What are the disadvantages of garlic?

The Downside of Garlic: When a Superfood Has a Dark Side

Garlic is celebrated for its bold flavor and potential health perks, from fighting infections to supporting heart health. But like any potent ingredient, it’s not without its drawbacks—especially when consumed in large amounts or in raw form.

One of the most well-known downsides? Unavoidable odor. Garlic’s sulfur compounds linger not just on your breath, but often on your skin too, leading to what some affectionately (or not-so-affectionately) call “garlic body.” It’s a trade-off many accept, but not everyone finds it worth it.

Then there’s digestion. Heartburn and stomach upset are common, particularly when garlic is eaten raw. Because raw cloves are more pungent and irritating to the gastrointestinal tract, sensitive individuals may experience bloating, gas, or even nausea after a garlic-heavy meal.

Some people take it a step further with supplements—garlic pills marketed for immune or cardiovascular benefits. But here’s the catch: concentrated garlic can increase the risk of bleeding, especially if you're on blood thinners or have upcoming surgery. That’s why doctors often suggest stopping garlic supplements at least a week before a procedure.

And while rare, allergic reactions to garlic do happen. Symptoms can range from skin rashes and headaches to, in extreme cases, difficulty breathing. If you notice discomfort after eating garlic, it’s worth discussing with a healthcare provider.

Still, for most, garlic remains a safe and flavorful staple. The key is moderation. Whether you’re roasting cloves or swallowing pills, understanding the potential side effects helps you enjoy garlic’s benefits—without the unwanted aftermath.