Health Guide

scallion

Meet the scallion (also known as the green onion or spring onion), the humble yet mighty vegetable that packs a serious nutritional punch. While often treated as a garnish, scallions are actually immature onions, harvested before the bulb fully forms. They belong to the *Allium* family, alongside garlic, leeks, and chives, which are famous for their sulfur compounds that offer powerful health protection. Far more than just a colorful topping, scallions are a concentrated source of vitamins, antioxidants, and unique plant chemicals that support everything from your immune system to your heart health. Think of them as nature’s tiny, edible multivitamin.
Evidence BasedDietary Supplement
scallion
VERIFIED SOURCE

Bio-Activity Analysis

Antioxidant Density: Scallion vs. Onion

SCIENTIFIC DATA VISUALIZATION

Y-Axis
Antioxidant Units (ORAC)
Vegetable

Health Benefits & Sources

Why You Need It

  • Immune System Shield: High in Vitamin C to fight off colds.
  • Heart Health: Contains organosulfur compounds that may lower cholesterol.
  • Antioxidant Power: Rich in Quercetin to fight inflammation.
  • Bone Strength: Provides Vitamin K, essential for bone density.

Deep Dive

Scallions are nutritional overachievers. Despite their size, they are loaded with Vitamin C, a crucial antioxidant that protects your cells from damage and boosts your immune defense. They are also one of the best dietary sources of Vitamin K, a nutrient often overlooked but vital for proper blood clotting and maintaining strong bones.

The real magic, however, lies in the organosulfur compounds (like allicin) and the flavonoid Quercetin. These bioactive compounds act as nature’s detoxifiers. They help reduce oxidative stress in the body, which lowers the risk of chronic diseases like heart disease. Quercetin, specifically, acts as a natural antihistamine and anti-inflammatory agent, potentially easing allergy symptoms and protecting your blood vessels.

Natural Food Sources

Scallions are the star here, but they share the spotlight with other nutrient-dense greens.

FoodAmount% DV
Scallions (Raw)1 cup (100g)20% Vitamin C, 25% Vitamin K
Kale1 cup (raw)68% Vitamin K
Spinach1 cup (raw)121% Vitamin K
Red Bell Pepper1 cup (chopped)190% Vitamin Vitamin C

Supplementation

Scallions are best consumed as a whole food. You do not typically find "Scallion Supplements" on the shelf. However, you can find Onion Extract supplements which concentrate the quercetin and sulfur compounds.

Usage: Eating 1/2 cup of raw or lightly cooked scallions daily is sufficient to gain benefits. The green tops contain the highest concentration of vitamins compared to the white bulb.

Top Food Sources

Scallions (Green Onions)
Eat raw or lightly sautéed
Kale
Best source of Vitamin K
Red Bell Peppers
Superior source of Vitamin C
Spinach
Rich in antioxidants
Broccoli
Good source of Vitamin C and K

Frequently Asked Questions

The green tops are generally more nutritious. They contain significantly higher levels of Vitamin C and Vitamin K compared to the white bulb, though both parts offer health benefits.
Light cooking is fine, but raw scallions preserve the highest levels of Vitamin C, which is heat-sensitive. Adding them to salads or as a raw garnish maximizes this benefit.
Yes. The sulfur compounds in scallions act as natural vasodilators, helping to relax blood vessels and improve circulation, which can contribute to healthier blood pressure levels.
When cut, scallions release a sulfuric gas (syn-propanethial-S-oxide). When this gas mixes with the water in your eyes, it forms a mild sulfuric acid, triggering your tear glands to flush it out.

Safety & Side Effects

Scallions are generally very safe for most people. However, because they are high in Vitamin K, individuals taking blood thinners (like Warfarin/Coumadin) should maintain a consistent intake to avoid interfering with their medication.

Chemical Safety: Scallions contain thiosulfate, which is toxic to dogs and cats. Never feed scallions or onions to pets.

Scientific References

  • [1]National Institutes of Health (NIH) - Vitamin C Fact Sheet for Health Professionals
  • [2]Journal of Agricultural and Food Chemistry - Flavonoid Content of Scallions
  • [3]American Heart Association - Allium Vegetables and Cardiovacular Health