Hello, this is generally not harmful to the body. At this age, you can take it orally for a long time and blacken your hair.

Analysis of illness: Hello, Polygonum multiflorum Thunb is divided into raw Polygonum multiflorum Thunb and prepared Polygonum multiflorum Thunb: raw Polygonum multiflorum Thunb can detoxify (stop malaria), moisten intestines to relieve constipation and eliminate carbuncle; Radix Polygoni Multiflori Preparata has the functions of nourishing essence and blood, blackening hair, strengthening bones and muscles, and nourishing liver and kidney. However, Polygonum multiflorum Thunb is toxic and should not be eaten at will. Suggestions: Therefore, taking Polygonum multiflorum Thunb should be taken under the doctor's advice.