You can think of your metabolism a little bit like your utility bill. From neighbor to neighbor, no two utility bills are alike. Some people keep their AC at 76; some keep it at 68. Some take 20-minute showers; some hop in and out in 20 seconds. We all use and consume energy a little bit differently in our homes, and we all use and consume it a little differently in our bodies. And that plays a key role in weight management; some of metabolism is genetic, in that you're pre-disposed to have a quick-working metabolism or a slow-churning one. That regulation comes in part from your thyroid hormone.
Find out more about this book:YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger