Quick Summary
Perilla oil is a specialty lipid supplement derived from the seeds of the Perilla frutescens plant. It is primarily used as a source of omega-3 fatty acids, notably alpha-linolenic acid (ALA). Despite growing interest, research into its health effects is still in early stages, and current evidence does not conclusively establish specific benefits. Consumers should be aware that official recommendations and authorized health claims are not available at this time.
What Is It?
Perilla oil is an edible plant oil extracted from the seeds of Perilla frutescens, a herbaceous plant native to East Asia. It is characterized by a high content of polyunsaturated fatty acids, with alpha-linolenic acid (an omega-3 fatty acid) constituting a major portion. Perilla oil is sometimes used as a dietary supplement to increase omega-3 intake, similar to flaxseed or fish oils.
How It May Work in the Body
Perilla oil may support health primarily through its omega-3 fatty acid content. Alpha-linolenic acid (ALA) is a short-chain omega-3 fat that can serve as a precursor to longer-chain omega-3 fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which play roles in cell membrane function and inflammation regulation.
Proposed mechanisms include:
- Conversion of ALA to EPA and DHA, which have been widely studied for their anti-inflammatory properties and cardiovascular effects.
- Modulation of inflammatory pathways by influencing the production of pro- and anti-inflammatory mediators.
- Supporting membrane fluidity and function in various cells through incorporation of polyunsaturated fatty acids.
However, it is important to note that the conversion of ALA from perilla oil into EPA and DHA in humans is relatively inefficient. Moreover, specific clinical studies investigating these mechanistic effects directly from perilla oil supplementation remain scarce and inconclusive.
Common Supplement Forms
- Softgel capsules containing perilla seed oil
- Liquid oil, often bottled for oral use or culinary purposes
Typical Dosage and How It Is Used
Currently, no well-established typical dosage guidelines exist for perilla oil supplementation. There are no official recommended daily intakes specifically for perilla oil or its active fatty acids in supplement form.
Because clinical safety data are limited, it is advisable to approach dosage cautiously and follow any manufacturer instructions or healthcare provider guidance. Dosages used in studies of perilla oil are not well defined or standardized.
Natural Sources
- Seeds of the Perilla frutescens plant
Absorption and Bioavailability
Perilla oil provides alpha-linolenic acid, which is absorbed in the digestive tract. The bioavailability of ALA from plant oils like perilla oil can depend on factors such as the oil’s form (liquid versus capsule) and presence of other dietary components (e.g., fats enhance absorption of fat-soluble nutrients).
Specific studies on absorption or bioavailability of perilla oil are limited, and no substantial evidence distinguishes the bioavailability of different perilla oil supplement forms.
Potential Benefits: What Does the Evidence Say?
Heart and Cardiovascular Health
Omega-3 fatty acids have been extensively studied for their association with heart and cardiovascular health. Because perilla oil is rich in alpha-linolenic acid, preliminary research suggests it might influence factors related to cardiovascular wellbeing.
However, human clinical evidence focused on perilla oil itself remains insufficient to draw firm conclusions. No high-quality randomized controlled trials have definitively demonstrated cardiovascular benefits from perilla oil supplementation.
Inflammation
Omega-3 fatty acids are involved in modulating inflammatory responses. While ALA from perilla oil may contribute to anti-inflammatory processes, direct evidence from human clinical studies on perilla oil’s effects on inflammation is limited.
Most available data are from mechanistic or animal studies, with human results being mixed or insufficient to confirm efficacy.
Side Effects and Safety
There is a lack of comprehensive safety data for perilla oil supplementation in humans. No specific side effects, contraindications, or toxicity concerns have been well established in the scientific literature.
Given the limited data, consumers should exercise caution and monitor for any adverse reactions when using perilla oil supplements.
Drug and Supplement Interactions
There are no well-documented interactions between perilla oil and medications or other supplements. However, due to limited research, interactions cannot be ruled out, especially with drugs affecting blood clotting or lipid metabolism.
Who Should Be Careful?
People who are pregnant, breastfeeding, have existing medical conditions, take prescription medications, or are planning to undergo surgery should consult a healthcare professional before starting perilla oil supplementation. This precaution helps manage potential risks related to unknown safety profiles and interactions.
Pregnancy, Breastfeeding and Special Populations
Specific safety data for perilla oil supplements during pregnancy and breastfeeding are not available. Given the general importance of omega-3 fatty acids in these populations, sources like fish oil are more commonly studied. Anyone considering perilla oil in these special populations should seek medical advice.
Quality, Standardization and What to Look For
When choosing perilla oil supplements, quality and purity are important considerations. Look for products from reputable manufacturers that provide clear labeling, including the source of the oil, fatty acid content, and any third-party testing or certification.
Standardization of perilla oil supplements is not well established, and consumers should be cautious of products making unverified health claims.
Frequently Asked Questions
- Is perilla oil the same as flaxseed oil?
While both provide alpha-linolenic acid, perilla oil is derived from Perilla frutescens seeds, mainly used in East Asia, whereas flaxseed oil comes from flax seeds. Their fatty acid profiles are similar but not identical. - Can perilla oil replace fish oil for omega-3 intake?
Perilla oil provides the plant-based omega-3 ALA, but the body converts ALA inefficiently into EPA and DHA found in fish oils. Thus, perilla oil may not fully substitute for fish oil, especially if EPA/DHA are the desired omega-3 forms. - Are there official dosage recommendations for perilla oil?
No official recommended daily intake exists for perilla oil. Dosage guidelines are not well defined in clinical research. - Does perilla oil have authorized health claims in the EU?
Currently, no EU-authorized health claims exist specifically for perilla oil.
Evidence Limitations
- No well-designed human clinical trials or systematic reviews have been identified that focus exclusively on perilla oil supplementation.
- Safety and efficacy data for perilla oil remain incomplete and insufficient to support strong conclusions.
- There are no established official intake recommendations or authorized EU health claims for perilla oil.
References
Last Reviewed
June 2024
Disclaimer: This page provides general information based on current evidence and does not constitute medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Always consult a healthcare professional before starting any new supplement, especially if you are pregnant, breastfeeding, have a medical condition, or take medication.