I have to diasgree, it is true during the first days of eating in a deficit, your body lowers it's BMR but that is around ~50 kcal. But it soon raises again to maintain body-temperature. The body is adative to a whole lot shit!  I see a problem with such Articles, it will be the new PCOS, or thyroid for them. because they don't understand any principle behind that, they totally overexaggerate this fact. in their head their BMR drops to zero and they will pile on fat... it's annoying. With a basic concept of Thermodynamics and Osmosis, So much fatlogic can be debunked.