Calories in, calories out is not the golden rule, and this has been scientifically proven false.
Also, hilarious adventure I went on once: I ate 4000 calories of bacon a day and nothing else for a month... ended up cutting it off a little early because I was losing weight too quickly.
Your second and third points however are scientifically supported, but do not confuse this with "obesity is complicated." It is not how many calories you eat, it is where they come from.
I used to weigh 340 pounds, I went strictly Paleo, did not increase caloric burn, did not decrease caloric intake in any meaningful way, hit 214 in a year, and then continued dropping; roughly 2000 calories a day and not a lot of exercise (was afraid of joint damage due to weighing so much).
Also, hilarious adventure I went on once: I ate 4000 calories of bacon a day and nothing else for a month... ended up cutting it off a little early because I was losing weight too quickly.
Your second and third points however are scientifically supported, but do not confuse this with "obesity is complicated." It is not how many calories you eat, it is where they come from.
I used to weigh 340 pounds, I went strictly Paleo, did not increase caloric burn, did not decrease caloric intake in any meaningful way, hit 214 in a year, and then continued dropping; roughly 2000 calories a day and not a lot of exercise (was afraid of joint damage due to weighing so much).