Kaolin Clay: A type of soft, white clay often used in skincare for its absorbent properties. It draws out impurities, excess oil, and toxins from the skin, making it ideal for oily or acne-prone skin types.

Kava Extract: Extracted from the root of the kava plant, known for its calming and anti-inflammatory properties. In skincare, it’s used to reduce redness, irritation, and provide a soothing effect, particularly for sensitive or stressed skin.

Keratine: A fibrous protein found in the skin, hair, and nails that provides structural support. It is often used in hair treatments to strengthen and repair damaged hair, restoring its natural shine and smoothness.

Keratolytic: A type of ingredient that helps to exfoliate the skin by breaking down the bonds between dead skin cells, allowing them to shed more easily. Common keratolytic agents include salicylic acid and urea, which are used in treatments for conditions like acne, calluses, and psoriasis.

Keratosis: A condition characterized by the overgrowth of keratin, often leading to thick, rough patches of skin. It can occur in conditions like seborrheic keratosis, where benign growths appear on the skin, or actinic keratosis, which may develop into skin cancer.

Kojic Acid: A natural ingredient derived from fungi, often used in skincare to lighten hyperpigmentation and even skin tone. It works by inhibiting the production of melanin, the pigment responsible for dark spots and discoloration.

Kombucha: A fermented tea that contains probiotics, antioxidants, and organic acids, often used in skincare for its soothing, detoxifying, and skin-balancing properties. It is believed to improve the skin’s barrier and promote a healthy microbiome.

Kombucha Ferment: The liquid produced from fermenting tea leaves with a symbiotic colony of bacteria and yeast (SCOBY), used in skincare for its antioxidant, detoxifying, and soothing properties to promote healthy, balanced skin.