Hyperthyroidism has the opposite effect on cholesterol. It causes cholesterol levels to drop to abnormally low levels.

Can thyroid meds raise your cholesterol?

Patients with hypothyroidism adequately treated with levothyroxine have higher levels of cholesterol compared to healthy controls. Patients with hypothyroidism adequately treated with levothyroxine have higher levels of cholesterol compared to healthy controls.

Is there a connection between thyroid and cholesterol?

Thyroid hormones help your liver process blood. When your thyroid hormone levels are low, your liver processes blood more slowly, which can lead to higher levels of cholesterol in your bloodstream. That can cause a buildup of cholesterol in your arteries.