Intermittent fasting (IF) research was conducted almost exclusively on men. In women, extended fasting periods raise cortisol, suppress kisspeptin (the ...

POTS (Postural Orthostatic Tachycardia Syndrome) and anxiety produce nearly identical symptoms: racing heart, dizziness, shortness of breath, chest tightness, and ...

Mast cell activation syndrome (MCAS) symptoms flare in the luteal phase (days 15 to 28) because estrogen is a direct ...

Vagal tone refers to the activity of the vagus nerve, which regulates heart rate, digestion, immune response, and your capacity ...

Waking at 3am every night is not a sleep disorder. It is a cortisol signaling problem. Between 2 and 4am, ...