REV0lution Health Library

Evidence-informed articles on nutrition, metabolism, hormones, digestive health, fitness, recovery, lab testing, and functional medicine.

Gut Health
IBS, bloating, GERD, constipation, gut health
Hormones
PCOS, perimenopause, menopause, cortisol
Thyroid Health
Hashimoto's, hypothyroidism, thyroid labs
Metabolic Health
Insulin resistance, blood sugar, weight loss resistance
Autoimmune Disease
Autoimmunity, inflammation, immune regulation, root-cause support

Advanced Lab Analysis
Functional testing, blood chemistry, GI-MAP, DUTCH, OAT, and lab interpretation
Fitness & Recovery
Strength, movement, sleep, recovery, performance, and resilience
Functional Medicine
Root-cause care, systems thinking, symptom patterns, and whole-person health
Nutrition & Performance
Protein, fueling, body composition, exercise nutrition, and metabolic health

Understand your health. Backed by science.

Is It Perimenopause—or Something Else? Thyroid, Iron, Insulin and Other Overlapping Symptoms

Kerri Rachelle

Published on: 21/07/2026

Is it perimenopause or something else? Learn how thyroid dysfunction, iron deficiency, insulin resistance, under-fueling, and sleep disorders can overlap.

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What Is Perimenopause? Symptoms, Hormone Changes, and How Long It Lasts

Kerri Rachelle

Published on: 21/07/2026

What is perimenopause? Learn the early signs, hormone changes, period patterns, typical starting age, testing limitations and how long the transition lasts.

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