The main benefits of T3-Cytomel include- synthesizing protein in your body, increasing the muscle mass and burning the extra fat in the body. The excess use of T3-Cytomel can trigger nervousness, vomiting, increased appetite, stomach cramps, excessive weight loss, irritability, temporary hair loss, menstrual cycle changes, too much sweating, diarrhea, insomnia, fever and upset stomach. T3-Cytomel affects the levels of blood sugar in diabetic patients and they may experience signs (of high blood sugar) like- an increased frequency of urination, increased thirst or hunger and unusual sweating. It is advised to take 250 mg of T3-Cytomel in a week, do not consume more than this quantity as it can lead to serious effects.