I'm getting annoyed with constantly being told this

With hypothyroidism, one already has a slow metabolism, the thyroid hormone has an effect on EVERY ORGAN and ORGAN FUNCTION in the BODY. Pretty much when you are in a HYPO state you are SLOW, the stimulation to eat is decreased and the stimulation to process is decreased and you hold on TO EVERYTHING. I know from experience and through my practice and education as an advanced practice nurse. I have the lowest functioning thyroid known to man....lol..... Im on 200mcg synthroid..... and for those of you that dont know thats alot. People tell me you have to eat so many meals a day and so on and so on blah blah blah blah... but you know what IM NOT HUNGRY because my thyroid wont let me be and when I force myself I GAIN. But I found the formula that works for me even if I only eat 1-3 times a day, you have to listen to your body you have to know yourself, it took me a long time but im doing it. And I did it through eating right (FOR ME) and working out.

I forget my dosage offhand, but I'm up there as well, over 100. and I don't feel it's really working for me, I haven't gotten blood drawn in months because of not having insurance. I know how the thyroid works though, and it SUCKS!! Stupid hormones... something so stupid and little, controlling everything in your body, kind of crazy.

If one eats less than what one burns, one will lose weight.

It's not always the case, in my opinion. I get the science of it, I do. But it's not the same for every single person.

Just normal daily living burns about 2,000 calories. On a diet for nearly 3 months, I was eating 1200-1500 and in that 3 months, lost 3 lbs. I have hypothyroid, it's hard for me to lose weight. Why do people seem so hellbent on the theory of weight loss, isn't it different for everyone? Because I know it is for me. Maybe I'm the only one, like ever... but I know for a fact it's different for people with thyroid issues, and diabetes in some cases too.

Yes, it is calories in vs. calories out. The key is - we're not measuring the right things.

If an item has 300 calories according to a package, that does NOT mean that YOUR body is going to absorb 300 calories out of it. Some of us are super absorbers and actually break down food better than others. And some of us DON'T absorb as much as others. A perfect example of this is kids with Cystic Fibrosis. Because they end up with a mucus lining in their intestines that blocks their ability to absorb food, they HAVE to eat a ton of calories just to stay alive because they aren't getting 100% of what they eat. In fact, they actual prescribe bile salts & pancreatic enzymes to BOOST absorption for people who aren't absorbing as much as others. This means someone who produces an excess naturally would absorb more than a normal person.

And just because someone SAYS we burn XXX calories per hour being alive does NOT mean that YOUR body burns that. Bodies are designed to take care of certain functions before others. For example - if your body temperature is 97.6 instead of 98.6, you require less energy for a day than someone who is exactly the same height, weight & gender but who's body temperature is 1 degree higher. The very definition of a calorie is how much energy it takes to heat a liter of water 1 degree,

There are other functions which may not be working at 100% (especially for people who are hypothyroid or insulin resistant) that require less to function. This is what metabolism is all about. Just like when your bank account is low, suddenly you skip the name brand and buy generic. You decide maybe you DON'T need to see the dentist this month, or maybe you'll just patch that tire instead of replacing it. You find ways to get by on less - it doesn't mean you're getting the same quality of life (physically or financially), but you're taking care of the essentials.

So while it is true, calories in vs calories out, you have to take into account ALL of the ways in and out. If you're not absorbing something, it's going "out" via pooping, not via sweat or calorie burning.

I agree! had my thyroid removed and on thyroid replacement and have a very difficult time losing weight. at 1200 cals a day and running 5-7km 3 days a week and doing other workouts as well, only lose maybe a pound a week if I'm lucky. MFP seems to think that I should be losing 2 lbs a week with my cals, no way!

Yeah, I'm at 2 lbs a week now as well. My first day on the site was yesterday, so in two days, I dunno if I've lost anything, no scale at my house which is probably a good thing. My thyroid is super low and I'm on medication for it. The doctors said on the meds, it would help with weight loss and my sleep patterns, I notice no difference in either.

where's 2 days coming from? In my post it says 3 MONTHS and 3 lbs down.

My first day on the site was yesterday, so in two days, I dunno if I've lost anything

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Soooo... you ARE eating less than you are burning AND you are losing weight... so it is the same for you?!?!?! What's the problem?
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Being Snarky is not necessary here. If she is having a rough time, then she is simply having a rough time. Maybe try being supportive? Just saying.....