A hardy, cool-season leafy green of the cabbage family, prized for its broad, smooth, blue-green leaves that withstand long braising.
CategoryVegetables
Scientific nameBrassica oleracea var. viridis
OriginEastern Mediterranean and Asia Minor
History & Origins
Cultivated for more than 2,000 years, collards were grown by ancient Greeks by the 4th century BCE and adopted by the Romans as a winter staple. European colonists introduced them to the Americas in the 17th century, where enslaved and later free African communities transformed slow-cooked collards with pork into a cornerstone of Southern soul food. The plant is also integral to Brazilian and Portuguese cuisines, where the related couve is used in dishes like caldo verde and feijoada.
Nutrition Facts
Per 100 g, edible portion (estimated)
- 32 kcalCalories
- 2.9 gProtein
- 0.4 gFat
- 5.7 gCarbs
- 4.1 gFiber
- 0.5 gSugars
- 213 mgPotassium
- 141 mgCalcium
- 35 mgVitamin C
- 380 mcgVitamin A
Culinary Uses
- Slow-braised with smoked ham hocks, bacon, or turkey necks
- Sautéed with garlic, olive oil, and chili flakes (Italian-style)
- Shredded into caldo verde alongside Portuguese sausage
- Stir-fried with onions, vinegar, and pepper for a quick Southern side
Known Benefits
- Exceptionally high in vitamins K, A, and C
- Good plant-based source of calcium and iron
- Contains glucosinolates linked to reduced cancer risk
Hidden Benefits
- Provides kaempferol and quercetin with anti-inflammatory effects
- Releases sulforaphane when chopped and rested before cooking
- High in folate supporting cardiovascular and prenatal health
Cautions & Considerations
- Very high vitamin K content may interact with anticoagulant medications
- Contains oxalates, which can contribute to kidney stones in susceptible individuals
- Prolonged raw consumption of large amounts may aggravate thyroid function due to goitrogens
