It will always be true that losing weight is much harder than not putting it on in the first place.
There is no safety zone that is immune to this fact. Children who are obese are at risk for heart disease, diabetes, and more at an early age. Children too easily model their habits on their parents’ habits, and thus the cycle of obesity is passed on from one generation to the next.
Our bodies are designed to remain in balance, and when they go out of balance, a natural mechanism has been interfered with. Usually this occurs through decisions that we make that turn into habits. Decisions are conscious and can be reversed. Habits are unconscious and are considerably harder to reverse. Even so, the more awareness you can bring to any health issue, the better your chances of reaching a solution.