Kale

Basic Information

Scientific Name: Brassica oleracea var. acephala

Plant Family: Brassicaceae

Conservation / Invasive Status: Least Concern

Geographic Range: Cultivated in Northern New England

Safety Level: Generally Safe

Harvest Season: Fall, Spring, Summer, Winter

Parts Used: Leaves, Seeds, Stems

Scientific & Botanical Information

Botanical Description

Brassica oleracea var. acephala is a biennial plant typically cultivated as an annual for its edible leaves. The varietal name “acephala” means “without a head,” distinguishing kale from its headed relatives like cabbage. The plant produces a central stem with loose, upright leaves arranged in a rosette pattern, reaching 30 to 60 cm in height at maturity. Leaves vary dramatically by cultivar: curly kale (Scots kale) bears tightly ruffled, dark green leaves; Lacinato (Tuscan or dinosaur) kale features elongated, deeply savoyed blue-green leaves; and Red Russian kale displays flat, fringed leaves with reddish-purple veins. In its second year, the plant bolts to produce racemes of yellow, four-petaled flowers characteristic of the Brassicaceae family, followed by silique seed pods.1

Geographic Distribution and Habitat

Brassica oleracea originated in the eastern Mediterranean region, with Brassica cretica (native to Greece and the Aegean Islands) identified as the closest living relative of cultivated forms, supporting this origin hypothesis. Wild perennial populations persist along limestone sea cliffs of the Atlantic coasts of Britain, France, and Spain, exploiting salt and lime tolerance in habitats with minimal competition.2

Kale was among the earliest cultivated forms of B. oleracea, with formal domestication documented by approximately 400 BCE in ancient Greece and Rome. Cultivation spread throughout northern Europe during the first millennium CE, becoming a dietary staple in Scotland, Germany, and Scandinavia where its cold tolerance made it invaluable as a winter vegetable.1

Northern New England

Kale thrives in USDA Hardiness Zones 3 through 5, making it one of the most reliable crops for Northern New England. Mature plants survive temperatures as low as -23 degrees C (-10 degrees F) with appropriate cultivar selection. For fall and winter harvest in Zones 3 to 5, seeds are sown from late July through mid-August, approximately 75 days before expected maturity. Cold-hardy varieties recommended for the region include Winterbor (exceptional frost resistance), Red Russian (sweetens markedly after frost), and Siberian (extreme hardiness with mild flavor).3

Active Compounds

Kale possesses an exceptionally dense phytochemical profile spanning multiple compound classes. Glucosinolates are the signature bioactive compounds of the Brassicaceae, with kale containing sinigrin, glucobrassicin, gluconapin, gluconasturtiin, and glucoraphanin at concentrations ranging from 2.25 to 93.90 micromol per gram dry weight depending on cultivar, growing conditions, and phenological stage. Upon tissue damage, the enzyme myrosinase hydrolyzes glucosinolates into biologically active isothiocyanates, including sulforaphane from glucoraphanin.4

The carotenoid profile is dominated by lutein, present at the highest concentration of any commonly consumed vegetable, alongside zeaxanthin and beta-carotene (approximately 6.40 mg per 100 g fresh weight). Flavonoid content is substantial, with kaempferol (58 mg per 100 g) and quercetin (44 mg per 100 g) as the primary flavonols, accompanied by isorhamnetin and numerous glycosylated derivatives. Hydroxycinnamic acids including ferulic, sinapic, caffeic, and p-coumaric acids contribute to total polyphenol content of 359 to 385 mg per 100 g fresh weight.5

Kale is an exceptional source of vitamin K (phylloquinone), vitamin C (62 mg per 100 g raw), and provitamin A carotenoids. It provides highly bioavailable calcium (102 mg per 100 g) due to its unusually low oxalate content, along with meaningful amounts of iron, potassium, magnesium, and manganese. Dietary fiber content is approximately 8.4 g per 100 g, and alpha-linolenic acid (an omega-3 fatty acid) is present at 121 to 134 mg per cup.6

Pharmacological Actions

Antioxidant activity. Kale demonstrates potent free radical scavenging capacity across multiple assays (DPPH, ABTS, FRAP), with a Trolox Equivalent Antioxidant Capacity of 1175 micromol per 100 g. Glucosinolate-derived isothiocyanates activate the Nrf2 signaling pathway, upregulating endogenous phase II detoxifying enzymes including superoxide dismutase, catalase, and glutathione peroxidase.46

Anti-inflammatory activity. Quercetin and kaempferol act as potent inhibitors of pro-inflammatory mediators. Vitamin K regulates inflammatory signaling, and alpha-linolenic acid suppresses pro-inflammatory cytokine production. Animal studies demonstrate that kale administration attenuates systemic inflammation and beneficially modulates gut microbial composition in diet-induced obesity models.56

Anticancer and chemopreventive activity. Sulforaphane and other isothiocyanates selectively target precancerous and malignant cells through multiple mechanisms: inhibition of carcinogen activation, enhanced carcinogen detoxification, induction of apoptosis, and suppression of tumor angiogenesis. Indole-3-carbinol and its condensation product diindolylmethane, generated from glucobrassicin during digestion, induce G1 cell cycle arrest in breast cancer cells and modulate estrogen metabolism toward less carcinogenic pathways. Epidemiological evidence associates regular cruciferous vegetable consumption with substantially reduced risk of pancreatic, breast, colon, and esophageal cancers.78

Cardiovascular and hypocholesterolemic effects. A clinical study of hypercholesterolemic men consuming kale juice for 12 weeks demonstrated a 27 percent increase in HDL cholesterol, a 10 percent reduction in LDL cholesterol, and a 52 percent improvement in the HDL-to-LDL ratio. Kaempferol and quercetin interact with fatty acid-binding proteins to reduce cholesterol absorption, while isothiocyanates enhance cholesterol catabolism to bile acids. Supplementation with 14 g daily of powdered kale for 8 weeks reduced LDL cholesterol, blood pressure, abdominal fat, and fasting blood glucose in subjects with metabolic syndrome.9

Hepatoprotective effects. Kaempferol demonstrates broad hepatoprotective activity, while isothiocyanates regulate cellular detoxification pathways through phase I, II, and III enzyme upregulation. Indole compounds derived from cruciferous vegetables decrease fat accumulation and inflammation in non-alcoholic fatty liver disease models.68

Neuroprotective effects. A prospective study of 960 participants aged 58 to 99 years found that those consuming the most green leafy vegetables (median 1.3 servings per day) exhibited a rate of cognitive decline equivalent to being 11 years younger compared to the lowest consumers over a mean follow-up of 4.7 years. Lutein, phylloquinone, folate, and kaempferol were identified as the nutrient contributors most strongly associated with this neuroprotective effect.10

Safety and Interactions

Goitrogen concerns. Kale contains glucosinolates that can degrade to goitrin and thiocyanates, compounds that theoretically inhibit iodine transport and thyroglobulin synthesis. However, commercial kale contains less than 10 micromol goitrin per 100 g serving, classified as minimal thyroid risk. Negative thyroid effects are most pronounced in iodine-deficient individuals; with adequate dietary iodine intake, kale consumption poses negligible thyroid risk. Cooking reduces goitrin content but also diminishes beneficial isothiocyanate levels.11

Vitamin K and anticoagulant therapy. Kale is exceptionally rich in vitamin K (phylloquinone), which promotes blood clotting. For patients taking warfarin or other vitamin K antagonists, consistency of intake is more important than avoidance. Large fluctuations in vitamin K consumption alter the International Normalized Ratio, affecting anticoagulant efficacy. Patients should maintain consistent kale intake and inform their healthcare provider so warfarin dosing can be calibrated appropriately.6

Oxalate content. Kale has remarkably low oxalate content at 17 mg per 100 g (approximately 2 mg per cup raw), compared to spinach which exceeds 500 mg per 100 g. This low oxalate level means calcium bioavailability from kale is high and kidney stone risk is minimal, even for susceptible individuals.6

The Botanical Safety Handbook classifies Brassica oleracea as Safety Class 1 (herbs that can be safely consumed when used appropriately).12

Growing in New England

Kale is among the most cold-tolerant vegetables available to Northern New England gardeners. It performs as a cool-season crop with optimal growth at 13 to 24 degrees C (55 to 75 degrees F), but mature plants continue producing harvestable leaves well into winter. The phenomenon of frost sweetening, in which starch molecules convert to sugars under cold stress, significantly improves flavor after the first hard frosts of October and November. Many experienced New England gardeners deliberately delay their primary harvest until after frost for this reason.3

Common pests in the region include imported cabbage worm (Pieris rapae), flea beetles (Phyllotreta spp.), and cabbage looper (Trichoplusia ni). Organic controls include Bacillus thuringiensis (Bt), floating row covers for young plants, kaolin clay, and neem oil. Diseases to watch for include downy mildew, bacterial leaf spot, and Alternaria leaf spot, all favored by the humid conditions common to the region. Adding lime to acidic New England soils (targeting pH 6.5 to 7.5) improves both flavor and mineral availability.3

Folk Wisdom

The traditional New England gardening wisdom that “kale tastes better after a frost” has been validated by plant physiology research. Cold-acclimation triggers the conversion of stored starches to soluble sugars as a cryoprotective mechanism, measurably increasing sweetness and reducing bitterness in frost-exposed leaves.3

Pharmacological Actions: Anti-inflammatory, Antioxidant, Antitumor, Hepatoprotective, Immunomodulatory, Neuroprotective

Traditional Herbalism Information

Energetics and Actions

In Western herbal energetics, kale occupies a nuanced position. Raw kale is cooling and slightly drying, with a predominantly bitter and mildly sweet flavor profile. Cooked kale shifts toward warming, becoming more sweet and nourishing. This dual nature reflects the plant’s versatility as both a bitter digestive stimulant and a nutritive tonic. The bitter compounds, principally glucosinolates, increase digestive secretions and improve assimilation, while the sweet element nourishes and tonifies depleted tissue.13

Primary herbal actions include: nutritive tonic, bitter alterative, anti-inflammatory, mild expectorant, vulnerary (topical), carminative, and hepatic. The combination of bitter and sweet flavors working in concert is a hallmark of foods that function simultaneously as nourishment and medicine.14

Parts Used and Their Applications

Leaves are the primary medicinal part, used fresh as juice for acute digestive inflammation, cooked as nutritive food-as-medicine, applied topically as poultice for wounds and inflammation, and dried and powdered for addition to medicinal preparations. Stems are included in decoctions and mineral-rich broths. Seeds are not commonly used medicinally but are saved for cultivation.1415

Traditional Uses

Digestive support. Fresh kale juice, taken in doses of two to three glasses between meals, is a traditional remedy for peptic ulcers, gastritis, and heartburn. The juice contains S-methylmethionine (sometimes called vitamin U), which protects the gastric mucosa. Culpeper wrote of colewort that when “boiled gently in broth, and eaten, do open the body, but the second decoction doth bind the body,” demonstrating the long-recognized bidirectional effect on digestion depending on preparation method.1315

Anti-inflammatory and tissue repair. Crushed fresh leaves are applied as poultices for hot, swollen joints, bruises, contusions, burns, boils, and sores. The activation of isothiocyanates through tissue damage aligns with the traditional instruction to crush leaves “until juices begin to appear” before applying. Culpeper recommended colewort for consumption (wasting diseases), noting that “the often eating of them well boiled, helps those that are entering into a consumption.”1315

Nutritive tonic. Kale is regarded as one of the most concentrated plant sources of bioavailable nutrition, providing exceptional levels of vitamins K, A, and C alongside calcium, iron, and omega-3 fatty acids. Susun Weed emphasizes that all cabbage family plants help prevent cancer and that carotene-rich foods like kale defend against radiation damage.16

Liver support. The bitter principles in kale stimulate bile flow and support hepatic detoxification. Traditional herbalism uses kale and other brassicas as tonics for liver stagnation, addressing associated symptoms of lethargy, irritability, and headaches. Culpeper wrote that colewort “boiled twice, an old cock boiled in the broth and drank, it helps the pains and the obstructions of the liver and spleen.”1315

Respiratory support. Decoctions made into syrup have been used for coughs, bronchitis, and asthma. Culpeper noted that “the pulp of the middle ribs of Coleworts boiled in almond milk, and made up into an electuary with honey, being taken often, is very profitable for those that are puffy and short winded.”13

Eye health. With the highest lutein concentration of any commonly consumed vegetable, kale has become central to modern herbal protocols for supporting macular health and protecting against age-related vision loss.16

Lactation support. Fresh cabbage and kale leaf application directly to breast tissue is a well-established folk remedy for engorgement, used by midwives for generations. Contemporary evidence supports its anti-inflammatory action for pain relief.15

Preparations and Dosage

Fresh juice: Two to three glasses between meals for peptic ulcers, gastritis, and acute digestive inflammation. May be lightly salted following the traditional Russian method for chronic constipation (half a glass before meals).15

Decoction: Simmer leaves for 10 or more minutes in water to extract minerals and bitter principles. One to three cups daily for digestive complaints, liver support, and general tonic use. Can be prepared as syrup with honey for respiratory complaints.1315

Poultice: Soak fresh leaves in hot water until wilted, remove ribs, gently crush until juices appear, and apply warm to the affected area. Replace with fresh poultice one to two times daily. Used for bruises, swelling, wounds, burns, joint inflammation, and breast engorgement.15

Food-as-medicine: One to two cups of lightly cooked kale daily as a long-term nutritive tonic. Steaming or brief sauteing preserves nutrients while improving digestibility and bioavailability over raw consumption.14

Fermented: Salt kale at 2 to 3 percent by weight, pack tightly in jars, and ferment 3 to 14 days at room temperature. Fermentation increases accessibility of glucosinolates, reduces antinutritional factors, generates beneficial probiotics, and enhances B vitamin content. One to two tablespoons with meals for digestive support.17

Infused oil (topical): Macerate dried leaves in olive oil for 2 to 4 weeks, strain, and apply directly to skin for wounds, inflammation, and joint pain.15

Modern Adaptations

Kale has been embraced by clinical nutrition and modern herbalism as a cornerstone food-as-medicine. Green powder supplements (1 to 2 teaspoons daily) provide standardized dosing for patients unable to consume fresh kale regularly. Freeze-dried forms preserve heat-sensitive phytochemicals. Juicing protocols, often combining kale with carrot, celery, and ginger, are increasingly recommended in naturopathic and clinical herbalism settings for concentrated therapeutic delivery. Kale chips seasoned with medicinal spices like turmeric and black pepper serve as a palatable medicine delivery system that improves patient compliance.1417

New England Specific

Kale holds a place of particular importance in New England’s agricultural and medicinal heritage. As one of the few vegetables reliably harvestable through autumn and into winter in Zones 3 to 5, it served as a critical source of nutrition during the “hunger gap,” the lean period from late winter through early spring when stored vegetables were depleted and new crops were not yet mature. Root cellars maintaining cool temperatures and high humidity preserved kale alongside other brassicas through the coldest months.18

The frost-sweetening tradition is deeply embedded in New England garden culture. Experienced growers deliberately delay harvest until after the first hard frosts of October, when cold-acclimation converts starches to sugars, dramatically improving flavor. This practice transforms kale from a sometimes-bitter green into a sweet, rich-flavored winter staple. Russian kale varieties, introduced to North America by Russian traders in the 19th century, are particularly prized for their post-frost sweetness and rapid spring regrowth.18

Contemporary New England farmers and herbalists are reviving traditional year-round kale production using cold frames and low tunnels, responding to growing interest in local, seasonal, and heritage food systems. Maine in particular recognizes kale as a cornerstone crop for fall and winter harvest.18

Sourcing and Ethics

Kale is easily grown organically with minimal pest pressure. For medicinal use, organic cultivation is preferred to avoid pesticide residues that may concentrate in leaf tissue. Brassicas can accumulate heavy metals from contaminated soils, so sourcing from clean, tested growing sites matters for therapeutic preparations. Soil pH should be maintained at 6.5 to 7.5 to prevent clubroot and optimize mineral availability.18

As a biennial, kale requires 10 to 12 weeks of cold exposure below 10 degrees C before flowering and setting seed, making seed saving feasible for Northern New England gardeners whose plants naturally overwinter. Heritage and heirloom varieties, including Lacinato (dating to 18th-century Italy) and traditional Scots curly types, are available through organizations like Seed Savers Exchange. All Brassica oleracea forms are cross-compatible, so isolation distances of 1500 feet or more are needed between varieties grown for seed.18

Folk Wisdom

The traditional kitchen wisdom of making a broth from kale stems and leaves as a restorative for the weak or recovering has persisted across European cultures for centuries. In Russia, salted kale and cabbage juice before meals was grandmother’s standard remedy for sluggish digestion. Culpeper’s observation that the first decoction opens the body while the second binds it reflects a sophisticated empirical understanding of how preparation method determines therapeutic effect, wisdom passed through generations of kitchen herbalists long before modern phytochemistry could explain the mechanism.1315

Traditional Uses: Anti-inflammatory, Digestive Support, Liver Support, Respiratory Support, Tonic, Vulnerary, Wound Healing

Magical Correspondences Information

Planetary Rulers and Elemental Association

Kale is ruled by the Moon and aligned with the element of Water. Its gender is feminine. This attribution is consistent across multiple magical correspondences systems, placing kale alongside other Moon-ruled plants such as vervain, jasmine, lemon balm, and willow. The lunar association reflects kale’s connection to nourishment, intuition, emotional sustenance, and the cyclical rhythms of growth and harvest.1920

Magical Intentions and Uses

Kale’s primary magical associations center on prosperity, protection, fertility, and grounding. As a plant of abundance and sustenance, kale is traditionally used in spells and workings related to material security, household luck, and nourishment of both body and spirit. Cabbage and kale planted in a household garden, particularly immediately after a marriage or handfasting, are believed to invite good fortune and domestic prosperity. The layered structure of kale leaves symbolizes accumulated wealth and layered growth. Eating kale before divination sessions is recommended to increase mental clarity and psychic receptivity.2021

Color correspondences across kale varieties expand its magical range: green varieties for prosperity and growth, purple and red varieties for power and love magic, and pale varieties for spiritual wholeness and purification.21

Deity Associations

Kale connects to agricultural and hearth deities across multiple pantheons. Demeter (Greek) and Ceres (Roman), as goddesses presiding over harvest, fertility, and vegetation of all kinds, hold natural dominion over cultivated brassicas. Brigid (Celtic), as patroness of hearth, home, and sustenance, is associated with kitchen garden plants that sustain the household through winter. Kale’s deep connection to kitchen witchcraft and household nourishment magic aligns it with hearth deity traditions across European cultures.2022

Ritual and Spellwork Applications

Kale is fundamentally a plant of kitchen witchcraft and hearth magic. The act of preparing kale with conscious intention, projecting prayers and purposes for healing, prosperity, or protection into the food, is itself a magical working. This aligns with the kitchen witch principle that cooking with intention carries the same power as formal spellwork.21

Practical applications include incorporating kale into prosperity soups and broths prepared on the waxing moon, using fresh kale leaves as altar offerings during harvest celebrations, adding kale to ritual meals at Samhain and Mabon, and including kale in kitchen altar arrangements to invoke household abundance and protection. Kale can also be used in cleansing rituals to clear blocks to prosperity and invite the flow of resources.2021

Traditional Lore and Folk Magic

The most thoroughly documented magical tradition involving kale is the Scottish Halloween kale-pulling divination, immortalized by Robert Burns in his 1785 poem “Halloween.” On Samhain night, young people would venture into the kale fields, often blindfolded and walking backward, to pull the first stalk they encountered. The characteristics of the stalk revealed the nature of one’s future spouse: a straight or crooked stalk indicated the partner’s physique, the size of the stalk foretold their stature, soil clinging to the roots predicted their wealth, and the taste of the stem revealed their temperament. The stalks were then hung above doorways and matched against the names of subsequent visitors for further divination. First clear documentation of this practice appears in a 1769 travelogue, though it was likely much older.2324

The kailyard tradition in Scottish culture extended far beyond the physical kitchen garden. The kailyard, literally a plot where kale and vegetables were grown, represented household prosperity and domestic order from the Middle Ages onward. A thriving kailyard was considered a sign of a well-ordered, fortunate household, while a neglected one portended decline. The term later gave its name to an entire school of Scottish literature (1880 to 1914) that celebrated rural domestic life.24

In ancient Rome, cabbage was ascribed protective properties and used in rituals to ward off evil spirits. Northern German tradition maintains the Kohlfahrt (kale trip), a winter communal ritual of hiking through the countryside before gathering to share kale meals with bacon and Kohlwurst (kale sausage), blending community bonding with the nourishing, protective energy of the plant.22

Timing

Kale magic is most potent during the waxing moon for prosperity and abundance workings, and at the full moon for divination and protective magic. The harvest full moon (closest to the autumnal equinox) is an especially powerful time for kale-related rituals. Samhain (October 31) is the traditional peak for kale divination, when the thinned veil between worlds enhances prophetic work. Monday, the day of the Moon, is the ideal weekday for magical workings with this lunar plant. The autumn and early winter months, when kale is at its sweetest and most abundant, represent the natural seasonal peak for all kale magic.2025

Working with Kale in Practice

Kale is one of the most accessible plants for practical kitchen witchcraft. Prepare kale dishes with conscious intention-setting for prosperity, health, or protection. Cook kale soups on the full moon to amplify lunar energy. Use kale in prosperity meal rituals: as you tear the leaves, name what you wish to release; as you nourish the dish, name what you wish to grow. Place fresh kale on kitchen altars as offerings of gratitude for sustenance. Grow kale in your own garden (your modern kailyard) to anchor household luck and abundance, harvesting with thanks.2021

Combining with Other Plants

For prosperity workings, pair kale with basil and mint (both prosperity herbs). For protection, combine with other Moon and Water plants such as gardenia, lemon, or willow. For divination (especially at Samhain), pair with mugwort, the premier divination herb. For grounding and stability, combine with root vegetables like turnip and potato, which share kale’s earthy, sustaining energy. Other brassicas, particularly Brussels sprouts (stability and endurance), amplify kale’s magical properties through botanical sympathy.20

Cautions for Magical Use

The Scottish kale-pulling divination, while rich in tradition, historically carried social risk: an unimpressive stalk could invite teasing or gossip about one’s romantic prospects. Modern practitioners should approach this divination with sensitivity and consent. Burns himself documented the practice with both reverence and humor, suggesting it was always a blend of serious prophecy and communal entertainment. No toxic or dangerous magical warnings are associated with kale; it is considered a thoroughly safe plant for magical work.2324

Folk Wisdom

The Scottish folk belief that a thriving kailyard indicates a fortunate household persisted for centuries and reflects a practical truth: families who maintained productive kitchen gardens were more self-sufficient, better nourished, and more resilient. The Samhain kale-pulling ritual, where the earth clinging to a pulled stalk’s roots predicted a future spouse’s wealth, reveals how deeply the folk imagination linked fertile soil, healthy plants, and human prosperity. The tradition of planting kale immediately after a wedding to ensure household luck encodes the wisdom that a new family’s fortune begins with tending the ground that will sustain them.2324

Planetary Rulers: Moon

Magical Intentions: Divination, Fertility, Grounding, Prosperity, Protection

Elemental Associations: Water

  1. Cartea, M. E., & Velasco, P. (2008). Glucosinolates in Brassica foods: bioavailability in food and significance for human health. Phytochemistry Reviews, 7(2), 213-229.
  2. Maggioni, L., von Bothmer, R., Poulsen, G., & Branca, F. (2010). Origin and domestication of cole crops (Brassica oleracea L.): linguistic and literary considerations. Economic Botany, 64(2), 109-123.
  3. University of Maine Cooperative Extension. (2023). Growing Kale. Bulletin #2077. University of Maine.
  4. Verkerk, R., Schreiner, M., Krumbein, A., Ciska, E., Holst, B., Rowland, I., De Schrijver, R., Hansen, M., Gerhauser, C., Mithen, R., & Dekker, M. (2009). Glucosinolates in Brassica vegetables: the influence of the food supply chain on intake, bioavailability and human health. Molecular Nutrition & Food Research, 53(S2), S219-S265.
  5. Olsen, H., Aaby, K., & Borge, G. I. A. (2009). Characterization and quantification of flavonoids and hydroxycinnamic acids in curly kale (Brassica oleracea L. convar. acephala var. sabellica) by HPLC-DAD-ESI-MSn. Journal of Agricultural and Food Chemistry, 57(7), 2816-2825.
  6. Samec, D., Urlic, B., & Salopek-Sondi, B. (2019). Kale (Brassica oleracea var. acephala) as a superfood: review of the scientific evidence behind the statement. Critical Reviews in Food Science and Nutrition, 59(15), 2411-2422.
  7. Higdon, J. V., Delage, B., Williams, D. E., & Dashwood, R. H. (2007). Cruciferous vegetables and human cancer risk: epidemiologic evidence and mechanistic basis. Pharmacological Research, 55(3), 224-236.
  8. Abdull Razis, A. F., & Noor, N. M. (2013). Cruciferous vegetables: dietary phytochemicals for cancer prevention. Asian Pacific Journal of Cancer Prevention, 14(3), 1565-1570.
  9. Kim, S. Y., Yoon, S., Kwon, S. M., Park, K. S., & Lee-Kim, Y. C. (2008). Kale juice improves coronary artery disease risk factors in hypercholesterolemic men. Biomedical and Environmental Sciences, 21(2), 91-97.
  10. Morris, M. C., Wang, Y., Barnes, L. L., Bennett, D. A., Dawson-Hughes, B., & Booth, S. L. (2018). Nutrients and bioactives in green leafy vegetables and cognitive decline: prospective study. Neurology, 90(3), e214-e222.
  11. Felker, P., Bunch, R., & Leung, A. M. (2016). Concentrations of thiocyanate and goitrin in human plasma, their precursor concentrations in Brassica vegetables, and associated potential risk for hypothyroidism. Nutrition Reviews, 74(4), 248-258.
  12. Gardner, Z., & McGuffin, M. (Eds.). (2013). American Herbal Products Association’s Botanical Safety Handbook (2nd ed.). CRC Press.
  13. Culpeper, N. (1653). Culpeper’s Complete Herbal. Various modern editions. Cabbages and Coleworts entry.
  14. Hoffmann, D. (2003). Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press.
  15. Grieve, M. (1931). A Modern Herbal. Dover Publications (1971 reprint). Cabbage entry.
  16. Weed, S. (1989). Healing Wise. Ash Tree Publishing. Brassicaceae family discussion.
  17. Patra, J. K., Das, G., Paramithiotis, S., & Shin, H. S. (2016). Kimchi and other widely consumed traditional fermented foods of Korea: a review. Frontiers in Microbiology, 7, 1493.
  18. Coleman, E. (2009). The Winter Harvest Handbook. Chelsea Green Publishing.
  19. Cunningham, S. (1985). Cunningham’s Encyclopedia of Magical Herbs. Llewellyn Publications. Cabbage entry.
  20. Beyerl, P. (1984). The Master Book of Herbalism. Phoenix Publishing.
  21. Moura, K. (2019). Kitchen Witchcraft: Recipes, Spells, and Magic for the Hearth. Moon Books.
  22. Folkard, R. (1884). Plant Lore, Legends, and Lyrics. London: Sampson Low, Marston, Searle, and Rivington.
  23. Burns, R. (1786). Halloween. In Poems, Chiefly in the Scottish Dialect. John Wilson.
  24. McNeill, F. M. (1957). The Silver Bough (Vol. 3: A Calendar of Scottish National Festivals). William Maclellan.
  25. Dugan, E. (2012). Garden Witch’s Herbal: Green Magick, Herbalism, and Spirituality. Llewellyn Publications.