Generally, no it is foods that have glycemic index that generally cause sleepiness. Larger numbers rate a food higher on the index, an onion only has 10 on the scale. Sugar rates about 100! The link in the related links will give you more information.
Ginger. Safe,natural and won't make you sleepy.
There are no substances in carrots that are known to make people sleepy. So no, carrots will not make you drowsy.
Onions and bellwethers
No
No
It does make you sleepy and to make it not sleepy you first should have some moody bread (just a little) then drink some water then go to sleep and see what happens
Approximately 1.1 onions
Yes! Large serving of salmon will make you sleepy, due to the Omega 3 content.
How is bacteria added in pickled onions
no
Yes
Smtimes