Do low calories really slow metabolism?

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Joined: Jan 13
Posts: 15

Posted: 05 Dec 2017, 11:20
As I move along on LCHF I find that my calories are dropping lower and lower as I'm satisfied with less and less food... I'm now starting to worry that I may be permanently damaging my metabolism. So many health "facts" have been debunked and I'm wondering if this is one that I should legitimately be worried about, or if it's just hokum?

Joined: Jun 17
Posts: 94

Posted: 05 Dec 2017, 11:33
I have found it takes the addition of CALORIES and an increase to ACTIVITY to ramp up one's metabolism. Of course, that could simply be how MY body reacts (and no one's else, since I'm a bit of an outlier when it comes to how one should lose weight). So... I'm leaning towards "hokum" in light of the industry "facts".

Joined: Jan 13
Posts: 15

Posted: 06 Dec 2017, 05:07
Thanks! Doing internet research has not yielded anything very conclusive to me other than to confirm that no one really knows anything. Smile "Facts" (like fat makes you fat) are frequently changing as medical science evolves and I'm hesitant to take any of that 'old-timey' advice as fact anymore. I certainly don't want to force myself to eat because I see that going so poorly for me. SO for the time being I'm going to keep doing what I'm doing. Maybe try to focus on some higher calorie on-plan foods to see how that works for me. Unfortunately my activity is pretty low right now being that both my jobs are desk jobs and the only time I'm not working I'm either cooking or sleeping. This too will pass though and I'll get back to my daily walks and weight training. Thanks again for the input!

Joined: Feb 17
Posts: 25

Posted: 09 Dec 2017, 03:34
Less calories and slowing of metabolism.....yes. Permanent....only if you reach room temperature. relative and tough to measure so depending on the Woo peddler they may have you believe damage and doom but simply put less fuel (calories) = a slowing metabolism but not a damaged or 'permanently damaged' unless someone is selling a book or a diet plan.

Joined: May 17
Posts: 168

Posted: 28 Jan 2018, 15:03
I have hypothyroidism and see an endocrinologist. He tells me not to cut my calories too low, because i will slow my already slow metabolism.

Here's a way to find out if you might have a thyroid problem. Put a thermometer beside your bed before getting in. In the morning, before getting out of bed or moving around, take your temperature by mouth. If it's below 97.7 degrees, you should get further lab testing done to make sure you're not hypothyroid.

Joined: Jan 12
Posts: 85

Posted: 30 Jan 2018, 09:21
I’ve read a fair bit - and seem to have arrived at the following understanding:

A) Losing weight reduces your basal metabolic rate (you’re carrying less lard around so you burn fewer calories);
B) Losing weight, if you’re not weight training, also results in losing muscle, which burns significantly more calories than fat - so, a double-whammy (hence my drive to 3 X per weeek weight training);
C) Your body DOES respond to significant caloric reduction and increase activity by a thing called adaptive thermogenisis (we have less to burn, so body says to its cells, “burn less”);
D) TA is NOT permanent, and can be modulated by returning to a normal diet and reducing over-exercising.

Many studies which found “permanent plateaus” related to subjects who were reacting their maximum level of fat loss anyway, (4 to 5% body fat) so to say that YOU will plateau on marginal calories is pretty misleading.

Near as I can tell.. the point is to attack your weight, particularly if you’re obese (like myself) and as you approach your goal weight, you begin to taper your calorie reduction and even reduce level of activity slightly to allow your body to get the “signal” that you’re no longer starving.

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