Natural cure for Alopecia Areata
There is a lot of buzz surrounding Korean red ginseng and hair growth, but does it work?  The family of ginseng roots have been used for 1000’s of years and the benefits are so popular, Korean red ginseng has been coined the “king of herbs.”
Six year red ginseng has 40x the the healthy content of its siblings and has the capability of boosting your immune system, increase energy levels, blood flow and memory functions.
There are 3 main types of ginseng; Oriental, Siberian and American.
American ginseng is probably the least popular and least used of the three types available, due to the American population never being huge users of the herb.
Oriental ginseng or panax has been used for thousands of years, contains the favored ginsenoside properties and has some proven efficacy for hair regrowth.
Lastly, Siberian ginseng is not the same herb as American and Panax ginseng, so buyer beware.  The Russians wanted to offer a supplement  to provide to athletes, but most studies have only been done in Russia.

Studies correlating hair regrowth with ginseng:
Recent studies have been done to evaluate the efficacy of ginseng in the treatment of alopecia areata.  But does the research show that it really works?
Ginseng may promote hair grow because its believed to increase the number of dermal papilla cells in the scalp and preventing natural cell death.  It may also stimulate the scalp with improved blood flow to the area.Ginseng is even found in hair products such as shampoo and conditioners, but the efficacy has not been evaluated.
Clinical Study
Sang-Wook Son professor at Korea University College of Medicine had a study that included 131 subjects with Alopecia Areata.  One group was given the typical corticosteroid as a treatment and the second group was given corticosteroids and ginseng.  The studies proved to be more promising for those in the ginseng group, although not statistically significant.
But like its topical counterpart minoxidil, both minoxidil and Korean red ginseng are known to reduce blood pressure, so it is assumed that their efficacy is about the same. Korean red ginseng has a huge appeal for its drug free components.  Another player in the market is Vivisical an amino acid used to promote hair growth and density.  This product is noted to effectively promote hair growth.