Hello,
Loss of appetite (Anorexia) can be of natural disinterest in eating (primary anorexia), or is due to some reversible cause (secondary
anorexia) like Chronic
liver disease , Emotional upset, nervousness, loneliness, boredom, tension, anxiety, loss, and depression, Hypothyroidism ,Infections etc.So for now Increase protein and calorie intake by eating high-calorie, nutritious snacks or several small meals during the day. Liquid protein drinks may be helpful.