however if you eat foods with, say, a lot of sugar or other simple carbs, you blood sugar will not be stable and
that sugar is likely to turn to fat, much more quickly
than lean protein and
complex carbs (whole grains, nuts, seeds, etc.). Plus high sugar or high fat foods will leave you hungry much more quickly than the lean protein and complex carbs.
If you care to give us more information, about yourself, maybe we can help you figure out what the problem is.