Doctor Sarah Marin has warned that cooking garlic whole deprives the vegetable of its main antibacterial, antifungal and antioxidant properties.
Speaking to Spanish digital newspaper El Confidencial, Marin explained that using intact garlic cloves instead of crushing or chopping them stops the plant's most beneficial health compounds from activating.
According to Marin, garlic cloves must be crushed, chopped or mashed to trigger an essential chemical reaction inside their cells. Whole cloves leave key protective substances trapped and inactive during cooking.
Inside an intact garlic clove, two essential components are stored in separate parts of the cellular structure: a compound called alliin and an enzyme named alliinase. As long as the clove remains whole, these two substances never interact with one another.
When the cell walls are broken by chopping or crushing, alliin and alliinase come into contact and react together. This reaction creates allicin, the active organosulfur compound that provides garlic's primary antibacterial, antifungal and antioxidant qualities.
Unlocking nutrients in vegetables
Garlic, known botanically as Allium sativum, is a member of the onion family that has been cultivated for more than 5,000 years across the Mediterranean, Asia and the Middle East. While garlic is prized worldwide for its distinctive aroma and culinary versatility, its therapeutic reputation relies heavily on allicin, a volatile compound that is absent until raw plant tissue is crushed.
Marin noted that garlic is not the only kitchen ingredient that requires mechanical disruption to release its nutritional benefits. She explained that broccoli undergoes a similar biological transformation when prepared for cooking.
Cutting or slicing broccoli breaks its plant tissue, triggering an enzymatic process that releases sulforaphane. Sulforaphane is a natural compound recognized by researchers for its potential anti-cancer properties.
Broccoli belongs to the brassica family of cruciferous vegetables, which also includes cabbage, kale and Brussels sprouts. Like garlic, these vegetables contain precursor compounds that convert into active health-promoting nutrients only after the plant cells are cut or chewed.
Seasonal nutrition recommendations
El Confidencial is a digital newspaper based in Madrid that reports on national news, business, health and lifestyle developments across Spain. Marin emphasized to the outlet that simple adjustments in daily food preparation can significantly alter how much nutrition the body receives from common ingredients.
In related seasonal health advice published by the outlet, immunologist Jenna Macciochi shared recommendations for accessible foods to support immune wellness during the autumn months.
Macciochi advised eating natural plain yogurt in the morning as weather turns cooler. Natural yogurt is produced by fermenting milk with beneficial bacteria, providing live probiotic cultures that support digestive health and gut immunity as seasonal temperatures drop.
