What do you think about a fast days? Are they benefit for burning a fats?

My daughter decided to add fast days,as avoiding milk and meat meal, very worry for her,as her goal for a fats burning.
And in all religions a fast days are especial condition for soul, and timely limiting in meal are for believer will be a better that condition support, and from a fasting days avoiding are referee as for full or partially for a health condition or by vital reasons cannot change a meal, and meal,drink on fast days are strengthening a soul, not for body damaging, and am as a doctor, as thinking,that limiting protein is bad for health, where our cells containing from it,and in his deficit, you will get slim,just for muscles calculation and not for fat tissue, and when you will suffer because of protein deficit, thus in organism having bad symptoms are skin worsening condition, hairs, hormonal background, lowering memory, work capacity, lowering immunity, and on a fast days a proteins less are compensating with vegetable,as kidney beans, lentil, peas, nut, fish, sea meal, Arachis, seeds sunflower, tofu cheese, cereals, macarons, millet, rye, and fast meal does not weight low, as am think,that a potato with vegetable oil,and salted cucumbers or jellied fish soup canned of will raise weight, but you can to try,where to limits or avoid sweet meal, canned meal, salted,marinades, potato, carrot, beet, and use one tbl.sp. of vegetable oil for one meal method, and avoids seeds, nuts, and if yiou can to survive this,thus you can to burn fats..