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METABOLIC SLOWDOWN and HASHIMOTO'S HYPOTHYROIDISM         What can we done? 

12/01/2026

Hashimoto's thyroiditis is often associated with slowed metabolism, fatigue, and weight gain. It is important to understand that this is not merely a thyroid problem, but a complex autoimmune condition that affects the functioning of the entire body. Proper management does not consist solely of hormone replacement: lifestyle, nutrition, and stress management play a key role.

One of the foundations of supporting metabolism is ensuring that the body is not in a prolonged state of calorie and nutrient deficiency. Excessive dieting can further slow metabolism and impair hormonal balance. Adequate protein intake is essential, as it supports muscle building, liver function, and the activation of thyroid hormones.

Gut health is also a determining factor: the gut microbiota participates in the conversion of thyroid hormones, and approximately 70% of the immune system is located here as well. Gastrointestinal infections, such as the presence of H. pylori, can increase inflammation and hinder improvement.

When it comes to physical activity, the principle that "more is not always better" applies. Excessively intense training can worsen the condition, whereas regular walking and moderate strength training improve metabolism and insulin sensitivity in the long term. In addition, stable blood sugar levels, adequate sleep, and the reduction of chronic stress are fundamental prerequisites for regeneration and improved energy levels.

The role of herbs and natural active compounds in Hashimoto's

In the complementary support of Hashimoto's thyroiditis, the goal of herbs and natural active compounds is not to replace hormone therapy, but to finely tune the body's balance. The primary focus should be on reducing inflammation, regulating the immune system, supporting the gastrointestinal tract, and improving stress tolerance.

Anti-inflammatory plant-derived active compounds (e.g. polyphenols, flavonoids) may help reduce autoimmune processes and oxidative stress, which are often increased in Hashimoto's. Such compounds can be consumed in natural form from herbs, extracts, and phytonutrients.

Herbs that support the gastrointestinal tract (e.g. mucilage-containing plants, bitter compounds) may contribute to protecting the intestinal lining and improving digestion. This is particularly important because the condition of the gut has a direct impact on immune system function and the utilization of thyroid hormones.

Stress-adaptogenic plants support the body's ability to adapt under chronic load. Prolonged stress negatively affects the conversion of thyroid hormones and metabolism, therefore supporting the nervous system and the adrenal axis is essential.

It is important to emphasize that in the case of Hashimoto's, there is no need for "stimulating" thyroid herbs, but rather for balancing, anti-inflammatory, and supportive active compounds. The effects of herbs are gradual and manifest over the long term, and they exert their beneficial effects best in combination with lifestyle and nutritional changes.

Details: 

Anti-inflammatory and antioxidant active compounds
• Polyphenols and flavonoids – reduce oxidative stress
• Curcuminoids – support the reduction of chronic, low-grade inflammation
• Omega-3 fatty acids – may help balance the immune system
• Plant-based antioxidant extracts – protect cells from free radicals

Active compounds supporting the gastrointestinal tract and immune system
• Mucilage-containing herbs – protect the intestinal wall
• Prebiotic plant fibers – nourish beneficial gut bacteria
• Bitter compounds – support the production of digestive secretions
• Plant-based antibacterial active compounds – may help restore the balance of pathological gut flora

Stress- and nervous system-supporting (adaptogenic) active compounds
• Adaptogenic herbal extracts – improve stress tolerance
• Plant-based calming active compounds – support nervous system balance
• Magnesium and B-vitamin support – assists nerve and hormonal function
• Plant ingredients supporting sleep quality

Active compounds supporting metabolism and hormonal balance
• Amino acids supporting protein metabolism
• Micronutrients supporting thyroid hormone conversion
• Plant components stabilizing blood sugar levels
• Active compounds supporting muscle metabolism and energy levels

General supportive micronutrients
• Selenium – contributes to normal thyroid function
• Zinc – supports the immune and hormonal systems
• Iron (when needed) – important for oxygen transport and energy
• Vitamin D – a key player in immune system regulation

The above excerpt is based on a report by Dr. Izabella Wentz in Thyroid Pharmacist.