Essential T2 is not considered a weight loss supplement. It is considered a thyroid support supplement that was designed to provide thyroid patients with a more balanced thyroid hormone profile. Having said that, studies that evaluate the effect of T2 thyroid hormone on the metabolism have been positive. It's clear that T2 thyroid hormone does have some impact on both metabolism and the T3 receptor. One animal study showed that using 300mcg/day of T2 caused a significant increase in resting metabolic rate (metabolism) with a corresponding decrease in body weight over several weeks (6). These benefits were seen without altering free T3, free T4, and TSH levels. When used correctly, and in conjunction with healthy lifestyle changes, it's possible that weight loss may be a positive secondary side effect of its use. I don't recommend using T2 for the primary purpose of weight loss, though. It's best used to provide your body with normal thyroid hormone regulation and if the result of that is weight loss, then that's great. But the potential for abuse is too high which is why it should only be used by those who need it (those with thyroid dysfunction). If you are a thyroid patient who is struggling to lose weight, optimizing your thyroid function is a necessary step as it controls and regulates your metabolism. When using any thyroid support supplement, including Essential T2, combine it with a healthy whole-food diet, regular exercise, and intermittent fasting for the best possible results.