There's some evidence that healthy low carb diets are more effective than healthy low fat diets at changing the ratio of visceral fat to subcutaneous fat.

And another meta study suggests that it's more effective to exercise more (even if you end up eating more) than to solely restrict calorie consumption.

varied diet of whole-foods, calorie deficit, resistance (i.e. weight) training. unless you're like 19, all three are mandatory.

but that's too hard, so people look for quick fad bullshit, ala keto, intermittent fisting, chrono, whatever the current fad is.

Eat less than you currently are