A primary herb in traditional Chinese medicine, Rehmannia inhibits allergic responses and modulates immune functions. It is thought to be valuable for reducing autoimmune responses (lupus, rheumatoid arthritis, psoriatic arthritis, Sjogren’s, and eczema). Considered an adrenal tonic, it supports adrenal function and relieves stress (adaptogenic). Rehmannia also demonstrates potent anti-inflammatory properties.

Side effects: Generally well tolerated. In higher doses, causes loose stools in some people. Avoid in pregnancy.