Evidence supporting the use of: Fat (unspecified)
For the body system: Thyroid Gland

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Dietary fat plays a significant role in supporting the thyroid gland and overall thyroid function, with validation from scientific research. The thyroid gland relies on various nutrients and biochemical processes, some of which require adequate fat intake. For example, the production of thyroid hormones depends on the presence of cholesterol, a type of fat, as it serves as a precursor for hormone synthesis in the body. Additionally, certain fats—especially omega-3 fatty acids—have been shown to help modulate inflammation, which can influence autoimmune thyroid disorders such as Hashimoto’s thyroiditis. Studies have found that both insufficient and excessive intake of dietary fat can affect thyroid hormone levels, potentially impacting metabolic health.

However, not all fats are equally beneficial. Saturated and trans fats may have detrimental effects, while unsaturated fats, particularly those from fish and flaxseed, may offer protective benefits. There is also evidence that very low-fat diets may impair the conversion of T4 to the active T3 thyroid hormone. While fat itself is not a direct treatment for thyroid disorders, adequate and balanced consumption of healthy fats is recognized as important for optimal thyroid health and hormone production. Overall, scientific evidence supports the inclusion of fat in the diet as part of maintaining thyroid function, but the type and amount of fat are crucial considerations.

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