Not if they have been handled properly and have not been contaminated.
NO.
fleas bit rats that had poisonous blood and then bit humans humans traveled by ships (trading) spreading it then people left their towns going to others spreading it so on
sam grew his onions up on the big thumb.
She eats night lock ( Poisonous berries) That Peeta had left a handful on his jacket because he thought they were normal berries.
No
No onions will not turn any stock sour. A stock can turn sour if left at room temperature for around 24 hours with or without onions.
Some plants from the family Solanaceae are usually not eaten by any animal for their toxicity which can range from mildly irritating to deadly. Some plants in this family are the deadly nighshade, datura, and the angel's trumpet. Other plants from this family that are not harmful: eggplants, potatoes, tomatoes, and capsicum. (potatoes if left in the sunlight for too long can be poisonous, and tomato vines and leaves are poisonous.) All parts of Brugmansia genus of plants are dangerous to animals and humans. If ingested this plant may cause death. Others that are dangerous to most herbivores (and are not usually eaten by them): garlic, onions, wolfsbane, castor oil plant, daphne (berries), hemlock, poison ivy, arum lily, and white snakeroot. Plants that are poisonous to some animals may not be poisonous to others.
Only if they have been mishandled.
In "Too Soon a Woman," Mary reflects on her past choices as she sits up all night waiting to find out if the mushroom she ate was poisonous. She contemplates her life and regrets not living more fully. As she faces the possibility of death, she yearns to make the most of the time she has left.
They start sprouting.
Pickled onions are coated in vinegar and left to pickle. Too much vinegar can cause a stomach ulcer. Nobody wants a stomach ulcer.
Average onions are about 100 grams each, so you can expect a 2 pound bag (1 kilo) to contain about 10 onions. Note that this varies with the type of onion (red and white onions are slightly larger a piece) and whether you buy organic onions which tend to be slightly smaller.
Why I Left Harry's All-Night Hamburgers was created in 1987.