Pau d'arco bark extract comes from the inner bark of the *Tabebuia* tree, a plant with a long history of use in South American herbal traditions. The bark contains naphthoquinones like lapachol, which support immune health and help the body resist fungal organisms. Unlike whole-bark powders, this extract is concentrated and standardized to specific compounds. That means effective doses stay small and the chance of stomach upset can be lower than with larger amounts of raw bark.
People who use extract often want a reliable way to support daily immune function or assist normal digestion. Standardized concentration makes dosing simple and results more consistent from batch to batch.
Take pau d'arco bark extract with food to avoid stomach irritation. It comes in liquid drops, capsules, or tablets. Be aware that it can thin the blood, so use caution if you take anticoagulant medication. Very high doses may strain the liver. Avoid the extract entirely during pregnancy or while breastfeeding.