Tips for gaining weight

I've been trying to gain weight for years, just a few kilos is enough but nothing seems to work for me. I've been struggling with being underweight since I was 2 after a series of medical emergencies. You can ask me questions in the replies if you want to know more for more precise advice regarding my case.

If anyone has tips on how to make your stomach stronger and prevent it from locking up during the last bites it is also very much appreciated. 

eat raw meat, drink raw milk, drink aajonu's "detox juice", eat organs, eat alot of fruit, eat raw fish, avoid carbohydrates, they fill you up but give you no nutritional value.

Aajonu's detox juice can be found in this food book: https://aajonus.net/the-food-book