RED ONIONS (Allium cepa L.)
Premium Red Onions are distinguished by their deep purple-red skin and layered flesh ranging from magenta to white. They are the most antioxidant-rich onion variety, containing high levels of anthocyanins (the same pigments found in berries and red wine) and quercetin, making them both nutritionally superior and visually striking.
Red onions offer a more robust, slightly peppery flavor compared to white onions, with a crisp texture that holds up well in raw applications.
In Nigerian cuisine, red onions are preferred for dishes requiring bold flavor and color, such as Ofe Akwu (banga soup), Efo Riro , and fresh salads. Their high anthocyanin content provides cardio-protective benefits and potential cancer risk reduction properties.
Nutritional Components (Per 100g raw red onion)
Energy: 40-44 kcal
Protein: 1.0-1.3g
Fat: 0g
Carbohydrates: 9-10g
Dietary Fiber: 1.8-2.0g
Sugars: 4-5g
Vitamin C: 8-12mg
Vitamin A: Trace
Folate (B9): 19-25µg
Potassium: 150-175mg
Phosphorus: 25-35mg
Quercetin: Higher
Anthocyanins: 10-50mg
Total Phenols: Higher
Antioxidant Capacity: Superior
Key Benefits: Highest antioxidant capacity among onion varieties due to anthocyanins and quercetin. Cardio-protective effects may reduce heart disease risk. Potential cancer risk reduction properties. Anti-inflammatory effects help combat chronic diseases. Higher vitamin C content supports immune function. Greater diversity of flavonoid compounds compared to white and yellow onions. Rich in ferulic acid, chlorogenic acid, and other phenolic acids with health-promoting properties.
Storage Instructions
Store in a cool, dry, well-ventilated place away from heat and light
Shelf life: 2-4 months when properly stored (slightly longer than white onions due to higher antioxidant content)
Temperature: 0-4°C (refrigerator) optimal; room temperature (15-20°C) acceptable for 2-3 weeks
Light protection: Keep in dark place—light degrades anthocyanins (red pigments)
Humidity: Low humidity (60-65%) preferred to prevent mold while maintaining firmness
Ventilation: Essential—never store in sealed plastic; use mesh or paper bags
Separation: Store away from potatoes and ethylene-producing fruits
Pre-cut storage: Refrigerate in airtight containers; use within 7-10 days (color may bleed)
Signs of spoilage: Softening, dark spots, mold, or strong fermenting odor
Freezing: Slice and freeze for up to 8 months; suitable for cooked applications only
