Question: what are the good effects of onion?
Answer: Packed With Nutrients. Onions are nutrient-dense, meaning they're low in calories but high in vitamins and minerals. ... 
May Benefit Heart Health. ... 
Loaded With Antioxidants. ... 
Contain Cancer-Fighting Compounds. ... 
Help Control Blood Sugar. ... 
May Boost Bone Density. ... 
Have Antibacterial Properties. ... 
May Boost Digestive Health.