Possible digestive effects include heartburn, nausea, abdominal discomfort, gas, and diarrhea. People with sensitive digestion or reflux may notice symptoms after eating raw garlic, although tolerance varies considerably.
Garlic can also affect bleeding risk, especially when taken in large amounts or as a concentrated supplement. People who use anticoagulant or antiplatelet medication, have a bleeding disorder, or are preparing for surgery should discuss garlic supplements with a healthcare professional. Supplements may also interact with other medicines.
But does eating garlic damage the kidneys? There is no good evidence that ordinary culinary amounts of garlic routinely cause kidney inflammation in healthy people. Research into garlic-derived compounds and kidney health is ongoing, but laboratory findings and early studies cannot establish that garlic treats or prevents kidney disease.
It is equally inaccurate to assume that garlic is harmless in every circumstance. A person may experience an adverse reaction, take a supplement containing other ingredients, or have a medical condition that changes what is appropriate for them. The quality and concentration of commercial supplements can differ substantially from the amount of garlic used in food.
