Seven-top is the turnip that gave up on being a turnip to become all leaf, all medicine, all food. Black mountain families in Tennessee and the Carolinas grew these because the greens were the point all along — more greens per square foot than almost anything you could plant. Your body needs what's in these greens.
Seven-top turnip greens are a fall and winter food — planted in September, harvested through December and January in the upper South. Black families in Tennessee, Kentucky, and the Carolina Piedmont relied on these greens as the primary winter vegetable when the summer garden was long finished. The seed is still passed among gardening families in these regions, a living seed-saving tradition.
Seven-top turnip greens contain indole-3-carbinol (I3C) and sulforaphane from glucosinolate hydrolysis — compounds that upregulate Phase II detoxification enzymes in the liver. A pooled analysis of 8 cohort studies found highest cruciferous vegetable intake associated with 18% reduced all-cause mortality. Vitamin K content at 529mcg per cup addresses the deficiency that accelerates arterial calcification — directly relevant to the atherosclerosis burden in Black Americans. Calcium from cooked turnip greens is highly bioavailable (50-60% absorption rate) compared to dairy calcium (30-35%) — critical for communities with high rates of lactose intolerance. The folate supports MTHFR gene expression, which is polymorphic in Black Americans at rates associated with cardiovascular risk.
Wash thoroughly — grit settles in the leaf folds. Remove the toughest stems. Cook in a pot with a small amount of water, garlic, onion, and your seasoning of choice. Low and slow for 45 minutes produces tender, deeply flavored greens. Do not overcook past this point — you lose the glucosinolates. The pot likker is rich in folate and minerals — save it. A splash of apple cider vinegar at serving brightens the flavor and helps mineral absorption.
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