Any connection between Under Active Thyroid and weight gain?

Same here. Was undiagnosed for a long time.

Sorry typed Gagagrab instead of Gagagran my apologies.

Ditto Gagagrab and GillieB, have been on thyroxine for about 10 years now, used to top the scales at around 9 stone, stuck at a couple of stone over that for the past 5 years or so. Never quite sure whether tiredness and weight gain are down to under active thyroid or the menopause.

I agree one hundred percent with what Gagagran has said. I, too, suffer from an underactive thyroid and I have been taking medication for a number of years, but I still can't get the weight off. However, when you start taking thyroxine you will start to feel better.

Sorry, but because the basal metabolic rate slows in hypo thyroidism, it can contribute to obesity! I'm not saying its the sole cause.

Sorry Sbagran, having been diagnosed with hypothyroidism some years ago I too hoped that the thyroxine medication (which you have to take for life) which was prescribed, would be a magic bullet and my lifelong weight problem would cease.

Well it didn't! In fact the struggle to lose weight continues and it feels as if I am fighting an un-winnable battle with my own metabolism. The advice flows thick and fast - "eat less" "take more exercise" etc. and it is so dispiriting when you are already doing that but still the wretched flab won't shift. Coming from stocky and overweight parents, who both lived to 93, I am beginning to think that some genes just won't be overridden and I have to put up with it.

Good luck though, your genes may be more amenable to slenderness than mine!

Yes! Hypothyroidism can cause weight gain!