Coix seed belongs to Gramineae, and there are two kinds, one is Chuangu and the other is Coix seed. So coix seed is actually a kind of coix seed. Coix seed is a general term for Coix seed and other Coix seeds. Chuangu shell is hard and thick, commonly known as bodhi. Coix lachryma-jobi has a thin and waxy shell and is edible. The performance of the two is similar, and the latter is better. Roots are also used medicinally.
The two are mainly different in composition and efficacy. Coix seed contains sugar, fatty oil and amino acids (leucine, lysine, arginine, tyrosine, etc. Coix seed contains coix seed, coix seed ester and triterpenes. The seed kernel contains coix seed ester, carbohydrate, fat, protein, steroid, amino acid and cis-octadecenoic acid.