A Functional Approach to Hypothyroidism: Root Causes, Natural Therapies, and Hormone Harmony

May 29, 2025 | Longevity

Hypothyroidism

What Is Hypothyroidism Functionally?

Hypothyroidism occurs when your thyroid gland slows down hormone production. But instead of only asking “how low are your thyroid hormones,” a functional approach asks: why is your thyroid underperforming? Often, it’s a whole-body issue involving inflammation, nutritional deficiencies, stress, and hormone imbalance.

Key Root Causes to Explore:

  • PChronic inflammation (often driven by diet, stress, or toxins)
  • PAutoimmunity (Hashimoto’s) often triggered by gut imbalances or food sensitivities
  • PIodine, selenium, zinc, and iron deficiencies
  • PHigh cortisol or adrenal fatigue
  • PEstrogen dominance in women
  • PLow vitamin D

Common HypothyroidismSymptoms (in both overt and subclinical hypothyroidism): 

  • PFatigue, brain fog, and low mood
  • PConstipation and slow digestion
  • PDry skin and hair thinning
  • PWeight gain or resistance to weight loss
  • PMenstrual irregularities and low libido

A Functional Approach to Diagnosis:

In addition to TSH and T4, ask your provider for:

  • PFree T3 and Reverse T3
  • PThyroid antibodies (TPO, TGAb)
  • PFerritin, B12, Vitamin D, magnesium, zinc
  • PSalivary cortisol (adrenal function)

Natural Support Strategies:

Reduce Inflammation 

  • Eliminate processed foods and sugar 
  • Focus on whole foods, omega-3s, herbs like turmeric 

Balance Blood Sugar

  • Eat protein and fiber with every meal 
  • Avoid refined carbs 

Rebuild Nutrient Stores 

  • Selenium, zinc, iodine (carefully), iron (if low) 
  • Vitamin D3 + K2

Support Adrenals and Lower Stress

  • Adaptogens like ashwagandha, holy basil 
  • Mindfulness, better sleep, nature time 

Gut and Liver Support

  • Consider probiotics, prebiotics, liver-friendly foods (cruciferous veg)Â