Onions are a staple vegetable in many cuisines around the world, known for their pungent flavor and versatility. They come in several varieties, including yellow, red, white, and sweet onions. Onions can be used raw in salads and salsas, or cooked in soups, stews, stir-fries, and as a flavor base in many dishes.

Nutritional Content (per 100g serving, raw):

- **Calories**: 40 kcal

- **Carbohydrates**: 9.3g

  - Sugars: 4.2g

  - Dietary Fiber: 1.7g

- **Protein**: 1.1g

- **Fat**: 0.1g

- **Vitamin C**: 7.4 mg (8% DV)

- **Potassium**: 146 mg (3% DV)

- **Vitamin B6**: 0.1 mg (5% DV)

Onions are rich in antioxidants, particularly quercetin, which may have anti-inflammatory and immune-boosting properties. They also contain sulfur compounds that contribute to their strong aroma and taste, and may have beneficial effects on heart health. Additionally, onions provide small amounts of vitamins and minerals, such as vitamin C and potassium, and are low in calories.