Why My Grandmother Always Puts a Nail in the Onion – A Surprising Old Trick!

✅ Helps increase iron absorption in your diet
✅ Traditionally used to combat iron deficiency & anemia

💡 In some cultures, iron-infused onions were added to  soups or broths to naturally boost iron levels!

2. Improves Soil & Boosts Plant Growth 🌱

Onion soup

✅ Onions absorb iron from the rusty nail, making them more nutrient-rich
✅ If you plant the onion, the iron in the soil helps strengthen  plants & deter pests
✅ Helps prevent yellowing leaves caused by iron deficiency in soil