Can hormonal birth control cause weight gain or impair metabolic health? If so, which types are more likely to do so?
The first thing to understand is that the ovarian hormones estradiol and progesterone tend to promote subcutaneous fat but reduce visceral fat, which is good because visceral fat is the bad fat tied to insulin resistance or metabolic dysfunction. The second thing is that hormonal birth control mostly switches off estradiol and progesterone.