To answer your main question first:
No, there is no kind of SAFE supplement or anything that boosts metabolism. Even the horribly unsafe things that make people thin, like crystal meth for example, only do that because they make people nervous and hyper so they're active ALL THE TIME, and kill their appetite so they don't think about eating (mostly because all they can think about is getting more of the drug.)
The supplements you read about that might claim to "boost metabolism*" (they always have that asterisk or the little swordy-looking symbol) contain caffeine to create a mild version of the same effect. The caffeine sometimes works for a week or two by making you more fidgety, but that wears off really fast, and then it *lowers* your metabolism a tiny bit by making you unable to sleep. Most prescription diet drugs basically ARE meth, just a much cleaner version. They're emergency interventions with a lot of risks, only intended for people who are so obese that they're in severe danger from that. No ethical doctor would prescribe something like that for someone like you who is not overweight enough to call it an emergency.
You have a BMI of 27. That's overweight by modern standards, or the top of "normal" for the original BMI scale. Others have said you shouldn't lose weight; I disagree. If you don't at least try to lose a few pounds, you'll likely continue drifting upwards and it will start to affect your health as you reach your 40s.
I know it seems that your metabolism has slowed. The truth is, though, that for most women in their 30s, what has changed is lifestyle. What else are you doing differently from 5 years ago? Have you started living with a man? Women eat more when they eat with a man. Are you working more hours? Do you feel more stressed from your work? Are you eating cheaper food because of the change in the economy? Are you sleeping a little less because you just have so much to do that you stay up later to do it? All of those things affect weight, even though out of that whole list, only sleep actually affects metabolism.
I think that the first step is to track your nutritional intake very carefully. When people say they're "watching calories," it usually means that when they look at the calorie counts on two foods, they choose the one that's lower. That's a start, but it's usually not enough to get you to lose weight. Most people trying to lose weight when they're in that high-normal BMI range need to track EVERY BITE, hopefully before they actually eat. Planning ahead that way can let you make the small decisions that add up to a calorie deficit without a nutrition deficit. It will also let you see whether your metabolism is really lower than normal, or whether you're just eating tiny, tiny extras that put your calorie intake above normal.
When you're in that barely-overweight range, weight loss is a LONG, slow process. My recommendation would be that for the first 28 days, you track without trying to change anything. That will give you an idea of how much you can eat without gaining, and it will also show you if you're eating junk food that's adding calories without nutrients. *Then* you can start trimming calories while paying more attention to the nutritional value of what you eat. At your size, losing a pound or two a month would be the normal rate, so we're talking a year to knock off those 20 pounds. The bad news is that it sucks to have to work for a year, but the good news is that it gives you plenty of time to learn about nutrition and the little odd individual quirks of your own body, so you'll have an easier time keeping those 20 pounds from coming back.
If anybody tells you it'll be easier or there's a faster way, they're lying. But it is possible, and losing that weight by learning to pay intensely close attention to your nutrition will give you the tools to be healthier for the rest of your life.
| current weight: 132.0