Thyroid regulators can be effective weight loss and fat burning supplements because the thyroid gland controls the body temperature and the rate of metabolism. Thyroid regulators can be used by those suffering from hypothyroidism or hyperthyroidism, but have also been shown to be useful to body builders and those trying to lose weight and lower body fat. By increasing the temperature and metabolism of the body, the thyroid regulators function similarly to thermogenic supplements, causing fat to be used more frequently for metabolism as well as burning more calories in general. Guggulsterones are one of the most popular forms of thyroid regulating supplements, but there are others that are just as safe and effective. Though the metabolism does get a boost, many do not contain any stimulants, so it is also friendly for those with a stimulant sensitivity.