As an herb best known as a flavoring for food, over the years garlic has been used as a medicine to prevent or treat a wide range of diseases and conditions. However, there are six types of people who should not eat garlic.
1. People suffering from non-bacterial diarrhea
If patients with diarrhea consume raw garlic, the spicy flavor of the garlic may stimulate the intestines which may cause intestinal mucosal hyperemia and edema aggravation, and make the condition even worse.
If the diarrhea has occurred, consumption of garlic should be careful.
2. People who have liver problems
Some people believe that garlic is an antibacterial and antiviral food and it can kill bacteria and viruses, so they are eating garlic in order to prevent hepatitis. Also, people who already have hepatitis eat garlic every day to cure it. Garlic cannot be used to treat or kill hepatitis virus.
Some elements in garlic may cause stimulation on the stomach and intestines, which may inhibit the secretion of digestive juice in intestinal tract, and affect the digestion of food, thereby aggravating many symptoms for the hepatitis patients, such as nausea.
Moreover, the exaggerated use of garlic can cause anemia because some its components decrease red blood cells and hemoglobin.
3. People with eye diseases
Patients with eye disease should try to not eat garlic, especially those with poor health. Doctors of traditional Chinese medicines believe that the regular consumption of garlic in large quantities for longer period of time would damage the eyes and the liver, but also it may trigger hypopsia, tinnitus, front heaviness, memory loss and so on.
4. People with low blood pressure
It can lower blood pressure. In theory, taking garlic might make blood pressure become too low in people with low blood pressure.
5. Pregnant women and Women breastfeeding
When taken in the amounts normally found in food, garlic is likely safe to use during pregnancy. There is not enough reliable information about the safety of using garlic on the skin if you are pregnant or breast-feeding. Hence garlic is possibly unsafe when used in medicinal amounts during pregnancy and when breast-feeding.
6. Patients before surgery
Patients who will undergo a surgery should stop taking garlic at least two weeks before a scheduled surgery because it might prolong bleeding.
Source: b.cari.com.my/forum.php?mod=viewthread&tid=948139&extra=page%3D69
