Ginseng. Ginseng is able to promote the development of new dermal cells on the scalp. This increases the strength of hair roots and follicles. This encourages new strands to grow and prevents thinning and breakage of the hair. One study demonstrated the ability of ginseng to support the regrowth of hair for individuals suffering from alopecia areata. This disease causes patches of hair loss due to an attack on hair follicles by the immune system. In the study, 131 people suffering from alopecia areata were split into two groups. One group was given a ginseng corticosteroid mix. The control group was only given corticosteroids. After the twelve-week study was complete, it was determined the group given ginseng recovered more hair loss than the control group.