Excuse me, is astragalus a kind of wood? Why can't I bite? Can't I eat it in my stomach?

Astragalus membranaceus is not wood, but the root of perennial legumes. Some roots of astragalus will be hard when they are dry, similar to wood. Generally, even if it is dry, it will not bite hard. There may be something wrong with the astragalus you bought. Astragalus membranaceus has a beany smell and sweetness when chewed. The stronger the bean smell, the better. If there is no smell, it may be some kind of wood.