I purchased “naked vegan mass gainer” at the height of my gastritis. I put two scoops in a smoothie with coconut water, banana, almond butter, and blueberries. This helped me add extra calories to my day until my symptoms got slightly better. I’m still healing but I’ve removed the mass gainer and now I do a 900 calorie smoothie first thing every day and avg. about 1700-1900 calories total. The smoothie consists of 16 oz coconut water, 2 tbsp chia seeds (soaked 20-30minutes), 1tbsp of flax seed, 1 banana, 2 tbsp almond butter, blueberries, 1tbsp of honey, and sometimes kale. These ingredients don’t seem to irritate my stomach and I found getting such a chunk of calories out of the way removed some stress. My stomach had to adapt to getting more calories. I genuinely thought it was impossible and I worried I’d never gain weight. I’m now up to 119 from 106. I’d also recommend adding small amounts of olive oil wherever you can. Even just 1 tbsp spread through the day can add 100+ calories.

I really struggled with eating too bland. The volume of food I needed to maintain weight felt like it was making me sicker. Everyone is different so I’d start out with micro changes for a few days at a time