Garlic has long been celebrated for its healing properties, earning the nickname “nature’s antibiotic”
However, modern doctors—especially cardiologists—warn that even the healthiest food can become harmful if consumed in excess. The key factor is daily dosage, and the difference between benefit and risk can be critical for heart health.
Why garlic is beneficial
Garlic’s healing power comes mainly from allicin, an organic compound released when a clove is crushed or chopped. Allicin is responsible for garlic’s characteristic smell and its primary health effects.
In moderate amounts, allicin supports the cardiovascular system. It helps dilate blood vessels, improve circulation, and gently lower blood pressure. Studies also show that regular, safe consumption can reduce “bad” cholesterol and strengthen vessel walls. Additionally, garlic supports the immune system and aids digestion.
When benefit turns into danger
Doctors agree: the safe and beneficial dose is one to two cloves per day. This amount delivers all the advantages without negative side effects.
Problems arise when intake exceeds this—particularly five or more cloves daily. In high doses, allicin stops being a friend and can turn into a foe.
Heart under stress: Excessive vasodilation from large doses increases the heart’s workload, potentially causing tachycardia (fast heartbeat) and arrhythmias. Older adults and those with preexisting heart conditions are especially at risk.
Sudden blood pressure drops: Garlic can help people with hypertension, but in high amounts, it may lower pressure too sharply, causing weakness, dizziness, and even danger.
Overloading the body: Excess bioactive compounds force the body to work overtime to process and eliminate them, which can negatively affect not only the cardiovascular system but other organs as well.
The key takeaway: moderation is crucial
Cardiologists emphasize treating garlic as a potent seasoning or natural medicine, not a main dish. Its benefits appear only in small doses:
1–2 cloves per day: a natural medicine for blood vessels and a shield for immunity.
5 or more cloves: potential stress for the heart and a risk factor.
In short, garlic is truly a “double-edged food.” Whether it acts as a healer or a hazard depends entirely on the amount on your plate. Following the recommended dose turns this pungent spice into a valuable ally for disease prevention and long-term health.
