Understanding Why Histamine Dysregulation is Not the Primary Driver of PMS/ PMDD

As a neurologist, I’ve always been driven by an evidence-based approach to medicine, but as a woman, I’m deeply attuned to the realities of cyclical health. Lately, both in my clinical practice and within our Two Moons community, I’ve noticed a wave of confusion. With wellness content exploding around Mast Cell Activation Syndrome (MCAS) and histamine 'buckets,' many are left wondering if histamine is the hidden culprit behind their severe PMS. Let’s look at what the research actually says about how our reproductive hormones interact with histamine biology.