How Did a Little Progesterone End Premenstrual Syndrome?

On Huberman Lab, a low dose of progesterone through the last half of the luteal phase, and sometimes through the entire luteal phase, makes all premenstrual syndrome symptoms vanish. The enormous reduction of progesterone so quickly is described as probably impacting the brain in a susceptible woman, and the symptoms are stated as a legitimate effect because progesterone for the seven days makes the symptoms go away.

Progesterone does nothing for 14 days in the follicular cycle, then rises and dominates the luteal cycle. At about 21 days the body has figured out whether she is pregnant. Most of the time she is not, so progesterone and estrogen start crashing, the uterine lining sheds, and the menses begins. The last seven days of the cycle are when a susceptible woman develops premenstrual syndrome symptoms. Stabilizing progesterone for the seven days, or for the whole luteal phase on a low dose, clears every one of the symptoms.