“Fear engages a cortisol/hormonal/fight-or-flight-get-out-of-Dodge response that shuts down all but the essential functions.”

American entrepreneur, venture capitalist, writer and author

Bryan Johnson is an American entrepreneur, venture capitalist, writer and author. He is the founder and former CEO of Kernel, a company that develops devices to monitor and record brain activity, and of OS Fund, a venture capital firm focused on early-stage science and technology companies. His work sits at the intersection of business, science, and technology. Through Kernel and OS Fund, he has been associated with efforts to build tools for understanding the brain and to back new companies in scientific fields. He is also known as a writer and author.