TDEE/BMR abbreviations

Basal Metabolic Rate and Total Daily Energy Expenditure

BMR = The amount of calories your body would burn if you were literally in a coma ie. doing nothing.

TDEE = The amount of calories your body will burn doing your everday activities ie. getting dressed, taking a shower etc.

Hope that helps! x

For me personally, it's the theory that makes the most sense to me as it seems to be based on actual fact. It doesn't speed up weight loss, in fact if anything it stabilises your body and makes you lose at a slow but steady rate. A way that I personally think is more likely to stick and the weight will stay off. It can be done at any point in your weight loss journey.

If you do choose to try losing weight this way then be warned that if you end up upping your calories quite dramatically, which is what I did (I went from 1200 daily to 1675 daily), it will take your body a few weeks to adjust and realise it's not being starved anymore, so there's a chance that you won't see much change on the scale but it's very likely that you will see inches coming off instead

Have a read of this:

http://www.myfitnesspal.com/topics/show/974888-in-place-of-a-road-map-2k13

A long read but spells out exactly why the TDEE method works