When researchers started looking at the healthiest peoples in the world, they found that most of them live in the undeveloped countries, where they eat just basic foods that they can grow, or find growing wild, and often they only eat once or twice a day. It is the people who live in the countries where we have more money and more food available that is where the people are the least healthy, and have the most obesity and the most chronic illnesses.
I have read that Japan is a good example of this. For many years, the Japanese people ate just a basic diet of fish, rice, and vegetables, and were very healthy. Then, more of the fast-food places like McDonalds, started expanding into other countries of the world, and after these kinds of food became available in countries like Japan, their heath has eroded, and more of them are becoming overweight and contracting illnesses like diabetes, which comes from eating the wrong kinds of carb foods in excess.
It seems like many people here buy their food already prepared now, or at least it is processed foods that we buy at the grocery store, People no longer have their own garden and raise their own fruits and vegetables, and we are more apt to eat an apple turnover than a real apple.
Going back to eating fewer meals would be a start for people becoming healthier again.