Menopause and Metabolism

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I was wondering if there is any advice that anyone could offer to help speed up my metabolism during menopause? Chemo and radiation has caused early menopause for me therefore causing it to be completely difficult to lose weight. I've lost 5lbs but it's taken me 2 months to do so. This is with calorie reduction and exercise. It seems that no matter what I do, I can't lose the weight. Any help you can offer would be greatly appreciated! Thank!