Soybeans also serve as powerful antioxidants and prevent the accumulation of free radicals in the scalp that can destroy hair follicles. The high concentration of iron provided by soybeans aid in the formation of hemoglobin, thus leading to an improvement in blood circulation to the hair follicles that prevents hair from falling from its roots . Hence, soybean based foods like soy milk, soy beverages, soy cheese, tofu, etc., serve as natural boosters of hair growth for promoting the re-growth of hair in individuals suffering from alopecia areata.
Mechanism of action: Topical immunotherapy acts by varied mechanisms of action. The most important mechanism is a decrease in CD4 to CD8 lymphocyte ratio which changes from 4:1 to 1:1 after contact immunotherapy. A decrease in the intra-bulbar CD6 lymphocytes and Langerhan cells is also noted. Happle et al, proposed the concept of ‘antigenic competition’, where an allergic reaction generates suppressor T cells that non-specifically inhibit the autoimmune reaction against a hair follicle constituent. Expression of class I and III MHC molecules, which are normally increased in areas affected by alopecia areata disappear after topical immunotherapy treatment 34 .A ‘cytokine inhibitor’ theory has also been postulated 34 .