2. A “Prehistoric” Shield for the Immune System
Onions have been used since ancient times for their medicinal properties. Modern doctors confirm that the high vitamin C and selenium content strengthens the immune response. The sulfur compounds provide a natural defense against certain types of harmful bacteria, much like a protective exoskeleton.
3. Digestive “Reactions” and Gut Health
Because onions are rich in prebiotics, they are excellent for promoting a healthy gut microbiome. However, for some individuals, the “answer” to why onions cause discomfort is simple: they are high in FODMAPs. This can lead to bloating or gas as gut bacteria ferment the fibers, a process that is normal but can be uncomfortable for those with sensitive digestive systems.
Instructions: How to Get the Best Results
To maximize the benefits and minimize the “side effects” of onions, follow this preparation recipe:
- Don’t Over-Peel: The outer layers of the onion contain the highest concentration of flavonoids. Try to remove only the paper-like skin to preserve the most nutrients.
- Let Them “Breathe”: After cutting an onion, let it sit for 5 to 10 minutes before cooking. This allows the beneficial sulfur compounds to fully activate, a process similar to how certain insects use chemical reactions for defense.
- Balance Raw vs. Cooked: While cooking makes onions easier on the stomach, eating them raw preserves the highest levels of heart-healthy sulfur compounds.
