BHT (butylated hydroxytoluene) is a synthetic antioxidant used in skincare products to prevent oils and other ingredients from oxidizing and going rancid. It's used at very low concentrations (0.0002% to 0.5%) to extend shelf life.
Benefits
Prevents product degradation and extends shelf life
Keeps formulations stable over time
Allows use of beneficial oils without them spoiling
Potential concerns
Can cause skin irritation or allergic reactions in sensitive individuals at higher concentrations
May cause mild contact sensitization in some people
Minimal systemic absorption when applied to skin, but oral ingestion studies show potential liver and kidney effects at high doses
Science: The Cosmetic Ingredient Review Expert Panel concluded BHT is safe as used in cosmetic formulations at typical concentrations. When applied to skin, BHT remains largely in the skin with minimal systemic absorption, unlike oral exposure which showed some toxic effects in animal studies at high doses.
Squalane is a lightweight, skin-identical oil derived from squalene (a natural component of human sebum). It absorbs easily into the skin to lock in moisture and create a smooth, soft feel without leaving a greasy residue.
Benefits
Hydrates and moisturizes skin
Mimics skin's natural oils for better compatibility
Lightweight emollient that doesn't clog pores
Antioxidant properties
Well-tolerated by most skin types
Science: The Cosmetic Ingredient Review Expert Panel confirmed squalane is safe for cosmetic use at typical concentrations (2023). Research demonstrates skin hydrating and emollient activity, and squalane is naturally present in human sebum at ~13%, making it biocompatible with skin.
Caprylic/capric triglyceride is a lightweight oil derived from coconut or palm oil. In skincare products, it acts as an emollient and helps formulations spread smoothly while creating a protective barrier on the skin's surface to lock in moisture.
Benefits
Improves skin hydration by reducing water loss from the skin
Lightweight texture that absorbs quickly without feeling greasy
Helps stabilize and improve the texture of skincare formulations
Science: Research shows that emulsions containing 15% caprylic/capric triglyceride significantly increase skin hydration and reduce transepidermal water loss (TEWL) through occlusion. The ingredient is also commonly used as a carrier oil in advanced delivery systems for other active ingredients, demonstrating good skin compatibility and efficacy as a cosmetic base.
Retinol is a form of vitamin A that works by stimulating skin cell turnover and boosting collagen production. It's one of the most well-researched anti-aging ingredients, helping to improve skin texture, reduce fine lines, and strengthen the deeper layers of your skin.
Benefits
Reduces the appearance of fine lines and wrinkles
Improves skin texture and smoothness
Decreases hyperpigmentation and age spots
Thickens the epidermis and dermis over time
Supports skin barrier function
Potential concerns
Can cause initial redness, stinging, and skin scaling, especially when first introduced
May increase sun sensitivity — daily SPF is essential when using retinol
Not recommended during pregnancy without medical guidance
Can be irritating for sensitive skin types; start with low concentrations
Science: Clinical studies confirm retinol significantly improves photoaging, wrinkle appearance, and hyperpigmentation. While effective, retinol is more likely to cause irritation and scaling than gentler alternatives like bakuchiol, though both show similar efficacy for anti-aging benefits.
