Fats will help with weight gain. Try making a smoothing with avocados and whole milk (and fruit of choice) to drink every morning, or dessert. For some people drinking the extra calories is a lot easier than eating them. I hope that helps!

Drinking Boost+ or Ensure+ can also help!

Talk to your dr. I tried to gain weight all on my own and gave myself an eating disorder. Not all eating disorders are about loosing weight. If all else fails though home made bone broth and Pediasure are my go to tricks.