Fungi is the original network of planet earth way more complex than what humans ever created. It transmits food both and information between different species of plant/fungi/animal kingdom.
Main question should be: why are we not connected to this network?
"Animals tend to find food in the world and put it in their bodies; fungi put their bodies in the food. To do so, they must ceaselessly remodel themselves, weaving their bodies into relation with their surroundings. This entanglement—with themselves, with their physical surroundings, and with other organisms—is their staple mode of existence. "
A book I would like to recommend - Michael Pollan "In defense of food: eater's manifesto"
Author of this book provides one of the best formulas (in comparison with the current research results) for healthy eating - "Eat food. Not too much. Mostly plants". Nothing else needs to be done or followed (my minus 14 kilograms also support that statement).
Food - meaning everything that does not have the the content labels (or is made from such products) and is not called after complicated chemical formulas. Food starts turning bad in a few days (meaning it is edible for microorganisms and fungi). Food that does not turn bad is not a food.
Not too much - means that food is to deal with physical hunger (and not the emotional hunger). Eat as much as you need. If you eat too much - you have overweight (of course, if you do not have any endocrine diseases).
Mostly plants - meaning you eat enough of the food that the most beneficial gut bacteria like. That means a lot of fiber, many microelements, and no overestimation of importance of meat and dairy.