Onion
Vegetable
Onion at a glance
- Category
- Vegetable
- Also called
- Nion, nion, onio
- Commonly found in
- Soups, Salads, Sauces, Curries
- Diets reviewed
- 26 diets
What is Onion?
Onions are bulbous vegetables that belong to the Allium family, which also includes garlic, leeks, and chives. They are known for their layered structure and pungent aroma, which intensifies during cooking. Onions are used worldwide in a variety of culinary applications due to their ability to add flavor to dishes. They are available in several varieties, including red, white, and yellow onions, each with unique taste profiles.
Also known as:
Diet Compatibility
Onion and its derivatives (onion powder, onion salt, etc.) are all high FODMAP. Onions are not oil soluble however, which means you can enjoy onion-infused oils.
Learn more →Onion, shallots, scallions, leeks and chives are all related to, but distinct from, garlic. Some people who avoid garlic also avoid these ingredients.
Learn more →You have chosen to avoid this ingredient.
Learn more →Onions, particularly when eaten raw, contain compounds that can relax the lower esophageal sphincter (LES), the muscle responsible for keeping stomach contents in place. When this muscle loses its tension, gastric acid can more easily reflux into the esophagus, causing the painful burning sensation of heartburn. Additionally, onions are high in fermentable fibers that may increase stomach pressure and delay digestion, further exacerbating GERD symptoms for sensitive individuals.
Learn more →This ingredient is generally considered compatible with a Alphagal diet.
Learn more →This ingredient is generally considered compatible with a Barley Free diet.
Learn more →This ingredient is generally considered compatible with a Corn Free diet.
Learn more →This ingredient is generally considered compatible with a Dairy Free diet.
Learn more →This ingredient is generally considered compatible with a Egg Free diet.
Learn more →This ingredient is generally considered compatible with a Fish Free diet.
Learn more →This ingredient is generally considered compatible with a Gluten Free diet.
Learn more →This ingredient is generally considered compatible with a Lactose Free diet.
Learn more →This ingredient is generally considered compatible with a Lupin Free diet.
Learn more →This ingredient is generally considered compatible with a Milk Free diet.
Learn more →This ingredient is generally considered compatible with a Nightshades diet.
Learn more →This ingredient is generally considered compatible with a Oat Free diet.
Learn more →This ingredient is generally considered compatible with a Peanut Free diet.
Learn more →This ingredient is generally considered compatible with a Pescatarian diet.
Learn more →This ingredient is generally considered compatible with a Rye Free diet.
Learn more →This ingredient is generally considered compatible with a Sesame Free diet.
Learn more →This ingredient is generally considered compatible with a Shell Fish Free diet.
Learn more →This ingredient is generally considered compatible with a Soy Free diet.
Learn more →This ingredient is generally considered compatible with a Tree Nut Free diet.
Learn more →This ingredient is generally considered compatible with a Vegan diet.
Learn more →This ingredient is generally considered compatible with a Vegetarian diet.
Learn more →This ingredient is generally considered compatible with a Wheat Free diet.
Learn more →Compatibility ratings are general guidelines and may vary by individual. Always consult a healthcare professional for personalized dietary advice.
Why People Avoid Onion
People often avoid onions because they are high in FODMAPs (Fermentable Oligo-, Di-, Mono-saccharides And Polyols), which are types of carbohydrates that can cause digestive discomfort in individuals with irritable bowel syndrome (IBS) or other functional gastrointestinal disorders. The consumption of onions can lead to symptoms such as bloating, gas, and abdominal pain in sensitive individuals. However, onion-infused oils can be a suitable alternative because the FODMAPs are not oil soluble and thus do not transfer into the oil.
Potential Reactions
- Bloating
- Gas
- Abdominal pain
- Diarrhea
This information is for educational purposes only and should not be considered medical advice. Individual reactions can vary. Consult a healthcare professional if you have concerns about specific ingredients.
Foods That Commonly Contain Onion
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Frequently Asked Questions
How Spoonful reviews ingredients
- Evidence-based. Diet compatibility ratings are compiled from peer-reviewed nutrition guidance, dietary association recommendations, and ingredient composition data.
- Continuously updated. Our ingredient database is refreshed as new sources and product data become available.
- Transparent uncertainty. When an ingredient's safety depends on serving size, preparation, or sub-ingredients, we mark it “caution” rather than forcing a binary answer.
- Not medical advice. Ratings are general guidance. Always consult a registered dietitian for personalized recommendations.
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