[hulton]

For most people: If Calories In > Calories Out, you're going to gain weight if you're consistently eating that way for long periods of time. It doesn't matter where your surplus of calories is coming from necessarily. However, a surplus of calories coming from carbohydrates is more likely than fat and/or protein for most people. Having said that, high fat intake + high carb intake is also common for many people, especially if you eat out.

http://www.bodyforwife.com/keto-and-low-carb-diets-kill-perf...

[InTheArena]

Weight is only one factor though. Congestive heart disease and diabetes and cancer are the real risk, and there is a ton of evidence that simple sugars a drive the growth of these diseases.