If your thyroid is not functioning optimally, it is nearly impossible to lose weight. Proper thyroid balance determines how much energy you have and how fast your metabolism burns. The catch-22 is that a low calorie diet will often impair thyroid function, causing it to release less thyroid hormone. So the harder you try to lose weight, the slower your metabolism can get. In fact, low thyroid function is one of the largest contributors to weight gain. That's why America's Nutrition offers thyroid health supplements like Thyrozene and TIGHT. You're working hard and eating right, and you deserve to lose the weight. Use our products to ensure that your thyroid is functioning optimally. You'll discover new reserves of energy, and you'll feel and look great.