The onion is related to leeks, chives, and garlic (Allium genus), and similarly has medicinal properties.
Freshest in March and April.
For tearless cooking, place onions in the fridge before chopping, and put on a fan to blow away odours
Do you suffer after eating onions? If you do, consider buying green onions or leeks instead and use the green parts only - these are lower in FODMAPs but still full of flavour. Asafoetida, an Indian spice, is also a good substitute that adds onion flavour without FODMAPs.