Anyone here with hypothyroidism?

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I've been trying to lose weight unsuccessfully for the past couple of years. A routine blood test a couple of weeks ago revealed I have hypothyroidism and my doc said that could be the reason I haven't been able to lose weight. I'm on medicine to get it under control. Is there anyone else out there who is dealing with this and could offer advice? I need to get my weight under control (I'd like to lose about 30-40 pounds), but not sure how my thyroid will affect weight loss.