Shea Butter

シアバター

Also known as: Butyrospermum Parkii Butter, Karite Butter

Moisturizer Generally recognized as safe for cosmetic use. Listed as Butyrospermum Parkii Butter in INCI nomenclature. Considered non-comedogenic despite its rich texture. strong evidence

What It Does

A rich, nourishing butter extracted from African shea tree nuts, prized for its intensive moisturizing and skin-protective properties.

Shea butter is one of the most beloved natural moisturizers in skincare, extracted from the nuts of the African shea (karite) tree. It contains a complex mixture of fatty acids, including oleic acid, stearic acid, and linoleic acid, along with vitamins A, E, and F, making it an exceptionally nourishing ingredient for skin and lips.

The rich, emollient texture of shea butter makes it ideal for dry skin, lips, and areas prone to moisture loss. Beyond simple moisturization, shea butter contains bioactive compounds like triterpenes, phytosterols, and tocopherols that provide anti-inflammatory and antioxidant benefits. It helps reinforce the skin barrier, improve elasticity, and soothe irritation while delivering long-lasting hydration.

In Japanese beauty products, shea butter is commonly found in lip care, body care, and intensive moisturizing formulations. Its compatibility with other ingredients and pleasant skin feel make it a versatile component in both minimalist formulations and complex multi-ingredient products. The butter's natural UV-protective properties (though not sufficient as sole sun protection) add additional value in protective skincare formulations.

How It Works

Shea butter's fatty acid composition closely mimics the skin's natural lipid profile, allowing it to integrate seamlessly into the skin barrier and provide occlusive protection against moisture loss. The triterpene alcohols (lupeol, alpha-amyrin, beta-amyrin) provide anti-inflammatory benefits and help soothe irritated skin. Vitamins A and E act as antioxidants, protecting skin from free radical damage while supporting skin regeneration and repair processes.

The Japanese Context

While not a traditional Japanese ingredient, shea butter has been enthusiastically adopted in Japanese skincare and cosmetics for its superior emollient properties. Japanese brands often use refined shea butter in lip care and hand creams, appreciating its ability to provide rich moisture without heaviness. The ingredient fits well with the Japanese philosophy of protecting and nurturing the skin barrier.

Best For

All skin types skinespecially dry skinsensitive skinor mature skin skin Dryness chapped lips rough texture sensitivity eczema

How It's Used

Typical concentration: Typically used at 1-25% in skincare formulations, with higher concentrations in intensive treatments and lip products

Ingredient Interactions

Avoid combining with

Side Effects and Cautions

Generally well-tolerated. Rare allergic reactions possible, primarily in individuals with tree nut allergies (though shea is technically a seed, not a nut).

Products With Shea Butter