Are smart drugs driving Silicon Valley?

The idea: mix and match enough of them to find the killer combo; the winning blend is what’s known as a “stack.” Asprey’s stack is ever evolving as he experiments with different ingredients.

After selling his first company for millions, Asprey realized that he was unhealthy and decided to focus on losing weight and maximizing his brainpower.

“When I weighed 300 pounds, I was having really bad problems with brain fog,” he said. “As an entrepreneur, that’s a problem. I fixed that.”

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