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I'm Melissa Kirsch, editor-in-chief of Lifehacker. And I'm Andy Orne, editor with Lifehacker.com, where we help you improve your life one week at a time. I'm Melissa Kirsch, editor

and chief of Lifehacker. And I'm Andy Oren, editor with Lifehacker. And today we're talking to the

biohacking Bulletproof exec himself, Dave Asprey. Dave is probably best known as the guy who

wants you to put butter in your coffee. He's a Silicon Valley tech entrepreneur and investor who,

according to his official bio, has spent two decades and hundreds of thousands of dollars to

hack his own biology. He describes how he did it in his New York Times best-selling book,

The Bulletproof Diet. His new book, Headstrong, The Bulletproof Plan to activate untapped

brain energy to work smarter and think faster in just two weeks, came out loud. His new book, Headstrong, The Bulletproof Plan to Activate Untapped Brain Energy to Work

Smarter and Think Faster in just two weeks came out last week.

Hi, Dave.

I'm so happy to be here.

...