A study showed that onion juice is an effective natural cure for alopecia, according to About Health. Hair regrowth was seen in people that applied onion juice twice a day for two weeks, and about 74 percent of them had regrowth after four weeks.
Another study used a mixture of thyme, rosemary, cedarwood and lavender essential oils in jojoba and grapeseed oil to treat alopecia, states About Health. The results showed 44 percent of the people had improved hair growth after seven months of daily use.
Before using any natural cure for alopecia, it is important to know the cause of the hair loss, mentions WebMD. There may be a medical condition that needs immediate treatment, which when addressed will resolve the hair loss issue as well.