Isatis comes from the root and leaf of Isatis tinctoria or Isatis indigotica, a plant also called Ban Lan Gen or woad. It has deep roots in traditional Chinese medicine.
People reach for isatis during seasonal changes or when feeling run down to support immune function.
You can find it as a dried extract in capsules, tinctures, or teas. Because concentration varies, stick to the product label or check with a health professional for dosing.
Cautions: Lab studies point to a possible interaction with blood thinners, so talk to your doctor if you take anticoagulant or antiplatelet drugs. Stop use before surgery. Skip it entirely if you are pregnant or breastfeeding since safety data is lacking.