Dietary restriction, such as vegan or ketogenic diets, can indirectly lead to lower energy intake and weight loss.

“the second way that you can go about doing this is indirectly through dietary restriction right so you just you talked about a vegan diet hey you're taking a lot of things out of the diet um and many of them are energy dense so there's a very good chance you're going to lose weight just on the basis of the Restriction similarly with a ketogenic diet or something of that nature you're going to really generally eat a lot less and it's that uh effect of the diet on perhaps your appetite and food choices that's going to result in lower energy intake and therefore for energy imbalance”