Definition & Meaning of "an onion a day keeps everyone away"in English

What is the origin of the proverb "an onion a day keeps everyone away" and when to use it?

The origin of the proverb "an onion a day keeps everyone away" plays on the idea that the strong, overpowering odor of onions can make people avoid someone who regularly consumes them. While this saying is not widely attributed to a specific source, it is a humorous variation of the more common "an apple a day keeps the doctor away." The proverb exaggerates the social effects of eating onions, suggesting that their smell can be so strong that it acts as a discouragement to social interaction. It serves as a lighthearted reminder that certain foods, while healthy, can sometimes have unintended consequences when it comes to personal interactions.