Juggling that stress and grind, I let my health slip and gained 40 lbs. Within a few years I'd fallen into a deep, chronic depression.
Somewhere in that timeline, my body began developing an autoimmune process affecting my thyroid and then my stomach lining."
He recounted that his immunological markers originated early in life.
"My body's genetic and immunological architecture made a mistake decades ago, failing to distinguish between my own tissues and external threats," Johnson wrote.
"Trying to cure a decades old, genetically driven, antigen specific immune failure by switching to a meat diet or getting sunlight is like trying to fix a corrupted line of software code by altering the temperature of the room."
Johnson addressed frequent unsolicited social advice regarding his intense commitment to longevity.
"I don't intend to live a little.
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I intend to live more than any human who has yet lived and invite you to join me," Johnson wrote.
