Losing Weight
There are essentially two ways to get things in life, you can either force people to give you things, or steal them, or you can convince them to peacefully hand them to you. The first way is not so effective. You might get away with it for a while, but people will not like you, and will probably seek to harm you or get even eventually. The second way is difficult but more sustainable. If you convince someone that you should have something then they are convinced, and there are no repercussions.
The body is like this as well. There are two ways you can go about getting your body to do what you wants if it is not doing what you want it to do. You can take a drug which will force your body to do something, and it will be efficient and effective, but it will react to being forced, thus side effects. Over time your body will simply give up and become dependent on being forced–it will lose capacity and therefore vitality, and all the connected functions will be effected. Or, you can gently seek to persuade your body with good foods and perhaps an herb or two if you want to make a stronger case. This is hard, and it takes long, but it empowers your body instead of robbing of capacity. Sometimes you may need force, but persuasion better not be far behind for long term health.