The top 100 most common ingredients that aren't compatible with each diet. Visit the Ingredient Guide for the full list for each diet.
| Rank | Ingredient | Compatibility | Description | |
|---|---|---|---|---|
| 1 | Gluten | Never Gluten Free | Gluten is a general name for the proteins found in different forms of wheat. | |
| 2 | Wheat | Never Gluten Free | Wheat includes gluten. Check the ingredients if gluten-free is not on the label. | |
| 3 | Starch | Sometimes Gluten Free | If found on a meat or poultry product could be from any grain, including wheat. | |
| 4 | Eggs | Sometimes Gluten Free | May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs. | |
| 5 | Chocolate | Sometimes Gluten Free | Some varieties have a risk of contamination from other products. Read the label to see if gluten free. | |
| 6 | Barley | Never Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 7 | Egg | Sometimes Gluten Free | May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs. | |
| 8 | Malt | Never Gluten Free | Many malted products contains gluten. Check the ingredients if gluten-free is not on the label. | |
| 9 | Seasoning | Sometimes Gluten Free | Some seasonings contain gluten. | |
| 10 | Semolina | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 11 | Durum | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 11 | Meat | Sometimes Gluten Free | Many imitation or processed meats include wheat-based ingredients. | |
| 12 | Chips | Sometimes Gluten Free | Some potato chip seasonings may contain malt vinegar or wheat starch. | |
| 13 | Dextrin | Sometimes Gluten Free | If found on a meat or poultry product could be from any grain, including wheat. | |
| 14 | Dough | Sometimes Gluten Free | May contain gluten. Must be verified by checking the label or by contacting the manufacturer. | |
| 15 | Pasta | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 16 | Stock | Sometimes Gluten Free | Some stock cubes include wheat-based food additives. | |
| 17 | Bread | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 18 | Roux | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 19 | Rye | Never Gluten Free | Often contains gluten. Check the ingredients if gluten-free is not on the label. | |
| 20 | Crust | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 21 | Farina | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 22 | Dressing | Sometimes Gluten Free | May contain malt vinegar, soy sauce, flour. | |
| 23 | Cookie | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 24 | Cake | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 25 | Candy | Sometimes Gluten Free | Some candies include wheat-based ingredients. | |
| 26 | Biscuit | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 27 | Sausage | Sometimes Gluten Free | May contain wheat-based additives. | |
| 28 | Buckwheat | Sometimes Gluten Free | Often contaminated with other grains, such as wheat. | |
| 29 | Tortilla | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 30 | Graham | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 31 | Granola | Sometimes Gluten Free | Some bars may contain wheat as an ingredient, and most use oats that are not gluten-free. | |
| 32 | Spelt | Never Gluten Free | An ancient strain of wheat and contains gluten levels similar to modern day wheat. | |
| 33 | Bulgur | Sometimes Gluten Free | A cereal food often made with wheat-based ingredients. | |
| 34 | Soup | Sometimes Gluten Free | Pay special attention to cream-based soups, which have flour as a thickener. Many contain barley. | |
| 35 | Marinade | Sometimes Gluten Free | May contain malt vinegar, soy sauce, flour. | |
| 36 | Pretzel | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 37 | Beer | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 38 | Cracker | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 39 | Triticale | Never Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 40 | Orzo | Sometimes Gluten Free | A form of short-cut pasta. Often made with wheat-based ingredients. | |
| 41 | Couscous | Sometimes Gluten Free | Made from granules of durum wheat, so it is not gluten-free. | |
| 42 | Noodle | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 43 | Wafer | Sometimes Gluten Free | May contain gluten. Must be verified by checking the label or by contacting the manufacturer. | |
| 44 | Brownie | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 45 | Roll | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 46 | Kamut | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 47 | Ravioli | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 48 | Panko | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 49 | Ramen | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 50 | Farro | Never Gluten Free | Variety or derivative of wheat. Check the ingredients if gluten-free is not on the label. | |
| 51 | Multi-grain | Sometimes Gluten Free | Multi-grain foods may contain a wheat-based ingredient. | |
| 52 | Gravy | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 53 | Croissant | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 54 | Muffin | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 55 | Seitan | Never Gluten Free | Includes wheat gluten. Found in many veggie burgers and imitation meat. | |
| 56 | Matzo | Sometimes Gluten Free | A type of flatbread that often contains wheat-based ingredients. | |
| 57 | Donut | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 58 | Toast | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 58 | Seafood | Sometimes Gluten Free | Many imitation or processed seafoods include wheat-based ingredients. | |
| 59 | Flatbread | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 60 | Pita | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 61 | Gnocchi | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 62 | Cheesecake | Sometimes Gluten Free | Some recipes include wheat flour. | |
| 63 | Supplement | Sometimes Gluten Free | May contain gluten. Must be verified by checking the label or by contacting the manufacturer. | |
| 64 | Bagel | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 65 | Brewer | Never Gluten Free | Yeast used in beer making. Often contains gluten. Check ingredients if gluten-free isn't on label. | |
| 66 | Pancake | Sometimes Gluten Free | Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label. | |
| 67 | Poultry | Sometimes Gluten Free | May contain gluten if self-basting. | |