The BMR is influenced by the levels of thyroid hormones and the catecholamines epinephrine and nor-epinephrine. Thyroid hormones are thermogenic raising body temperature and Ultra thermo Keto BMR. People with hypothyroidism (low level of thyroid hormones) have a very slow metabolism, tend to put on fat very easily and have difficulty losing fat. People with hyperthyroidism (high level of thyroid hormones) have a very fast metabolism, tend to be skinny and have difficulties putting on weight. The sympathetic nervous system is responsible for arousal and utilizing energy to be used in times of stress or arousal. https://pillsfect.com/ultra-thermo-keto/