The medicinal part of the herb is the seed kernel with the seed coat removed is

The medicinal part of most seed herbs is the intact mature seed, including the seed coat and the seed kernel; the seed kernel, in turn, includes the endosperm and embryo. There are also a few that use a part of the seed, such as mung bean coat for the seed coat, nutmeg coat and longan flesh for the false seed coat, nutmeg for the seed kernel with the seed coat removed, and lotus seed heart for the young leaves and embryonic roots. Very few are processed products of mature seeds, such as soybean yellow rolls for germinated seeds (processed products after germination and drying), tempeh for fermented processed products.