My son has had a severe stomach flu. We then discovered he is dealing with a stomach ulcer. I've been following an ulcer-healing way of eating that involves no nuts, citrus, or spicy foods. But he told me this morning, he's worried he's still losing weight (lost weight during the flu because of not eating and vomitting). So he experimented yesterday morning and had a little almond butter on some millet bread I made.

I have a list of ideas for gaining weight but most of them are based on using natural fats--nuts, seeds, olives, avocados. Fat builds acid in the stomach so we are trying to avoid these right now. Do you have any other natural ways to gain weight on a plant-based diet?