports barrier function, though comprehensive clinical studies on this ingredient remain limited compared to some alternatives.
Water is the most common ingredient in skincare products, serving as a solvent that dissolves and carries other active ingredients into your skin. It helps hydrate the outer layer of skin and provides the base for creams, serums, and lotions to work effectively.
Benefits
Hydrates and plumps the skin
Helps deliver other active ingredients
Essential base for product texture and consistency
Science: Water is universally recognized as safe for topical application and is essential for skin hydration and barrier function. It has been used in skincare formulations for centuries with no adverse effects.
