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 chloride is common table salt, used in skincare products as a texture modifier, preservative, and to help balance formulations. In small amounts, it's generally well-tolerated by skin.
Benefits
Helps preserve product stability
Can enhance skin hydration when used in appropriate concentrations
Improves product texture and consistency
Potential concerns
High concentrations may irritate sensitive or compromised skin
Excessive topical salt exposure can potentially disrupt skin barrier function
May cause dryness or tightness in some individuals
Science: Sodium chloride is a naturally occurring electrolyte essential to skin physiology. Research indicates the skin actively regulates sodium levels through complex mechanisms involving the endothelium, immune cells, and lymphatics; however, peer-reviewed data specifically addressing topical sodium chloride in cosmetic formulations at typical use levels is limited.
Salicylic acid is a beta hydroxy acid (BHA) that works by gently exfoliating the skin's surface and penetrating pores to remove dead skin cells and excess oil. It's commonly used in acne treatments and can help improve skin texture and clarity.
Benefits
Helps reduce acne breakouts by unclogging pores
Gently exfoliates to improve skin texture
May help fade dark spots and improve uneven skin tone when used as part of combination treatments
Potential concerns
Can cause dryness, irritation, or sensitivity, especially with frequent use or in higher concentrations
May increase sun sensitivity, so daily sunscreen is recommended
Not recommended during pregnancy without consulting a healthcare provider
Science: Salicylic acid is recognized as a first-line topical acne treatment and is considered safe for most users. Research also supports its use as an adjuvant therapy for melasma and hyperpigmentation when combined with other treatments. Start with lower concentrations and introduce gradually to minimize irritation.
Shea butter is a natural fat extracted from the nuts of the shea tree, native to Africa. In skincare, it works as a moisturizer and conditioning agent, helping to soften and protect the skin by forming a protective barrier.
Benefits
Deep moisturizing and hydration
Skin conditioning and softening
May help reduce appearance of dry patches
Potential concerns
May cause sensitization in some individuals—formulations should be tested for non-sensitizing properties
Quality varies depending on processing; impurities in poorly processed shea butter could be a concern
Science: A 2024 safety assessment by the Cosmetic Ingredient Review Expert Panel concluded that shea-derived ingredients are safe at current concentrations and practices of use when formulated to be non-sensitizing. The Panel noted that formulators should be aware of similar constituents in other botanical ingredients to avoid hazardous levels when combined, and should use good manufacturing practices to limit impurities.
