Garlic contains several biologically active compounds, including sulfur-containing substances that contribute to its strong smell and flavor. Researchers have studied these compounds for possible antioxidant, antimicrobial, and cardiovascular effects. However, findings from laboratory studies do not automatically mean that eating large amounts of garlic will treat a disease in humans.
For most people, garlic used in ordinary cooking can be part of a balanced diet. The situation may be different when someone consumes unusually large quantities, uses concentrated garlic supplements, or takes medication that interacts with them.
The most useful way to approach this story is to separate three questions: Is garlic nutritious? Can excessive consumption cause problems for some people? And what medical conditions can lead to kidney inflammation?
Each question requires a different kind of evidence. Understanding those differences can help readers make sensible decisions without becoming frightened by a headline or assuming that a common food is either a miracle treatment or a dangerous substance.