Thyroid hormones are known as important modulators of general metabolism.1 These hormones regulate energy metabolism in which carbohydrates and lipids are the major constituents.2 Thyroid hormones affect lipid metabolism by increasing lipolysis in adipose tissue and stimulating lipogenesis by increasing the activities of some enzymes.3 The serum cholesterol level generally changes inversely with thyroid activity,4,5 however, there are some contradictory findings regarding the relationship of serum thyroid hormones with cholesterol and triglycerides in camels. This evidence concerns the gene TG and thyroid gland disorder.