Similar things are described in Ayurveda. They are harmful physically, emotionally, mentally and spiritually.
Back in the 1980's, in his research on human brain function, Dr Robert [Bob] C. Beck, DSc. found that garlic has a detrimental effect on the brain. He found that in fact garlic is toxic to humans because its sulphone hydroxyl ions penetrate the blood-brain barrier and are poisonous to brain cells.
It is widely accepted among health care professionals that, as well as killing harmful bacteria, garlic also destroys beneficial bacteria, which are essential to the proper functioning of the digestive system.
Reiki practitioners explain that garlic and onions are among the first substances to be expelled from a person’s system – along with tobacco, alcohol and pharmaceutical medications. This makes it apparent that alliaceous plants have a negative effect on the human body and should be avoided for health reasons.
Homeopathic medicine comes to the same conclusion when it recognizes that red onion produces a dry cough, watery eyes, sneezing, runny nose and other familiar cold-related symptoms when consumed.