Propylene glycol is a lightweight humectant and solvent commonly used in skincare formulations. It helps draw moisture into the skin and improves the texture and spreadability of products.
Benefits
Hydrates skin by attracting and retaining moisture
Enhances product texture and makes formulas easier to apply
Helps active ingredients penetrate the skin more effectively
Improves stability and shelf life of formulations
Potential concerns
May cause contact dermatitis or irritation in sensitive individuals
Can occasionally trigger allergic reactions in susceptible people
High concentrations may feel sticky or heavy on some skin types
Science: Research confirms propylene glycol acts as a penetration enhancer in topical formulations, improving skin uptake of active ingredients. The ingredient is widely studied and considered safe at typical cosmetic concentrations, though individual sensitivity varies.
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.
Cucumber fruit extract is a plant-derived ingredient made from pressed or fermented cucumber. It's lightweight and contains natural compounds like vitamins, minerals, and antioxidants that can help soothe and hydrate skin.
Benefits
Hydrating and refreshing
May help soothe mild irritation or redness
Light antioxidant properties
Science: Limited peer-reviewed data available for this ingredient. Cucumber is generally recognized as very safe in cosmetics and has a long history of traditional use in skincare, though specific efficacy claims lack robust clinical support.
Fructooligosaccharides (FOS) are a type of prebiotic fiber made from short chains of fructose molecules. In skincare, they're added to support the skin's microbiome and may work by feeding beneficial bacteria, potentially helping reduce inflammation and improve skin barrier health.
Benefits
May support a healthy skin microbiome by feeding beneficial bacteria
Potential anti-inflammatory effects when absorbed or applied topically
May help improve skin barrier function and reduce irritation
Potential concerns
Limited topical skincare data; most evidence comes from oral/gut health studies
May cause mild fermentation or gas if ingested in large amounts, though this is less relevant for topical use
Science: Research demonstrates that FOS as an oral prebiotic (combined with probiotics) can shift gut microbiota toward an anti-inflammatory profile and improve skin outcomes in inflammatory conditions like psoriasis. However, direct topical efficacy data in cosmetic skincare products is limited; most evidence relates to oral supplementation and systemic skin health.
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.
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.
