James Lee

“exercise triggers a whole host of beneficial processes for your brain.  One of the most important is the release of brain-derived neurotrophic factor (BDNF), which acts as a kind of “fertiliser” for the brain, triggering repair and neuronal growth.”
― James Lee, Better Living Through Neurochemistry - A guide to the optimization of serotonin, dopamine and the neurotransmitters that color your world

“Also, isolation leads to chronically lowered levels of the feel-good neurotransmitter serotonin.  It is one of the bizarre ironies of major depression that being depressed causes people to withdraw from the most powerful antidepressant known - rich and varied social contact.  However therein lies a rich lesson also - in some cases one of the quickest and most effective ways to reverse depression is to socialize.”
― James Lee, The Methuselah Project - How the science of anti-aging can help you live happier, longer and stronger: Harness the latest advances in bioscience to create your own anti-aging blueprint