Balanced adrenal glands are a key part of being Bulletproof. Your adrenals create and regulate cortisol, which makes them essential for hacking stress. When your adrenals work the way they should, you become more resilient, and you have a much easier time taking on life’s challenges.
But if you’re overwhelmed by chronic stress, your adrenals can get burnt out from constantly producing cortisol. The result is adrenal fatigue. Your natural cortisol rhythm becomes irregular — sometimes you produce too much cortisol, sometimes not enough — and you can struggle to make other hormones, like androstenedione (the precursor to testosterone).