Skin & Hair Glossary of ingredients & terms. Defining hair and skin ingredients with meaningful results. Updated regularly.
- K (Vitamin)
- Vitamin K is popular in under-eye creams as it is reputed to lighten dark circles. Vitamin K reverses the calcium deposits in elastin fibers. These deposits harden and cause wrinkles. Vitamin K helps with blood coagulation and circulation. A study in the Journal of Cosmetic Dermatology showed topical Vitamin K works best when paired with retinol, Vitamins C, E, and the Bs. (1) Vitamin K is also called Phytonadione.
- Kaolin Clay
- Kaolin Clay is a natural clay that absorbs oil and removes impurities. Ideal for treating oily and acne prone skin.
- A Keratinocyte is the cell type responsible for keratin formation in the skin.
- Kelp Extract
- Kelp Extract contains minerals and removes toxins. It lessens redness, inflammation, rosacea and protects against environmental damage. Kelp has powerful anti-aging properties.
- The structural protein of skin, hair, and nails. Hair is about 80% Keratin.
- Keratosis Pilaris
- Keratosis Pilaris, also known as KP or Chicken Bumps, are hardened keratin plugs that appear like acne. They are not harmful unless they become infected from scratching. They can be unsightly and look like acne or a rash. KP responds to Retinols and washing with mild soaps.
- Kernel Oil
- Kernel Oil deeply conditions the hair and has nourishing vitamins for the scalp.
- Kojic acid
- Kojic acid is an anti-oxidant that helps sun-damaged skin. It is a natural skin lightening agent that lightens sun damage induced hyperpigmentation by inhibiting the future production of excess melanin.
- Mitsuishi, T. , Shimoda, T. , Mitsui, Y. , Kuriyama, Y. and Kawana, S. (2004), The effects of topical application of phytonadione, retinol and vitamins C and E on infraorbital dark circles and wrinkles of the lower eyelids. Journal of Cosmetic Dermatology, 3: 73-75. doi:10.1111/j.1473-2130.2004.00070.x