Nobody is glossing over it, it is subject of active research. Until that research produces any generally useful results (drugs, tests, treatments), the advice s

Nobody is glossing over it, it is subject of active research. Until that research produces any generally useful results (drugs, tests, treatments), the advice stays the same. We know exactly one applicable test: thyroid hormone levels. This one is worth checking. Eat less everything but more fresh vegetables, especially greens, exercise more. How much depends on how fat you are - not necessarily just overweight, body composition and fat percentage is more important and still reliably measurable. "Toffee" kind of fat is a thing, where a thin looking and not very heavy person is actually fat inside, just lost muscle so weight stayed similar. On the other hand, nobody wants people with big muscle mass to always cut diet to levels expected of show body builders.