- Heartburn
- Stomach discomfort
- Gas
- Bloating
- Nausea
- Mouth irritation
People with sensitive digestive systems may notice these effects more strongly.
Garlic can also interact with certain medications, particularly those affecting blood clotting, so people taking prescription medications should discuss concentrated garlic supplements with their healthcare professional.
Normal culinary amounts are very different from high-dose supplements.
The Bottom Line
The claim that there are four specific types of garlic that nobody should buy regardless of price is too simplistic.
There are, however, clear reasons to reject garlic that is:
Moldy
Mushy or rotten
Unpleasantly decomposed or foul-smelling
Stored or preserved under unsafe conditions
And don’t assume that purple garlic is dangerous or that cheap garlic is inferior. Natural differences in color and price don’t determine food safety.
When shopping, focus on what you can actually observe: firmness, dryness, freshness, appearance, smell, and storage conditions.
Garlic can be a nutritious and flavorful part of a balanced diet—but like any fresh food, quality and proper handling matter far more than viral claims or price tags.