Hypothyroidism: 8 foods you should avoid at all costs!

1. Soy and soy-based products

• Why avoid it? Soya contains compounds called isoflavones, which can interfere with the production of thyroid hormones and the absorption of the drug levothyroxine, commonly used to treat hypothyroidism.
• How to consume safely: If you do consume soy, wait at least 4 hours after taking the medication to minimize the impact.

2. Cruciferous vegetables (in excess)

• Examples: Broccoli, cauliflower, Brussels sprouts, cabbage.
• Why avoid them? These vegetables contain substances called goitrogens, which can inhibit iodine uptake by the thyroid, impairing hormone production.
• How to consume safely: Cooking these vegetables reduces their goitrogen content. Consume them in moderate quantities.

3. Gluten (for those with sensitivities)

• Why avoid it? Individuals with hypothyroidism, especially those with Hashimoto's thyroiditis (an autoimmune disease), may be more likely to develop gluten sensitivity or celiac disease. Gluten can trigger inflammation and worsen symptoms.
• How to consume it safely: If there is no diagnosed sensitivity, gluten can be consumed in moderate quantities.

4. Ultra-processed and sugar-rich foods

• Why avoid them? These foods can lead to blood sugar spikes and weight gain, which are common problems in people with hypothyroidism. In addition, excess sugar can increase inflammation in the body.
• How to consume safely: Prefer natural foods and avoid soft drinks, industrialized cookies and sweets.

6. Caffeine (in excess)

• Why avoid? High doses of caffeine can interfere with the absorption of thyroid medication if consumed at times close to the medication. It can also aggravate symptoms such as anxiety and insomnia, which some people with hypothyroidism experience.
• How to consume it safely: Wait at least 30 minutes after taking the medication before drinking caffeinated coffee or tea.

7. Hydrogenated oils and trans fats

• Why should we avoid them? Trans fats found in fried foods, margarine and industrialized products can increase inflammation and negatively affect hormonal function.
• How to consume safely: Replace with healthy fats such as olive oil, coconut oil and avocado.

8. Non-iodized salt

• Why avoid it? Iodine is an essential mineral for the production of thyroid hormones. Consuming non-iodized salt can contribute to iodine deficiency, especially in populations with a low natural intake of this mineral.
• How to consume it safely: Prefer iodized salt, but avoid overdoing it, as excess iodine can also harm the thyroid.

General tips for a thyroid-friendly diet

• Prioritize nutrient-rich foods: Include sources of selenium (Brazil nuts, eggs) and zinc (lean meats, seeds) to support thyroid health.
• Keep track of iodine levels: Although iodine is crucial, too much can be harmful. Consult a health professional to assess the need for supplementation.
• Wait after the medication: Take thyroid medication on an empty stomach and wait at least 30 minutes before consuming food or drink.

Maintaining a balanced diet and avoiding foods that interfere with thyroid function is essential for improving the quality of life of those living with hypothyroidism. If you have any doubts, contact a nutritionist or endocrinologist for personalized advice.

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