Hello all
I realise that this post got long, so I'll summarise here, and then expand afterward: thyroid treatment now probably optimal; low resting metabolic rate; how to lose 15-20 kg?
So, now, I feel well enough to try to lose weight again. Yes, it is real weight, not retained fluid. I'd like to lose about 30 kilograms to get to my pre-kid weight, but I think that 20 kilograms (or maybe even 15) is a more realistic target.
I have successfully lost weight in the past doing, effectively, one form or the other of daily calorie restriction. Hypothyroidism, a (now low dose) SSRI, three diets and many bouts of health related weight loss mean that my resting metabolic rate is really low. Each time I've lost I've regained, and a bit more - as seems to be the pattern with reduced RMR. I am very concerned that calorie restriction will lower my RMR again and I'll end up in even a worse state. It is now very difficult to lose weight.
I've been reading, and it looks as though intermittent fasting is a way to lose weight without the impact on the RMR. The way it's been explained is this. You take in 2000 calories a day; reduce it to 1500 calories a day to lose weight. The body thinks "Oh no! This is the new normal!" and reduces the RMR to accommodate the new reality. Intermittent fasting (and a normal intake other than that) apparently does not send the same signal to the body to lower RMR and instead just dips into the body's fat stores. It also seems that low carb or even keto to suppress appetite and make fasting possible/not miserable is helpful. Personally I have felt well on keto in the past but for social reasons I have ended up falling off the wagon.
I'm on 3 grains of NDT now and based on my last blood test that *should* be close to optimal from an FT3 perspective (and should have been for the past 7-9 months or so); I'm due a blood test soon and we'll find out then.
So, what to do? I know that both IF and low carb are somewhat controversial, and some people think that both are harmful for the thyroid. I don't think my thyroid does much useful, if anything. I have read a lot of "get your FT3 optimal and the weight will come off" but it doesn't sadly.
Cheers