Can I Boost My Thyroid With Diet?
1. Avoid all polyunsaturated fats — meaning liquid oils, nuts, and seeds — as these strongly inhibit your thyroid function on many different levels.
2. Use coconut oil and butter as your sources of fat. Saturated fats and especially coconut oil support your thyroid function.
3. Get lots of protein from milk products, eggs, shellfish, and meat. Good quality protein is important for a healthy liver, and the liver is important for the activation of the inactive thyroid hormone T4 to the active hormone T3.
4. Get good sugars from ripe fruits and fruit juices — orange juice is a great choice. You can increase your thyroid function by about 25% by supplying your body with good sugars.
5. Combine your meals to include both protein, fats, and carbohydrates. When your body gets a full meal, the stress hormones are lowered and your metabolism is strengthened.
6. Keep your blood sugar steady by having milk and fruit between meals. A steady blood sugar keeps your metabolism up.
7. Avoid indigestible fibers including seeds, grains, and raw vegetables in general. These fibers can feed bacteria in the intestine and produce toxins.
8. Eat one to two raw carrots per day to clean your intestine. Carrots are an exception to the advice in number 7 and should be used raw, due to the antimicrobial properties of the raw carrot fibers.
9. Use lots of coffee with milk and sugar throughout the day (unless intolerable). Coffee stimulates metabolism and contains magnesium and B-vitamins.
10. Get sunlight every day. If there is no sunlight, use light therapy lamps to support your thyroid and hormonal balance.
All of these dietary changes are explained in depth in my book How to Boost Metabolism with Food and my Metabolic Nutrition Mastery course, along with practical meal guidance and food lists.
Frequently Asked Questions
Why should I avoid polyunsaturated fats for thyroid health?
Polyunsaturated fats — found in liquid vegetable oils, nuts, and seeds — inhibit thyroid function at multiple levels. They block the release of thyroid hormones from the gland, interfere with their transport in the blood, and impair how cells respond to thyroid hormone. Replacing these with saturated fats such as butter and coconut oil removes that suppression and actively supports thyroid activity. I cover this in detail in my book How to Boost Metabolism with Food.
Can eating more sugar really increase thyroid function by 25%?
Yes — supplying the body with good sugars from ripe fruit and fruit juices can increase thyroid function by around 25%. When blood sugar drops, the body raises stress hormones to compensate, and stress hormones suppress thyroid function. Keeping blood sugar stable with fruit, fruit juice, and milk between meals directly lowers this stress response and supports metabolic rate. Orange juice is one of the best options.
Why are raw carrots recommended while other raw vegetables are not?
Most raw vegetables contain indigestible fibers that feed bacteria in the intestine and can increase endotoxin production — which suppresses thyroid function. Raw carrots are an exception because their fibers have antimicrobial properties that actually help clean the intestine and reduce bacterial overgrowth. One to two raw carrots per day is one of the simplest practical steps you can take to support gut health and, through it, your thyroid.
How does coffee support thyroid function?
Coffee stimulates metabolism directly and also provides magnesium and B-vitamins, both of which are important for energy production and thyroid function. Coffee with milk and sugar combines this metabolic stimulation with protein and quick fuel for the cells — making it a genuinely supportive drink in the pro-metabolic approach, unless you find it does not agree with you personally.
Why does combining protein, fat, and carbohydrates in a meal matter?
When the body receives a complete meal with all three macronutrients, stress hormones are lowered and metabolism is strengthened. Meals that are too low in carbohydrates raise cortisol and adrenaline to compensate for low blood sugar — and these stress hormones directly suppress thyroid function. A balanced meal sends the signal that fuel is abundant, which allows the thyroid to function properly. You can find detailed meal guidance in my Metabolic Nutrition Mastery course.
