Researchers say we should as much as possible avoid skipping meals especially breakfast, this is because food is an essential requirement for the bsody to produce energy needed for work. Skipping meals is a bad habit that if not checked, can cause stomach ulcer.
I believe fasting or skipping meal works well for certain people. I try not to do it for too long though.. I sometimes feed on only very light healthy natural foods like really good oil/fat, fruits, vegetables,, herbs/tea, lots of warm water etc while fasting. I actually recommend the latter for those who are worried about skipping meal. It feels like your body produces gentle blue flame while using those kind of foods
I think a lot of doctors are not actually trained in nutrition and a lot of nutritionists were trained many years ago, anecdotes dont equal science but when you have thousands of succcess stories you have to start thinking that perhaps theres something to it.