This revised edition contains over one thousand entries, covering everything from common everyday foods to the latest in genetic research – and beyond. Each entry’s properties are objectively evaluated based on the latest scientific evidence. Included are substances that not only claim to improve thinking and other brain functions, but those that presumably help prevent brain damage and degeneration, prevent aging and extend the human lifespan, enhance social skills and moral behavior, induce altered states of consciousness, and improve mood, stamina, and energy.
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