LSD — casually known as acid — is a powerful hallucinogenic drug made from lysergic acid, a fungus that grows on grains like rye. You might also hear it referred to as “dots” or “lucy.” An LSD high is ...

Low doses of the psychedelic drug LSD increase complexity in the brain, even when they don’t alter a person’s consciousness. The finding challenges the idea that these two phenomena are correlated and ...