Are hypothyroidism and hyperlipidemia related?

Yes: Hypothyroidism is associated with increase in blood lipids, including cholesterol.

Yes: Your metabolism is slower with hypothyroidism. This will slow down your body's ability to clear or break down cholesterol effectively, leading to higher cholesterol level.

Mixed hyperlipidemia: People with hypothyroidism can have a mixed hyperlipidemia with elevation of both cholesterol and triglyceride. Once this is adequately treated with levothyroxine, however, the thyroid-related component of the hyperlipidemia should be eliminated.