Sunshine, eating plenty of sunflower seeds and nuts will help you gain weight without taking in plenty of saturated fat or simple carbohydrates. Yes, nuts do have some carbohydrates, but these are not simple carbohydrates, and the percentage of calories from carbohydrates is pretty low. you can use the nutritiondata website to research each type of nut for nutritional profile. Nuts also have plenty of minerals and plenty of protein. some nuts are expensive though, however sunflower seeds and peanuts are cheap. I eat mostly those, but also splurge on some cashews and mixed nuts.