The parts being used for this extract are the seeds. Other parts, for example, the bark have been used as a yellow dye. INCI Name Aesculus hippocastanum horse chestnut seed extract.Horse Chestnut extract has antiinflammatory and astringent properties and can be found in salves for varicose veins, body wraps for cellulite but also in facial toners, cleansers and moisturizers for antiblotchiness.Hair Care Hair will benefit from the extract from its fatty acids, proteins and shortchain sugars. Hair is damaged by dyes, hair dryers and chemical treatments that make hair weak and brittle, hindering its ability to retain water. The extract is said to protect hair from this daily damage without causing buildup and usually imparts a glossy look Use Add to formulas as is, typical use level 5 10.