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Vitamin B12 level
Consider formulations that are free from unnecessary additives and align with your dietary lifestyle, whether vegan or gluten-free
When produced excessively, it may suppress the release of Thyroid Stimulating Hormone from the pituitary. 18 It also forces T4 to be converted to reverse T3 (rT3) which actually blocks thyroid function, even though thyroxine levels look adequate when tested. 19 Blood glucose imbalance also triggers cortisol secretion, and insulin resistance may have a direct negative effect on the thyroid, too
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