# Cold-Pressed Perilla Seed Oil (Perilla frutescens)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/cold-pressed-perilla-seed-oil
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Seed Oils
**Also Known As:** Perilla frutescens seed oil, Korean perilla oil, Shiso seed oil, Wild sesame oil, Beefsteak plant oil, Chinese basil seed oil, Egoma oil, Deulkkae oil, Zi su zi oil

## Overview

Cold-pressed perilla seed oil is derived from Perilla frutescens seeds and contains 60–65% alpha-linolenic acid (ALA), the plant-based omega-3 fatty acid that serves as a precursor to EPA and DHA. Its primary mechanisms involve ALA's conversion to [anti-inflammatory](/ingredients/condition/inflammation) eicosanoids and the [antioxidant activity](/ingredients/condition/antioxidant) of its tocopherol content (approximately 450.88 mg/kg).

## Health Benefits

• High omega-3 content: Contains 60-65% alpha-linolenic acid (ALA), though no clinical trials verify specific health outcomes
• Potential [anti-inflammatory](/ingredients/condition/inflammation) effects: Inferred from ALA content but lacking dedicated human studies
• Rich in [antioxidant](/ingredients/condition/antioxidant)s: Contains tocopherols (450.88 mg/kg) and phenolics (615.25 mg GAE/kg) based on compositional analysis
• Phytosterol content: Contains β-sitosterol (12.72-44.88 mg/100g) though clinical significance unstudied
• Clean extraction profile: Cold-pressing avoids chemical solvents, reducing contamination risk

## Mechanism of Action

ALA in perilla seed oil is converted via delta-6-desaturase and elongase enzymes to EPA and DHA, which compete with arachidonic acid for cyclooxygenase (COX) and lipoxygenase (LOX) enzymes, shifting eicosanoid production toward less pro-inflammatory [prostaglandin](/ingredients/condition/inflammation) E3 and leukotriene B5 rather than PGE2 and LTB4. The tocopherols (primarily gamma-tocopherol) scavenge [reactive oxygen species](/ingredients/condition/antioxidant) and inhibit lipid peroxidation by donating hydrogen atoms to peroxyl radicals, protecting cell membrane phospholipids. Phenolic compounds such as rosmarinic acid may additionally suppress NF-κB signaling, reducing downstream cytokine expression including IL-6 and TNF-α.

## Clinical Summary

Human clinical trials specifically investigating cold-pressed perilla seed oil are largely absent from the published literature, making direct evidence-based health claims premature. Mechanistic and animal studies demonstrate ALA's ability to modulate [inflammatory](/ingredients/condition/inflammation) markers and lipid profiles, but conversion efficiency from ALA to EPA in humans is estimated at only 5–10%, limiting extrapolation from fish oil research. One small open-label Japanese study in atopic dermatitis patients using perilla oil supplementation (~10 g/day for 4 months) reported subjective symptom reduction, though the lack of a placebo control limits its reliability. Overall, the evidence base is preliminary, and robust randomized controlled trials with quantified clinical endpoints are needed before therapeutic recommendations can be made.

## Nutritional Profile

Perilla seed oil is composed almost entirely of fat (~99.9% lipid content by weight), with negligible protein, carbohydrate, and fiber. Fatty acid composition is its defining nutritional feature: alpha-linolenic acid (ALA, omega-3): 60–65% of total fatty acids, making it one of the richest plant-based ALA sources; linoleic acid (LA, omega-6): 13–15%; oleic acid (omega-9): 12–15%; palmitic acid (saturated): 5–7%; stearic acid (saturated): 1–3%. This yields an exceptionally favorable omega-6 to omega-3 ratio of approximately 1:4 to 1:5. Micronutrient and bioactive content per kg oil: total tocopherols ~450.88 mg/kg (primarily gamma-tocopherol, a form of vitamin E with [antioxidant activity](/ingredients/condition/antioxidant)); total phenolic compounds ~615.25 mg GAE/kg; phytosterols including β-sitosterol as the dominant sterol (exact concentration data partially reported, typically 1,000–3,000 mg/kg in cold-pressed seed oils of this class); rosmarinic acid precursors may be present in trace amounts carried over from seed matrix. Bioavailability notes: ALA from plant oils has a conversion efficiency to EPA of approximately 5–10% and to DHA of less than 1% in humans, limiting direct omega-3 equivalence to marine sources. Cold-pressing preserves tocopherol and phenolic integrity versus refined oils. No significant vitamins A, D, C, B-complex, minerals, or dietary fiber are present in meaningful quantities.

## Dosage & Preparation

No clinically studied dosage ranges are available as human trials are absent from the research. Studies only report oil extraction yields (33.17 g/100 g seeds) and fatty acid composition (56-69% ALA content) without therapeutic dosing guidelines. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Cold-pressed perilla seed oil is generally well tolerated at culinary doses, but high supplemental doses may cause mild gastrointestinal discomfort including loose stools or nausea due to its high polyunsaturated fat content. Because ALA and its downstream metabolites EPA and DHA have antiplatelet properties, concurrent use with anticoagulants such as warfarin, clopidogrel, or aspirin may theoretically increase bleeding risk, though clinical case reports are sparse. Individuals with bleeding disorders or scheduled surgeries should exercise caution and consult a physician before use. Pregnancy safety has not been established in controlled human studies, though dietary intake at food-level amounts is not known to be harmful; high-dose supplementation during pregnancy is not recommended without medical supervision.

## Scientific Research

The research dossier reveals no human clinical trials, RCTs, or meta-analyses specifically studying cold-pressed Perilla seed oil. Available data focuses solely on compositional analysis and extraction methods rather than clinical outcomes or therapeutic effects.

## Historical & Cultural Context

The research provides no specific information about traditional medicinal uses of Perilla seed oil. While Perilla frutescens is noted in East Asian contexts with seeds pressed for oil and meals used as animal feed, no traditional medical systems or historical applications are documented.

## Synergistic Combinations

Fish oil, Vitamin E, Turmeric, Black pepper extract, Evening primrose oil

## Frequently Asked Questions

### How much ALA does perilla seed oil contain compared to flaxseed oil?

Cold-pressed perilla seed oil contains approximately 60–65% alpha-linolenic acid (ALA) by fatty acid composition, making it one of the richest plant sources of ALA available. Flaxseed oil is comparable at roughly 53–60% ALA, meaning perilla oil is roughly equivalent or slightly higher in ALA content depending on the specific cultivar and pressing conditions.

### Does perilla seed oil raise EPA and DHA levels in the blood?

Perilla seed oil provides ALA, which must be enzymatically converted to EPA via delta-6-desaturase and then to DHA through further elongation and desaturation steps. Human conversion efficiency is low—typically only 5–10% of ALA is converted to EPA, and less than 1% reaches DHA—so perilla oil is not an efficient substitute for direct EPA/DHA sources such as fish oil or algal oil. Some improvement in plasma ALA and modest EPA increases have been observed in dietary studies, but DHA levels remain largely unchanged.

### What is the recommended dosage of perilla seed oil?

No standardized clinical dosage for perilla seed oil has been established through controlled human trials. In Japanese dietary contexts, perilla oil is used as a culinary oil at roughly 5–14 g per day, which provides approximately 3–9 g of ALA. Supplement doses studied in preliminary research have ranged from 10 g/day, but without robust clinical data, dosage recommendations remain speculative and should be guided by a healthcare provider.

### Can perilla seed oil help with inflammation?

Perilla seed oil's anti-inflammatory potential is primarily inferred from its high ALA content, which can be partially converted to EPA—a precursor to anti-inflammatory prostaglandin E3 and resolvin E-series compounds that compete with pro-inflammatory arachidonic acid metabolites. Additionally, phenolics such as rosmarinic acid may inhibit NF-κB signaling and reduce cytokines like IL-6 and TNF-α. However, no dedicated human randomized controlled trials have directly measured inflammatory biomarker changes from perilla seed oil supplementation, so the evidence remains mechanistically plausible but clinically unconfirmed.

### Is perilla seed oil the same as perilla leaf oil or perilla essential oil?

No—cold-pressed perilla seed oil is a fatty oil extracted from the seeds of Perilla frutescens and is composed predominantly of polyunsaturated fatty acids, especially ALA (60–65%). Perilla essential oil, distilled from the leaves and stems, contains volatile aromatic compounds such as perillaldehyde, limonene, and linalool, and has a completely different chemical profile and application. The two products are not interchangeable; seed oil is used nutritionally and as a supplement, while essential oil is used aromatically or in flavoring.

### Is cold-pressed perilla seed oil safe to take with blood thinners like warfarin or aspirin?

Perilla seed oil contains ALA, which has mild anticoagulant properties, and should be used cautiously with blood-thinning medications like warfarin or high-dose aspirin. Consult your healthcare provider before combining perilla seed oil with anticoagulants, as concurrent use may increase bleeding risk. Your doctor may need to monitor INR levels or adjust medication dosages if you decide to supplement.

### Does cold-pressed perilla seed oil lose its antioxidants over time, and how should it be stored?

Cold-pressed perilla seed oil is susceptible to oxidation due to its high polyunsaturated fat content, which can degrade its tocopherol and phenolic antioxidant compounds. Store the oil in a dark glass bottle in a cool, dark place or refrigerator to slow rancidification and preserve antioxidant potency. An opened bottle typically maintains quality for 2–3 months under proper storage conditions.

### Who should avoid perilla seed oil supplementation, and are there populations for whom it is contraindicated?

People with seafood allergies may have cross-reactivity concerns with perilla seed oil, though this is rare and not well-documented clinically. Individuals taking anticoagulants, those scheduled for surgery, and pregnant or nursing women should consult a healthcare provider before supplementing, as safety data in these populations is limited. Those with a documented perilla plant allergy should avoid this supplement entirely.

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