Gelatin capsules, informally called gel caps or gelcaps,
are composed of gelatin manufactured from the collagen of animal
skin or bone.Gelatin
capsules have an outer coating or shell containing the active
ingredient and any filler. The shell is made of gelatin, usually
derived from beef, along with water and a plasticizing agent such
as glycerin to provide durability with flexibility. Gelatin
capsules have advantages for both the drug and supplement
manufacturer and the consumer.