Think not? Check out the portion distortion articles and slide shows at the National Institutes of Health.ģ5 pounds potatoes (makes 50 pounds, or about 3 1/2 gallons salad) These tables reflect CURRENT (2015) usage. These amounts are calculated to serve 100 on a buffet - they already include appropriate extra to allow for seconds.įAQ: Why do your amounts differ from other tables on the web? In the USA portion sizes have nearly doubled since 1980.