6 Types of Foods That Negatively Affect Your Thyroid — What to Limit or Avoid

It also:

  • Spikes insulin, which can disrupt hormone balance
  • Weakens the immune system
  • Contributes to weight gain — a common struggle with hypothyroidism

🟢 Smart tip:
Choose whole, low-glycemic foods like berries, nuts, and vegetables.
Reduce added sugars to under 25g per day.

❌ 5. Excess Caffeine

The Adrenal & Thyroid Stressor

Foods to watch:

  • Coffee, energy drinks, strong black tea

While moderate caffeine is fine for most, excess intake can:

  • Worsen anxiety and insomnia — common in hyperthyroidism
  • Disrupt sleep and adrenal health — which affects thyroid function
  • Interfere with thyroid medication absorption (wait at least 60 minutes after taking meds)

🟢 Smart tip:
Limit to 1–2 cups of coffee per day, and avoid drinking it with breakfast if you take thyroid meds

❌ 6. Processed Vegetable Oils & Trans Fats

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