My experience with low carb is that calories control my weight. I am T1.5 / LADA not on meds or insulin... I can still, just, produce sufficient insulin to support myself and I eat to my meter.
I have been low carbing for a year now, starting 150g now down to 30g per day.
6 months ago my weight hit an all time unhealthy low due to trying to keep my BG levels low, so to correct this I increased my calories, without increasing my carbs. My weight increased, but so did my BG levels.
I concluded that I was eating too much protein (10g protein = around 5g carbs), so I reduced my protein, kept carb levels the same and increased fat (an increase in fat corresponds to an increases in calories)
This has resulted in lower BG levels and maintained weight (which is what I was aiming for).
Net result is I am now LcHf (low carb high fat)..... Not what I intentionally set out to be, but by eating to my meter and bathroom scales, this is the net result.
My conclusion from my experience:-
* Low carb, low fat, low protein = weight loss and low BG levels
* Low carb, high protein, low fat = medium BG levels, maintain weight
* Low carb, med protein, high fat = low BG levels and maintain weight.
I am healthier, have more energy, much fitter, more active now on LcHf than before, and importantly can keep my BG levels stable and below NHS guidelines.
My dr says... Whatever you are doing, keep doing it, because it is working.