what exactly do thermogenics do to the body?

Answer 1

As the name implies (if you understand Greek) thermogenics warm the body up. The fact that your body now has a higher operating temperature means that more calories are burned than if you weren't taking the thermogenic product.

However, it should be noted that your body builds up a tollerance for thermogenic products and they will not be all that effective after 6 to 8 weeks of use. So it is important to cycle off of them for at least a couple of weeks before starting back on them. Most combine this with a carb cycling diet as well. Low-carbs and thermogenics and high aerobics for 6 weeks. Then no thermogenics and higher carb intake with less aerobics and more weightlifting for 6 weeks. That way you do a period of fat-burning, followed with a period of muscle building. It is a 2 steps forward, 1 step back sort of approach which is supposed to leave you leaner but more muscular. And the increase in muscle mass helps you to burn fat more effectively as well.