Thyroid regulators can be effective supplements for weight loss and fat burning because the thyroid gland controls body temperature and metabolism. Thyroid regulators can be used by those suffering from hypothyroidism or hyperthyroidism, but have also been shown to be helpful for bodybuilders and those trying to lose weight and lower body fat. By increasing body temperature and metabolism, thyroid regulators work in a similar way to thermogenic supplements, meaning that fat is used more often for metabolism and more calories are burned overall. Guggulsterones are one of the most popular types of thyroid regulating supplements, but there are others that are just as safe and effective. While metabolism boosting, many do not contain stimulants, so they are also friendly to those who are sensitive to stimulants.