That would apply even if you were obese. But I'm assuming you're not. Based on what you said, I'm assuming you're within the normal range.

In that case, losing any weight super slowly goes double. Don't go on crazy diets, don't mess up your metabolism. Don't cut out any foods, don't cut out "bad" carbs or fats... I really do think it is unhealthy to lose weight quickly, or to be constantly losing or gaining weight relatively quickly. Easy come, easy go. I don't mean natural fluctuations of a couple of pounds. I mean gaining or losing 10+ pounds repeatedly.

For people who are fat, ideal weight loss should be 1-2 pounds a week. If you're not that fat and want to lose weight for reasons of vanity rather than health, it should be more like 1 pound a month. Or a year, really. I lost a lot of weight from age 18 to 21- about 2 pounds a year. I'm not saying that I weighed the same in December and in August, or on different times of the month or days of the week. It's my *range* of weight that shifted, however slowly.

Vast majority of people who lose weight quickly enough for it to be noticeable will gain it back, and then some. So try not to get on a "lose 10 pounds in time for bikini season!" type of plan.