Vegetable
Collard Greens
A sturdy dark leafy green rich in calcium and vitamin K that quietly strengthens bones and blood.
⤢📊 How it ranks (our editor score) — 91/100Tap to see the breakdown
🌱 What it is
Collard greens are large, sturdy leaves from a cabbage-family plant, cooked low and slow to soften their hearty texture and bring out a mild, earthy flavor.
📜 Where it comes from
Collard greens trace back to wild cabbage varieties grown in the eastern Mediterranean and were later cultivated widely across Africa, where they became a dietary staple. Enslaved Africans brought both the plant and its cooking traditions to the American South, where collards became a cornerstone of Southern soul food cuisine. They remain treasured today for their hearty texture and nutrient density.
✨ Why it's good for you
- May help support strong bones with calcium and vitamin K
- May help support healthy blood clotting and vessel health
- May help provide iron and folate for healthy blood
- May help support healthy cholesterol levels with fiber
🥗 Nutrition
Per 1 cup chopped, cooked (190g) · about 63 calories
- Vitamin K 772mcg
- Calcium 268mg
- Vitamin A 722mcg RAE
- Fiber 5g
Source: USDA FoodData Central
🥄 How to use it
Slice the leaves into ribbons and simmer or sauté until tender. A squeeze of lemon helps your body take up the iron.
How much: A practical serving is about 1 cup cooked (or 2 cups raw) several times a week, ideally with a source of vitamin C nearby to boost iron uptake.
Why it works: Nutrition science attributes collard greens' bone-supporting reputation to their high calcium and vitamin K content, both of which are studied for their roles in bone mineralization and blood health.
Show full details & how to prepare it
Collard greens are broad, deep-green leaves from the cabbage family, and they are one of the kitchen's quiet powerhouses for bone and blood. A single cooked cup carries a generous helping of calcium plus a large amount of vitamin K... two nutrients that work hand in hand to help the body build and maintain strong bones.
The same leaves bring plant iron and folate that support healthy blood, and a good dose of soluble fiber that gently helps carry cholesterol out of the body. Pairing collards with something rich in vitamin C, like a squeeze of lemon or some tomato, helps your body absorb their iron far better.
They are a very safe, inexpensive food. The main thing to know is their high vitamin K: if you take a blood thinner such as warfarin, keep your leafy-green intake steady rather than swinging high and low, and let your doctor know.
Ways to prepare it
⚠️ Cautions
- Collards are high in vitamin K, which can interact with blood-thinning medicine like warfarin, so it helps to keep intake steady rather than swinging high and low.
- Their oxalates mean people prone to kidney stones should enjoy them in moderation.
- Very large amounts of raw cruciferous greens may affect thyroid function in sensitive people; cooking reduces this.
📚 Learn more
🌿 Deeper natural detail
🩺 The conventional view
💬 Ask Remy about Collard Greens
📚 Resource confidence
Based on mentions in health references
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