A randomized crossover trial evaluated the efficacy of different l-thyroxine dosing strategies and different target thyroid-stimulating hormone (TSH) ranges in patients with treated hypothyroidism.
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TSH levels decoded and what they mean

Medically reviewed by Kelly Wood, MD Key Takeaways High TSH levels usually mean the thyroid is underactive, which is called hypothyroidism.  TSH levels can change due to factors like age, sex, and ...
New research suggests that a slightly underactive thyroid may affect a women's ability to become pregnant -- even when the gland is functioning at the low end of the normal range. New research ...