I’ve heard that you need fat to aid in the digestion of other foods. If a food has very little fat, should some be added? Also would the same go for adding protein?
Fats are a foundational macro for hormone production and stabilization of the body. Testosterone, Estrogen, Cortisol. Dietary fat and “bodyfat” are not the same thing and often get confused. Fats are also used for brain function, serotonin levels in the body. So yeah…fats are important from a health standpoint.
Fat can be necessary for the absorption of some fat soluble nutrients like vitamin D.
You have to be very careful in nutrition about making all encompassing statements about all situations.
There are situations in which you want to consume meals/foods with minimal to no fat and that’s mostly protein and carbs or all carbs. Mostly this would be applicable for an athlete looking to meal time. Fat delays absorption. Not ideal for a situation which you need fast digesting carbs.
However all meals with no fat is going to pose a malnutrition problem.
What matters is the whole picture, not isolated circumstances. If the goal of a meal is just to provide you with your daily nutrition then yeah safe to assume you want that to be balanced in macros.
Little fat is fine. Adding fat will quickly increase caloric intake for not much benefit
People already get about twice as much protein as they need. You could more that likely reduce your protein and be fine