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

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Table of Contents

Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Bovine (unspecified), often referring to desiccated bovine thyroid or other glandular extracts, has a history of traditional use to support thyroid gland function. This practice dates back to the early 20th century, when desiccated animal thyroid glands were used to treat hypothyroidism before the advent of synthetic levothyroxine. Traditional medicine systems, such as organotherapy, have also promoted the idea of "like supports like," suggesting that consuming animal thyroid tissue could benefit human thyroid health. However, scientific evidence supporting the use of general bovine (unspecified tissue) for thyroid support is limited and largely outdated. Most clinical support exists specifically for desiccated thyroid extracts, which contain measurable thyroid hormones (T3 and T4) and can have pharmacological effects—though this is now considered risky due to dosing inconsistencies and potential for adverse effects. There is little to no robust evidence that other non-thyroid bovine tissues (such as generic "bovine" ingredients) support thyroid function. Modern regulatory agencies discourage the use of animal thyroid extracts due to safety and efficacy concerns. Therefore, while there is a historical basis for the use of bovine thyroid in thyroid disorders, current scientific validation is weak, and the safety profile is questionable. Most commercial supplements labeled as "bovine" for thyroid health are based on this traditional use rather than well-supported research evidence.

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