Peanut butter may not seem like a typical “diet” food when reading a nutrition label. After all, peanut butter is high in calories and fat, even for a small portion size of a tablespoon or two. However, many health experts point to peanut butter (in moderation) as a smart option. Certain studies suggest that eating peanut butter can help a person feel full longer, stabilize blood sugar levels and boost metabolism. It’s best to choose natural, unsweetened peanut butter over processed versions.