Be a Good Example
You need to teach your child to eat healthy food and you need to start teaching them these things from a very early age.
One of the best ways to teach your child to be healthy would be to set an example and eat healthy foods yourself. Think about it, your child follows everything you do and uses you as their example for what you are supposed to do and how you are supposed to act in life. Therefore, if you set your child a positive example and make sure that you eat a healthy diet they will almost surely follow suit and see it as a normal thing to eat healthy foods.
Another good way to teach your children about the importance of proper nutrition is to learn how to limit the amount of sugary treats and other types of unhealthy snacks that you introduce into their diet. Make sure that your child knows that it is alright to have an occasional chocolate bar but make sure that they also know that it is not a good idea to eat one every day.
Try to keep more healthy drinks around the house as opposed to having an endless supply of fizzy drinks. Raising your child to enjoy healthy food will likely lead to them continuing those eating habits throughout their life. On the other hand, raising your child to enjoy unhealthy food will also likely result in your child continuing those eating habits throughout life.
As mentioned before, teaching your child to eat properly and to have a nutritional diet is extremely important for the development of a child. It is best to start this process as soon as possible because children absorb information like a sponge, especially in their earlier years.