Hermetica Superfood Encyclopedia
The Short Answer
Rapeseed leaf (Brassica napus) contains bioactive phenolic compounds, particularly sinapic acid and protocatechuic acid, which demonstrate antioxidant effects through ROS scavenging and peroxynitrite inhibition pathways. These compounds exhibit anti-inflammatory, anticarcinogenic, and metabolic regulatory properties, with black-seeded varieties showing superior phenolic content and antioxidant capacity compared to yellow-seeded varieties.
CategoryLeaf & Herb
GroupLeaf/Green
Evidence LevelStrong
Primary Keywordrapeseed leaf benefits
Synergy Pairings4
Rapeseed Leaf — botanical close-up
Health Benefits
Supports cardiovascular health through its glucosinolate and flavonoid content
Enhances immune resilience via its rich vitamin C and antioxidant profile
Promotes digestive wellness by providing dietary fiber and supporting gut motility.
Regulates metabolic balance, contributing to overall systemic health
Contributes to cognitive clarity, though specific mechanisms require further study.
Strengthens bone density through its calcium and mineral content
Supports musculoskeletal vitality, aiding in overall physical well-being
Origin & History
Natural habitat
Rapeseed Leaf (Brassica napus) is a nutrient-dense botanical cultivated across Europe and Asia. While primarily known for its oil-producing seeds, the leaves are a valuable source of health-promoting compounds. It offers significant potential in functional nutrition, supporting cardiovascular health, immune resilience, and metabolic balance.
“Rapeseed Leaf has been traditionally consumed in European and Asian cuisines for centuries, valued for its cardiovascular, immune, and digestive support. It was also utilized in herbal medicine for detoxification and vitality enhancement. Modern research now validates its antioxidant, anti-inflammatory, and metabolic benefits.”Traditional Medicine
Scientific Research
Scientific studies are investigating Rapeseed Leaf for its antioxidant, anti-inflammatory, and immune-supportive properties, largely attributed to its glucosinolate and flavonoid content. Preliminary research suggests benefits for cardiovascular health and metabolic regulation. Further clinical research is needed to fully establish its therapeutic applications in human health.
Preparation & Dosage
Traditional preparation
Common Forms
Consumed cooked as a vegetable; available in powdered extract form.
Cooked Dosage
Consume 50–100 grams cooked leaves daily.
Powdered Dosage
500–1000 mg of powdered form daily, under professional guidance
Take .
Nutritional Profile
- Dietary Fiber
- Vitamins: Vitamin C
- Minerals: Calcium, Magnesium, Potassium
- Phytochemicals/Bioactives: Glucosinolates, Flavonoids (kaempferol, quercetin)
How It Works
Mechanism of Action
Sinapic acid acts as a peroxynitrite scavenger, inhibiting cellular necrosis and apoptosis pathways while demonstrating superior HOO•-scavenging activity compared to Trolox. Protocatechuic acid provides anti-inflammatory effects, while sterols and tocopherols enhance LDL resistance to peroxidation. These phenolic compounds modulate oxidative stress pathways and exhibit HDAC inhibitory activity, inducing apoptosis in cancer cells.
Clinical Evidence
Current evidence is limited to in vitro and animal studies, with no human clinical trials available for rapeseed leaf specifically. In laboratory studies, sinapic acid induced dose-dependent apoptosis up to 78.9% in cancer cell lines and reduced aberrant crypt foci development in DMH-induced colon cancer rats. Phenolic extracts demonstrated DPPH scavenging activity of 22.81–41.25% in antioxidant assays. Further human clinical research is essential to establish therapeutic applications and effective dosing protocols.
Safety & Interactions
No specific safety data, drug interactions, or contraindications have been established for rapeseed leaf in available research. Modern low-erucic acid rapeseed varieties have mitigated historical cardiac concerns associated with older cultivars, though this relates primarily to seed oil rather than leaf consumption. The high polyunsaturated fatty acid content may theoretically influence prostaglandin and thromboxane pathways, but no clinical interactions have been reported. Phenolic compounds are generally recognized as safe in food contexts, with no adverse effects noted in cited studies.
Synergy Stack
Hermetica Formulation Heuristic
Mineral cofactor
Cardio & Circulation | Immune & Inflammation
Also Known As
Brassica napus L.rape leafcolza leafcanola leafoilseed rape leaf
Frequently Asked Questions
What makes rapeseed leaf different from rapeseed oil?
Rapeseed leaf contains concentrated phenolic compounds like sinapic acid and protocatechuic acid that provide antioxidant effects, while rapeseed oil primarily contains fatty acids and tocopherols. The leaf offers unique peroxynitrite scavenging properties not found in the oil extract.
Are black or yellow rapeseed varieties more beneficial?
Black-seeded rapeseed varieties demonstrate higher phenolic content and superior antioxidant capacity compared to yellow-seeded varieties. Research shows a positive correlation between flavonoid content and antioxidant activity, with black varieties consistently outperforming yellow ones in DPPH scavenging assays.
How does sinapic acid work in rapeseed leaf?
Sinapic acid functions as a potent peroxynitrite scavenger and exhibits HOO•-scavenging activity superior to Trolox. It inhibits HDAC activity, modulates cellular necrosis and apoptosis pathways, and demonstrates anticarcinogenic effects through DNA repair mechanisms.
Is rapeseed leaf safe for regular consumption?
Current safety data for rapeseed leaf is limited, with no established contraindications or drug interactions in available research. Modern low-erucic acid varieties have addressed historical cardiac concerns, and phenolic compounds are generally safe in food contexts, though comprehensive human safety studies are lacking.
What health conditions might benefit from rapeseed leaf?
Preliminary research suggests potential benefits for cardiovascular health through LDL reduction and improved glucose tolerance, plus possible anticarcinogenic effects demonstrated in colon cancer animal models. However, human clinical trials are needed to establish therapeutic applications and effective dosing protocols.
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