So, due to this h pylori and taking medications, i have lost considerable amount of muscle mass. Whoever sees me says you've gone too thin, which further makes me worried. My appetite is same, my weight used to be 70kgs, its stuck at 65.5 to 66.3 kgs now, no matter how much I eat its stuck there. Only change i have done is I don't eat junk food anymore, since 8-9 months. I eat only homemade food. Since last 2-3 months, i have been in two different antibiotics triple therapy courses for h pylori, due to eating those medications i lost further weight :(. How do I gain weight back? My doctor has advised to avoid milk, fruits and citrus things. Can I take whey protein (isolate)? And can I replace cow milk with soy or almond milk? Please help me to gain weight, i look malnourished now :(. My upper body has shrunk around 4-5 cm :(. Please guide me. My height is 5'7, weight is okay as per this, but i look malnourished due to shrinkage of upper body muscles. Please help!