Alum

Category: Astringent

Brief description: Alum, or potassium alum, is a naturally occurring sulfate mineral used for its astringent properties.

Benefits: Helps to tighten the skin, reduce inflammation, and stop minor bleeding (such as from shaving nicks).

Skin type suitability/concerns: Suitable for most skin types, especially oily and acne-prone skin.

Target audience: Individuals with oily skin, or for use in after-shave products.

Chemical composition: Potassium aluminum sulfate.

Physical aspect: White, crystalline solid.

Compatibility: Generally compatible with other ingredients.

Concentration: Varies based on the product formulation.

Side effects/adverse reactions: Can cause skin irritation in some individuals.

Regulatory status: Generally recognized as safe for use in cosmetics.

Sustainability/ethical considerations: Naturally sourced mineral. Sustainability depends on mining practices.