How Functional Medicine Supports Thyroid Health & Metabolism
Crafted by: Jonathan Chew

Introduction: The Thyroidโs Role in Energy & Metabolism
Your thyroid gland controls metabolism, energy levels, and body temperature. When itโs not functioning properly, symptoms like fatigue, weight gain, hair loss, and brain fog can appear.
๐ Did You Know?
โ 1 in 8 women will develop a thyroid disorder in their lifetime.
โ Hypothyroidism (underactive thyroid) slows metabolism, leading to weight gain.
โ Functional Medicine identifies the root causes of thyroid dysfunction instead of just prescribing synthetic hormones.
๐ก In this guide, weโll explore:
โ How Functional Medicine supports thyroid health naturally
โ The best diet & supplements for thyroid function
โ How gut health, stress, and toxins impact the thyroid
Understanding Thyroid Disorders: Hypothyroidism vs. Hashimotoโs
๐ Common Thyroid Conditions:
โ Hypothyroidism (Underactive Thyroid): Slows metabolism, causes fatigue, weight gain, dry skin.
โ Hashimotoโs Thyroiditis: Autoimmune condition where the immune system attacks the thyroid.
โ Hyperthyroidism (Overactive Thyroid): Leads to weight loss, anxiety, rapid heartbeat.
๐ Example: A person with Hashimotoโs might have gut issues and nutrient deficiencies, worsening thyroid symptoms.
Functional Medicineโs Root-Cause Approach to Thyroid Health
Instead of just prescribing thyroid medication, Functional Medicine investigates why the thyroid is imbalanced.
๐ Common Root Causes of Thyroid Dysfunction:
โ Nutrient Deficiencies โ Low iodine, selenium, zinc, or vitamin D3 slows thyroid function.
โ Gut Dysbiosis & Leaky Gut โ Poor gut health disrupts thyroid hormone conversion.
โ Chronic Stress & Adrenal Dysfunction โ High cortisol suppresses thyroid hormones.
โ Heavy Metal & Toxin Exposure โ Fluoride, mercury, and pesticides interfere with thyroid function.
๐ Example: A woman with hypothyroidism & weight gain might actually have gut inflammation blocking thyroid hormone absorption.
The Best Thyroid-Supporting Nutrients & Foods

Thyroid hormones require specific nutrients to function properly.
๐ Top Functional Medicine Nutrients for Thyroid Health:
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Iodine โ Essential for making thyroid hormones (seaweed, fish, eggs).
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Selenium โ Protects the thyroid from oxidative stress (Brazil nuts, sunflower seeds).
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Zinc โ Helps convert thyroid hormones to their active form (pumpkin seeds, oysters).
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Magnesium โ Supports energy production & metabolism (leafy greens, almonds).
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Vitamin D3 โ Regulates immune function & thyroid hormone balance (sunlight, fatty fish & mushrooms).
๐ Example: A person with low thyroid hormones & fatigue may need selenium-rich foods & vitamin D supplementation.
Healing the Gut to Improve Thyroid Function
โ 70% of thyroid hormone conversion happens in the gut.
โ A leaky gut can trigger Hashimotoโs & autoimmune thyroid issues.
โ Improving gut health reduces inflammation & enhances thyroid function.
๐ Functional Medicine Gut-Healing Plan for Thyroid Health:
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Add Probiotics & Prebiotics โ Fermented foods, fiber, resistant starch.
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Reduce Gluten & Dairy โ These can trigger inflammation in some thyroid patients.
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Repair the Gut Lining โ Bone broth, collagen, L-glutamine, and zinc.
๐ Example: A person with Hashimotoโs and bloating may benefit from removing gluten & taking gut-healing nutrients.
How Stress & Cortisol Imbalance Affect Thyroid Function
โ Chronic stress raises cortisol, which suppresses thyroid hormone production.
โ High cortisol also increases reverse T3 (rT3), which slows metabolism.
โ Functional Medicine supports adrenal-thyroid balance to restore energy.
๐ Stress Management for Thyroid Health:
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Reduce caffeine & alcohol โ Both stress the adrenal glands.
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Get 7-9 hours of quality sleep โ Poor sleep disrupts thyroid function.
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Use Adaptogens โ Ginsenoside & Rhodiola help lower cortisol naturally.
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Daily mindfulness & breathwork โ Lowers stress hormones & supports metabolism.
๐ Example: A woman with unexplained weight gain & anxiety might have high cortisol blocking thyroid function.
Detoxing Heavy Metals & Environmental Toxins
โ Fluoride, chlorine, mercury, and BPA (plastics) interfere with thyroid function.
โ Functional Medicine supports natural detox pathways to remove thyroid-disrupting toxins.
๐ Best Detox Strategies for Thyroid Health:
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Drink Filtered Water โ Avoid fluoride & chlorine in tap water.
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Support Liver Detox โ Cruciferous veggies (broccoli, kale), dandelion tea.
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Increase Sweating & Sauna Therapy โ Helps eliminate toxins naturally.
๐ Example: A patient with Hashimotoโs & fatigue may benefit from a gentle detox program to reduce heavy metal exposure.
Functional Medicine Thyroid Optimization Plan
๐ Step 1: Get Comprehensive Thyroid Testing โ TSH, Free T3, Free T4, Reverse T3, and thyroid antibodies.
๐ Step 2: Optimize Thyroid Nutrients โ Iodine, selenium, zinc, magnesium, vitamin D.
๐ Step 3: Heal the Gut & Reduce Inflammation โ Remove gluten, balance gut bacteria.
๐ Step 4: Manage Stress & Support Adrenals โ Adaptogens, mindfulness, quality sleep.
๐ Step 5: Detox Environmental Toxins โ Filtered water, sauna therapy, liver support.
๐ Want a personalized Functional Medicine plan for thyroid health?
๐ Schedule a consultation today to restore energy & metabolism naturally!