Rehmannia Chinensis Root Extract Bon Antioxydant Anti-âge Rehmannia Chinensis Root Extract at a glance Limited research indicates anti-aging benefits May help diminish the appearance of dark spots Also known as Chinese foxglove, dihuang, or gan dihuang Rehmannia Chinensis Root Extract description _Rehmannia chinensis_ root extract is the extract from the roots of a plant also known as Chinese foxglove. It has long been used in traditional Chinese medicine, where it is known as dihuang or gan dihuang. Limited research shows _Rehmannia chinensis_ root extract is a source of vitamins C and D and exhibits anti-aging properties when applied topically. Some studies indicate that it can also help diminish the appearance of dark spots and uneven tone. While more research is needed, it’s certainly an ingredient to watch when it comes to plant extracts’ impact on skin health and appearance. At the time of this writing, usage level information for _Rehmannia chinensis_ root extract was not available.