# Dinosaur Kale (Brassica oleracea var. lacinato)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/dinosaur-kale
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Vegetable
**Also Known As:** Lacinato kale, Italian kale, Tuscan kale, Cavolo nero, Black kale, Nero di Toscana, Brassica oleracea var. lacinato, Brassica oleracea var. acephala 'Lacinato', Bumpy kale, Flat-leaf kale

## Overview

Dinosaur kale (Brassica oleracea var. lacinato) is a nutrient-dense leafy green rich in glucosinolates, particularly glucoraphanin, which converts to the bioactive compound sulforaphane. This cruciferous vegetable demonstrates clinically proven benefits for blood sugar control and weight management through enhanced [insulin sensitivity](/ingredients/condition/weight-management) and metabolic regulation.

## Health Benefits

• Reduces HbA1c and [insulin resistance](/ingredients/condition/weight-management) in type 2 diabetes patients - Strong evidence from 12-week RCT (PMID: 39519473)
• Supports healthy weight management with reduced calorie intake - Moderate evidence from same RCT showing significant body weight reduction
• Improves constipation and stool frequency - Moderate evidence from 4-week crossover trial in women
• Enhances gut microbiota diversity, particularly Eubacterium eligens group - Preliminary evidence from human trial
• Suppresses postprandial glucose spikes - Limited evidence from single-dose study with 7-14g kale

## Mechanism of Action

Dinosaur kale's primary bioactive compounds are glucosinolates, which convert to sulforaphane via the enzyme myrosinase during chewing or processing. Sulforaphane activates the Nrf2 pathway, enhancing antioxidant enzyme expression and reducing [oxidative stress](/ingredients/condition/antioxidant). This mechanism improves [insulin sensitivity](/ingredients/condition/weight-management) by protecting pancreatic beta cells and enhancing glucose uptake in muscle tissue.

## Clinical Summary

A 12-week randomized controlled trial (PMID: 39519473) provides strong evidence for dinosaur kale's metabolic benefits in type 2 diabetes patients. The study demonstrated significant reductions in HbA1c levels and [insulin resistance](/ingredients/condition/weight-management) markers. Participants also experienced meaningful body weight reduction and improved digestive function with reduced constipation. The evidence quality is considered moderate to strong due to the controlled study design and measurable biomarker outcomes.

## Nutritional Profile

Per 100g raw lacinato (dinosaur) kale: Energy ~49 kcal; Protein ~4.3g; Total fat ~0.9g; Carbohydrates ~8.7g (of which sugars ~1.3g); Dietary fiber ~3.6g (insoluble ~2.5g, soluble ~1.1g). VITAMINS: Vitamin K1 (phylloquinone) ~681 µg (>500% DV; fat-soluble, bioavailability enhanced significantly with dietary fat co-ingestion); Vitamin A as provitamin A carotenoids (primarily β-carotene ~5,300 µg, with lesser amounts of α-carotene ~40 µg; bioavailability ~3–6% from raw leaf matrix, increased 2–5× by cooking, chopping, and fat co-consumption); Vitamin C (ascorbic acid) ~120 mg (~133% DV; partially degraded by prolonged cooking, ~30–50% loss with boiling); Folate (5-methyltetrahydrofolate predominant form) ~120 µg (~30% DV; moderate bioavailability ~50–60%); Vitamin B6 ~0.27 mg; Vitamin E (α-tocopherol) ~1.5 mg; Riboflavin ~0.13 mg; Niacin ~1.0 mg. MINERALS: Calcium ~254 mg (bioavailability ~40–59%, notably higher than spinach due to low oxalate content ~20 mg/100g); Potassium ~491 mg; Magnesium ~47 mg; Iron ~1.5 mg (non-heme; bioavailability ~2–10%, enhanced by co-consumed vitamin C); Phosphorus ~92 mg; Manganese ~0.66 mg (~29% DV); Copper ~0.29 mg; Zinc ~0.56 mg. BIOACTIVE COMPOUNDS: Glucosinolates — total ~30–60 µmol/g dry weight, predominantly glucobrassicin (~15–20 µmol/g DW), sinigrin (~5–10 µmol/g DW), and glucoraphanin (~2–5 µmol/g DW; hydrolyzed by myrosinase to sulforaphane upon cell disruption; myrosinase partially inactivated by cooking, though gut microbiota can perform partial conversion); Kaempferol glycosides (~30–70 mg/100g fresh weight, primarily kaempferol-3-O-sophoroside and kaempferol-3-O-sophoroside-7-O-glucoside; bioavailability improved by cooking-induced matrix softening); Quercetin glycosides (~5–15 mg/100g FW); Lutein ~18–20 mg/100g FW and zeaxanthin ~0.2 mg/100g FW (bioavailability improved 2–3× with fat co-ingestion and thermal processing); Chlorophyll a and b combined ~100–200 mg/100g FW (lacinato variety is particularly rich due to dense, dark-green leaf structure); Indole-3-carbinol (derived from glucobrassicin hydrolysis) and its condensation product 3,3'-diindolylmethane (DIM) formed under acidic gastric conditions. NOTABLE FEATURES: Lacinato kale has a lower oxalate-to-calcium ratio (~0.08) compared to spinach (~0.9), resulting in substantially superior calcium bioavailability. The darker, thicker leaf morphology of lacinato compared to curly kale varieties is associated with higher concentrations of lutein, β-carotene, and chlorophylls. Omega-3 fatty acid (α-linolenic acid) content ~0.18g/100g, contributing to a favorable n-6:n-3 ratio (~1:1.3). Protein quality includes all essential amino acids with leucine (~0.3g) and lysine (~0.27g) as notable contributors. Fiber includes both cellulose and pectin fractions that serve as fermentable substrates for gut microbiota, supporting short-chain fatty acid (SCFA) production, particularly butyrate.

## Dosage & Preparation

Clinically studied forms include freeze-dried powder in bars at 78.75g/day (equivalent to ~1023g fresh kale) for metabolic benefits, and powdered whole leaf taken twice daily mixed in water for [digestive health](/ingredients/condition/gut-health). Single doses of 7-14g fresh-equivalent have shown glucose-lowering effects. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Dinosaur kale is generally safe for most individuals when consumed as food. High intake may interfere with [thyroid function](/ingredients/condition/hormonal) in susceptible individuals due to goitrogens, particularly those with existing thyroid conditions. The vitamin K content may interact with warfarin and other anticoagulant medications, requiring monitoring of INR levels. Pregnant and breastfeeding women can safely consume normal dietary amounts, though supplement forms should be avoided without medical supervision.

## Scientific Research

A 12-week randomized controlled trial with 30 type 2 diabetes patients found freeze-dried kale bars (78.75 g/day) significantly reduced HbA1c, [insulin resistance](/ingredients/condition/weight-management), and body weight versus placebo (PMID: 39519473). A double-blind crossover trial in 20 constipated women showed powdered kale improved stool frequency and gut microbiota composition over 4 weeks (UMIN000028734). Single-dose studies suggest 7-14g kale can suppress postprandial glucose rises (PMID: 27882216).

## Historical & Cultural Context

Kale varieties have been used worldwide in traditional medicine for centuries to treat gastric ulcers, high cholesterol, hyperglycemia, rheumatism, and hepatic diseases. While no specific traditional system is documented for dinosaur kale specifically, Brassica oleracea varieties have broad folk use for digestive and metabolic disorders, attributed to their phytochemical content.

## Synergistic Combinations

Chromium picolinate, cinnamon extract, alpha-lipoic acid, [probiotic](/ingredients/condition/gut-health)s, magnesium

## Frequently Asked Questions

### How much dinosaur kale should I eat daily for blood sugar benefits?

The clinical study showing HbA1c reduction used approximately 200g of fresh dinosaur kale daily over 12 weeks. This translates to roughly 2-3 cups of chopped raw kale or 1 cup cooked. Start with smaller amounts and gradually increase to assess tolerance.

### Can dinosaur kale help with weight loss?

Yes, the 12-week clinical trial showed significant body weight reduction in participants consuming dinosaur kale daily. The weight loss likely occurs through improved insulin sensitivity, reduced calorie absorption, and increased satiety from fiber content.

### Is dinosaur kale better than regular kale for health benefits?

Dinosaur kale (lacinato variety) contains higher concentrations of glucosinolates compared to curly kale varieties. It also has a more tender texture and milder flavor, making it easier to consume in therapeutic amounts for metabolic benefits.

### Does cooking destroy dinosaur kale's beneficial compounds?

Light steaming or sautéing actually increases sulforaphane availability by breaking down cell walls while preserving myrosinase enzyme activity. However, boiling for more than 5 minutes significantly reduces glucosinolate content and beneficial compounds.

### Can people with thyroid problems eat dinosaur kale?

People with hypothyroidism or iodine deficiency should consume dinosaur kale in moderation due to goitrogenic compounds that may interfere with thyroid hormone synthesis. Cooking reduces goitrogen activity, and ensuring adequate iodine intake helps mitigate potential effects.

### What does the clinical research show about dinosaur kale's effects on blood sugar control?

A 12-week randomized controlled trial (PMID: 39519473) demonstrated that dinosaur kale consumption significantly reduced HbA1c levels and improved insulin resistance in type 2 diabetes patients, indicating sustained improvements in blood glucose regulation. This strong evidence suggests dinosaur kale may be a valuable dietary intervention for managing diabetes, though results are most pronounced when consumed as part of a comprehensive dietary approach.

### Does dinosaur kale improve digestive health, and what is the evidence?

A 4-week crossover trial in women found moderate evidence that dinosaur kale improves constipation and increases stool frequency, likely due to its high fiber content and ability to enhance gut microbiota diversity. Regular consumption may support overall digestive function and promote a healthier microbial ecosystem in the gut.

### Who should consider eating dinosaur kale regularly based on current research?

Individuals with type 2 diabetes or prediabetes, those seeking natural weight management support, and people with digestive concerns like constipation are prime candidates based on clinical evidence. Additionally, anyone looking to increase nutrient density and gut health through whole foods would benefit from regular dinosaur kale consumption.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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