Congratulations Liam!
I've read some of the reviews here and disagree. This is an important message for a lost society. The rate of obesity is climbing as more and more families don't have the time for family sit-down dinners.
First, there is no denying that what you bring into your house is what your children will eat. In Liam's case it's not necessarily his choice what his father brings into the house. This film is obviously directed at parents.
Second, a low-income single parent CAN find it extremely difficult to find time and money to manage healthy meals. In this case packaged foods loaded with preservatives are the solution (no market is neglected these days regardless of the health outcome for the consumer). It's up to us to choose wisely. Good or bad, it is what it is.
Third, changing poor habits can be extremely difficult and requires will power and potentially some discomfort. If this is what other's are balking at, well, we just have different world views. Good habits are built by repetition, practice and conviction. Believing in the long term benefits of your transformation is paramount
Fourth, medical doctor or not there is no doubt that a healthy diet is better than an unhealthy one. It's fairly easy to find information on what a healthy diet is, and this movie doesn't mislead in that regard.
The case is made for prioritizing healthy foods.
The case is made for prioritizing exercise over a sedentary lifestyle.
The case is made for physical and emotional well being at a healthy weight.
Liam should be proud of what he accomplished while recognizing that his family did their level best to help him get there. They showed him the path but he had to go down it.
Understanding that there can be challenges and discomfort in life at 11... no big deal. Learning that you can change your life by changing your own habits... priceless.