Onions pickled in vinegar can be consumed moderately to stimulate appetite, but if eaten in excess, it may stimulate the stomach, irritate the teeth, and cause allergies, etc.

1. Irritability

Because acetic acid is the main component of onions, eating too much pickled onions in vinegar may cause certain damage to the gastric mucosa, especially when空腹, the stomach is in a state of emptying. If pickled onions in vinegar are eaten at this time, the damage to the gastric mucosa may be exacerbated, and symptoms such as stomachache and bloating may even occur;

2. Protecting teeth

If onions pickled in vinegar are consumed for a long time, acetic acid may stimulate the enamel and other parts, making the teeth sensitive, such as feeling pain when biting hard things;

3. Allergy

After people allergic to onions or vinegar eat them, it may cause allergic reactions, such as skin rash, swelling, itching, and other adverse reactions;

4. Calcium imbalance

Since acetic acid has the effect of softening bones and removing calcium, long-term excessive consumption may lead to excessive calcium loss in the human body, especially for the elderly with low calcium content and osteoporosis, the symptoms may be more severe.

Therefore, those with weak intestines and stomach, sensitive teeth, allergies to onions or vinegar, the elderly, and others should not eat too much pickled onions in vinegar.