Toxicological Trivia from January 4,  2010: Extracts from the leaves of the tree of the image is said to have antioxidant and anti-inflammatory effects. The dietary supplement promoted as a stimulus for memory, does not help prevent dementia and Alzheimer’s disease, according the largest study conducted prolonged in the elderly. This leaves are from:
a) Ginkgo biloba;
b) St John’s Wort (St. John’s Wort)
c) Echinacea.

Correct Answer a. Find more information on recent news: Study on Ginkgo and dementia