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.
Niacinamide is an active form of vitamin B3 that works within your skin's cells to strengthen the barrier, reduce inflammation, and regulate oil production. It's a water-soluble ingredient that's been shown to have multiple benefits across different skin concerns, from sensitivity to aging.
Benefits
Reduces redness and calms irritation
Minimizes pore appearance and controls excess oil
Supports skin barrier function and hydration
Brightens skin tone and evens complexion
Has anti-aging properties and protects against environmental damage
Science: Niacinamide is well-tolerated and safe across diverse skin types with strong clinical evidence supporting its use for acne, dermatitis, and general skin health. Research shows it works by regulating inflammation at the cellular level and protecting skin barrier integrity, with proven efficacy in concentrations commonly found in cosmetic products.
Sodium Hydroxide is a strong alkaline chemical used in skincare products primarily as a pH buffer to neutralize acids and adjust the product's pH to safe levels for skin. It is not an active skincare ingredient and appears only in trace amounts in finished products.
Potential concerns
In concentrated form, sodium hydroxide is caustic and can cause severe chemical burns; however, in cosmetic products it is diluted and pH-buffered to safe levels
Undiluted or highly concentrated sodium hydroxide should never contact skin directly
Science: The provided research discusses sodium hydroxide only in a specialized medical context (10% solution for surgical cauterization of ingrown toenails), which is not relevant to cosmetic skincare use. In properly formulated skincare products, sodium hydroxide is used in minimal concentrations solely for pH adjustment and is considered safe by regulatory bodies including the FDA and EU.
Disodium EDTA is a chelating agent that binds to metals and minerals in skincare formulations. It helps stabilize products, prevent discoloration, and improve texture by controlling how other ingredients behave in the formula.
Benefits
Stabilizes skincare formulations and extends shelf life
Prevents oxidation and discoloration of products
Improves product texture and consistency
Potential concerns
May increase skin penetration of other ingredients in the formula
Not absorbed through skin under normal use, but inhalation from sprays should be minimized
Can cause irritation at high concentrations, though typical use levels (under 2%) are considered safe
Science: The Cosmetic Ingredient Review Expert Panel confirmed in 2023 that disodium EDTA is safe at typical cosmetic use concentrations (under 2%). Research shows it is not absorbed through intact skin, though it may affect how other ingredients penetrate skin due to its mineral-binding properties. No carcinogenic effects have been identified.
Xylitol is a naturally occurring sugar alcohol that functions as a humectant in skincare, helping to draw moisture into the skin and maintain hydration. It has been safely used in cosmetics, food, and pharmaceuticals for over 50 years.
Benefits
Hydrates and moisturizes skin by drawing water into the outer layers
Gentle humectant suitable for sensitive skin types
Does not trigger rapid blood sugar spikes like regular sugar
Science: Xylitol is endogenously produced in the body and has an established safety history spanning decades of use across multiple industries. Recent cardiovascular research found no significant risk links in clinical studies, though some pilot trials suggest temporary platelet effects at very high doses—irrelevant to topical skincare application.
Hexyldecanol is a fatty alcohol commonly used in skincare formulations as an emollient and texture enhancer. Research suggests it may help reduce the appearance of dark spots and hyperpigmentation by supporting the skin's natural protein breakdown processes.
Benefits
May help reduce appearance of dark spots and hyperpigmentation
Provides emollient properties to soften skin
Helps improve texture and feel of skincare products
Potential concerns
Rare cases of contact dermatitis reported in sensitive individuals
May cause irritation in people with alcohol sensitivities
Science: A clinical study in 110 participants found that topical hexyldecanol significantly reduced the appearance of facial hyperpigmented spots compared to vehicle control, working by upregulating proteasomal activity in melanocytes. However, isolated case reports of severe contact dermatitis exist, suggesting it may trigger reactions in susceptible individuals.
Mannitol is a natural sugar alcohol that acts as a humectant and osmotic agent in skincare products. It helps draw moisture into the skin and can provide a smooth texture to formulations.
Benefits
Hydration and moisture retention
Smooth product texture
Potential skin barrier support
Potential concerns
May cause irritation in very high concentrations
Can be hygroscopic and may affect product stability if exposed to humidity
Science: Mannitol is recognized in medical literature as a non-toxic osmotic agent used in various pharmaceutical applications. Limited peer-reviewed data is available specifically for topical skincare efficacy, though it is well-established as a safe ingredient in cosmetic formulations and is used in advanced dermal fillers combined with hyaluronic acid.
