Lifestyle interventions: Improving Thyroid Function
The thyroid is a gland in the front of the neck that produces the hormones that help regulate metabolism, growth and development. Thyroid hormones affect nearly every organ system in the body. This system is essential for metabolic balance, body temperature, and heart rate.
Most common disorders
Thyroid disorders are caused either by conditions that affect hormone production (too low or too high) or by physical changes, such as nodules or masses.
- Hypothyroidism (Underactive Thyroid) occurs when the gland doesn’t produce enough hormones. Common symptoms include fatigue, weight gain, feeling cold, dry skin, and constipation. The most common cause is an autoimmune condition called Hashimoto’s thyroiditis.
- Hyperthyroidism (Overactive Thyroid) happens when the gland produces excessive hormones, speeding up the body’s metabolism. Common symptoms include weight loss, rapid heartbeat, anxiety, tremors, and heat intolerance. The primary cause is an autoimmune condition called Graves’ disease.
- Thyroid Nodules are lumps that form within the thyroid gland. The vast majority are benign (non-cancerous) and don’t cause symptoms. Some may need evaluation to check for cancer, especially if they are large.
- Thyroid Cancer is relatively rare but is an important process to detect. It is often highly treatable with a good prognosis.
Lifestyle modifications:
Nutrition
A balanced, primarily plant-based diet provides essential nutrients that support thyroid function. The key is to focus on whole foods while being mindful of a few specific considerations.
Dietary Considerations
Iodine Balance: Both deficiency and excess are risk factors for thyroid issues. Using iodized salt in moderation is recommended, while being cautious with high-dose seaweed supplements.
Sources
- Salt: Iodized salt is the most reliable source. ½ tsp a day over the course of the day will provide sufficient iodine Many people have started using sea salt instead of iodized salt – sea salt does not contain significant amounts of iodine.
- Seaweed – experiment with ways to include this in your diet!
Two sheets of nori, the seaweed used to make sushi. Half-teaspoon of the seaweeds arame or dulse - Supplementation: Most adults need 150 micrograms of iodine a day. If you are limiting salt intake or use sea salt, consider taking an iodine supplement or check to see if your multivitamin contains iodine – most do.
Selenium: Crucial for activating thyroid hormones.
Sources: Brazil nuts (1-2 per day), sunflower seeds, mushrooms, and whole grains like brown rice and oats.
Zinc: Supports thyroid hormone production.
Sources: Legumes (lentils, chickpeas), pumpkin seeds, tofu, and quinoa.
Dietary Fats: Studies suggest that high intake of saturated and monounsaturated fats may be negatively associated with thyroid function. A plant-predominant diet naturally lower in these fats can be beneficial.
Anti-Inflammatory Focus: An anti-inflammatory diet centered on whole, plant-based foods (fruits, vegetables, nuts, seeds, olive oil) can help reduce inflammation, which is particularly important for autoimmune thyroid conditions.
- Whole Grains: Quinoa, brown rice, and oats provide fiber and stable energy.
- Colorful Fruits & Vegetables: Rich in antioxidants that reduce inflammation.
- Healthy Fats: Avocados, nuts, seeds, and olive oil support hormone function.
- Lean Proteins: Tofu, tempeh, and legumes provide amino acids for hormone synthesis.
A couple common nutrition FAQs
Should I remove cruciferous vegetables and soy from my diet? Nope! Keep eating them.
“Goitrogenic foods” (that’s a mouthful!) are foods that contain natural compounds which can slightly affect thyroid function by interfering with iodine uptake or thyroid hormone production. These include cruciferous vegetables like broccoli, cabbage, kale, and also soy and flax.
The key point: for most people, these foods are not a problem. The potential effects mainly concern individuals who already have low or borderline iodine intake. So rather than cutting these healthy foods out, the goal is to ensure you’re getting enough iodine in your diet.
Cooking these foods also greatly reduces their goitrogenic effect—so while you don’t need to avoid raw versions, it’s best to enjoy them cooked most of the time.
In short: cruciferous veggies, soy, and flax are nutrient powerhouses—keep them on your plate!
Should I go gluten-free if I have Hashimoto’s? Not necessarily—but a short trial can be reasonable.
Current evidence does not support a gluten-free diet (GFD) for everyone with Hashimoto’s thyroiditis who does not have celiac disease. Most studies show no significant improvement in thyroid antibody levels or thyroid hormone function with a gluten-free diet in non-celiac Hashimoto’s patients.
Some research has found modest reductions in thyroid antibody titers or TSH in certain individuals after adopting a gluten-free diet—but these results are inconsistent and may be due to other factors, such as general improvements in diet quality or reductions in inflammation, rather than gluten itself.
Overall, anti-inflammatory eating patterns—a diet rich in whole plant foods, which emphasize vegetables, fruits, whole grains, and omega-3-rich foods—show stronger evidence for reducing inflammation and supporting thyroid health than a gluten-free diet alone.That said, going gluten-free for a few months won’t harm most people and may help you determine if you personally notice improvements in your energy, digestion, or thyroid antibody levels. It’s a safe experiment for some, but not a universal recommendation.
Bottom line: Unless you have celiac disease or gluten sensitivity, you don’t need to avoid gluten—but trying a short-term gluten-free diet can be a reasonable way to see how your own body responds.
Stress Management
Chronic stress can disrupt the balance of hormones like cortisol, which negatively impacts thyroid function. This can worsen symptoms of thyroid disorders and contribute to inflammation in autoimmune conditions like Hashimoto’s and Graves’ disease.
Key Techniques for Stress Reduction
- Deep Breathing Exercises: Practice slow, deep breaths, focusing on filling the lungs and exhaling fully. This can quickly activate the body’s relaxation response. For a step-by-step guide to our favorite techniques: Turning Down the Fight-or-Flight Response: How Breathwork Calms Stress
- Progressive Muscle Relaxation: Tense and then release different muscle groups in the body. This helps release physical tension and promotes a state of calm.
- Regular Physical Activity: Engage in activities you enjoy, such as walking, yoga, or dancing. Exercise helps reduce stress and improve mood by releasing endorphins.
- Time Management: Prioritize tasks, set realistic goals, and delegate responsibilities to reduce feelings of overwhelm. Allocating time for rest is crucial.
- Connect with Nature: Spending time outdoors has a calming effect. A walk in a park or time spent gardening can help reduce stress levels.
Incorporating Mindfulness & Meditation
- Structured Learning: Consider attending a local or online mindfulness course or workshop. Learning in a group setting provides expert guidance and supportive structure.
- Professional Guidance: For personalized support, especially when dealing with significant stress, consulting a therapist can be very beneficial. They can help you develop a tailored stress management plan.
- Guided Imagery: Use audio recordings or apps that provide guided imagery sessions, leading you through visualization of peaceful scenes to promote deep relaxation.
- Engage in church/Prayer community: Dedicate a specific, consistent time each day for focused prayer or contemplative practice. This routine can serve as a meditative anchor point in your day, helping to center your thoughts and reduce anxiety.
Physical Activity
Regular exercise is a key supportive measure for thyroid health. It helps regulate metabolism, supports weight management, and can improve overall well-being.
Recommended Types of Exercise
- Aerobic Exercise: Activities like brisk walking, jogging, cycling, and swimming are excellent for improving cardiovascular health and aiding weight management.
- Strength Training: Using resistance bands, free weights, or body weight helps build muscle mass, which can increase metabolism and combat muscle weakness.
- Yoga: This gentle practice combines physical postures with breathwork, promoting relaxation, flexibility, and balance. Certain poses are also believed to support thyroid function. Source: Can Yoga Help to Manage the Symptoms of Thyroid Diseases?
Practical Tips for Exercise
- Focus on Consistency: Regular, consistent activity is more important than occasional intense workouts.
- Incorporate Moderate Intensity: Aim for a pace that raises your heart rate.
- Choose Enjoyable Activities: Engage in exercises you enjoy, such as dancing or cycling, to ensure you stay motivated.
Sleep and rest
Quality sleep is essential for thyroid health, primarily due to its direct impact on the hormonal axis that controls thyroid function.
The Importance of Sleep for Thyroid Function
- Sleep helps Regulate TSH Secretion: TSH is secreted during the night, peaking around 2:00-3:00 AM. Adequate, high-quality sleep during these hours is crucial for properly inhibiting and regulating TSH levels. Source: The relationship between thyroid function tests and sleep quality: cross-sectional study
- Maintains Circadian Rhythm: The thyroid axis is controlled by the body’s internal clock. Disruptions from irregular sleep schedules or staying up late can interfere with the natural secretion cycle of thyroid-related hormones.
- Prevents Dysfunction: Both shorter and longer than optimal sleep durations have been associated with subclinical thyroid dysfunction, highlighting the need for a consistent sleep schedule.
Practical Tips for Improving Sleep
- Prioritize Consistency: Go to bed and wake up at similar times, even on weekends. Studies suggest that “staying up late on weekends” can be a factor that disrupts thyroid secretory function.
- Aim for 7-8 Hours: Target the optimal sleep duration of 7 to 8 hours per night. Both insufficient and prolonged sleep can be detrimental.
- Focus on Nighttime Sleep: Compensatory daytime sleep does not effectively suppress TSH levels like quality nighttime sleep does. Prioritize getting your rest during the dark hours.
- Create a Sleep-Conducive Environment: Ensure your bedroom is dark, quiet, and cool to support uninterrupted sleep and align with your natural circadian rhythm.
Healthy habits
Adopting healthy lifestyle habits is crucial for supporting thyroid function, especially because thyroid disorders are closely linked to broader metabolic and autoimmune health.
Key Connections to Thyroid Health
- Smoking: Smoking is known to increase the risk and severity of autoimmune thyroid disease. Avoid smoking since the overall harmful effects would result in severe complications. Source: Impact of smoking on thyroid gland: dose-related effect of urinary cotinine levels on thyroid function and thyroid autoimmunity
- Metabolic Health: Conditions like dyslipidemia (high triglycerides, LDL cholesterol), insulin resistance, and diabetes are frequently associated with subclinical hypothyroidism (SCH). Managing these conditions is an important part of a holistic thyroid care plan.
- Body Weight: Obesity and higher body fat ratios are often observed alongside thyroid dysfunction, creating a cycle that can worsen symptoms like fatigue and weight gain.
