Dong quai (Angelica sinensis) is a fragrant plant in the same family as celery and carrots, native to the cool, damp mountains of China, Korea and Japan. The root is harvested, dried and sliced, and it has been part of traditional Chinese practice for well over a thousand years, where it is so closely linked with women's wellbeing that it is often called female ginseng.
In Chinese practice dong quai is rarely used alone. It is usually combined with other herbs in classic formulas, and the root also turns up in soups and tonics. In supplements you will see it listed as dong quai root, Angelica sinensis root powder or root extract, typically in capsules or in blends for women's health alongside herbs such as chaste tree, black cohosh or red clover.
Dong quai is traditionally used to support women's monthly cycle and the menopause. Very little research has been done on it in people, and the studies that exist have not allowed researchers to draw conclusions, so its reputation rests mainly on long tradition rather than modern trials.