One study showed people taking 3 grams daily for 21 days experienced no negative effects
A naturally occurring drug identified as camptothecin (CPT) is found in the bark and stem of the Camptotheca acuminata tree species, which is mostly grown in China and Tibet
EMBO J 30:204456
J Agric Food Chem 55:903911 Floegel A, Kim DO, Chung SJ, Koo SI, Chun OK (2011) Comparison of ABTS/DPPH assays to measure antioxidant capacity in popular antioxidant-rich US foods
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Sources of Oxidative Stress A homeostatic balance exists between the production and quenching of ROS produced during normal physiological processes (Figure 1)