Melatonin, Circadian Rhythm & Sleep: How Food Sets Your Body Clock with Dr. Deanna Minich

What if improving your blood sugar, hormones, and sleep wasn't just about WHAT you eat, but WHEN you eat? Your body's internal clock plays a powerful role in how you metabolize food, regulate hormones, manage inflammation, and recover overnight. And during perimenopause and menopause, that timing may matter more than ever.
In this episode of The BeingBrigid Show, Brigid sits down with internationally recognized scientist, PhD nutritionist, and functional medicine expert Dr. Deanna Minich to explore the fascinating science of chrononutrition, circadian rhythm, and melatonin.
Recorded live at the Institute for Functional Medicine's annual conference, this conversation reveals why eating late at night may disrupt blood sugar regulation, how artificial light can interfere with your body's natural hormone rhythms, and why melatonin is so much more than a sleep hormone.
They also discuss how phytonutrient-rich foods, morning sunlight, stress management, and intentional meal timing can support women's health, metabolic function, and healthy aging without adding more rigid rules to your life.
What You’ll Learn In This Episode:
Chrononutrition explained: Why when you eat can be just as important as what you eat for blood sugar and metabolic health.
The melatonin-insulin connection: How late-night eating may interfere with your body's natural circadian rhythm.
Perimenopause and menopause: Why hormonal changes can make your internal clock more sensitive to disruptions.
Melatonin beyond sleep: Its potential roles in antioxidant protection, cellular repair, gut health, and healthy aging.
The importance of light exposure: How morning sunlight, artificial lighting, and nighttime blue light influence hormone health.
Foods that support circadian health: The emerging science behind polyphenols, phytonutrients, and your body's biological clock.
Melatonin supplements and red light therapy: What to consider about dosage, quality, timing, and individual needs.
Simple daily habits: How to align your meals, movement, and evening routine with your body's natural rhythms.
Timestamps:
00:00 Meet Brigid and Dr. Deanna Minich
01:24 Minich’s personal path into women’s health
05:24 From nutrition rules to nourishment without perfection
09:10 Chrononutrition: the importance of when you eat
11:14 Darkness deficiency and circadian rhythm
13:03 Late meals, insulin, and melatonin timing
19:09 Why circadian disruption can matter more in midlife
24:25 Phytonutrients and the emerging chronobiotic-food idea
29:02 A day aligned with the body’s clock
33:05 Melatonin, brain repair, and the gut microbiome
37:13 Measuring light and changing evening lighting
41:27 Practical ways to support nighttime melatonin
45:03 Melatonin supplements, quality, and dose
51:05 Red-light therapy: potential benefits and cautions
54:20 Where to find Dr. Minich’s work
Resources & Links:
+ Watch the full episode on YouTube
+ Dr. Minich’s Website
+ Dr. Minich’s Instagram
+ Join The Being Collective
+ Brigid’s Website
+ Brigid’s Instagram