Health Guide

Heneicosapentaenoic acid

Let's talk about a powerhouse omega-3 fatty acid that often gets overshadowed by its famous cousins, EPA and DHA: **Heneicosapentaenoic acid (HPA)**. Also known as 21:5n-6, this long-chain polyunsaturated fat is a crucial player in your body's cellular communication. While it's technically an omega-6, it behaves much like an anti-inflammatory omega-3 in the body. Think of it as a specialized fuel that helps keep your cell membranes fluid, your brain signaling sharp, and your inflammatory response balanced. It’s naturally found in certain marine oils and specialty seeds, offering unique benefits that support metabolic health and cognitive function.
Evidence BasedDietary Supplement
Heneicosapentaenoic acid
VERIFIED SOURCE

Bio-Activity Analysis

Inflammatory Response Modulation

SCIENTIFIC DATA VISUALIZATION

Y-Axis
Inflammatory Potential
Fatty Acid Type

Health Benefits & Sources

Why You Need It

  • Balances Inflammation: Unlike common omega-6s that can spark inflammation, HPA helps produce molecules that resolve inflammation, keeping your body in a state of healthy equilibrium.
  • Supports Brain Health: It contributes to the structural integrity of brain cell membranes, facilitating clear communication between neurons for better focus and memory.
  • Promotes Metabolic Wellness: Early research suggests HPA plays a role in regulating glucose and lipid metabolism, supporting a healthy weight and energy levels.

Deep Dive

Heneicosapentaenoic acid (HPA) is a specialist in the lipid world. While most dietary omega-6s (like linoleic acid) are pro-inflammatory, HPA acts differently. It competes with arachidonic acid (a highly inflammatory omega-6) for space in your cell membranes. By taking its place, HPA reduces the production of inflammatory compounds and increases the production of resolvins and protectins—molecules that actively 'resolve' inflammation. This makes it a unique ally for joint comfort, cardiovascular health, and preventing chronic low-grade inflammation. It is particularly concentrated in the retina and brain, suggesting a vital role in visual processing and cognitive longevity.

Natural Food Sources

HPA is not found in common fruits or vegetables. It is primarily sourced from specific marine life and rare plant oils.

FoodAmount% DV
Seal Blubber OilVery HighN/A
Shark Liver OilVery HighN/A
Menhadens (Fish)ModerateN/A
Tuna (Dark Muscle)LowN/A
Evening Primrose OilTraceN/A

Supplementation

Because HPA is difficult to obtain from a standard diet, supplementation is the most practical way to increase intake. Look for specialized marine oil supplements or high-grade evening primrose oil blends. Typical dosages in research range from 500mg to 2g daily, but always follow the manufacturer's instructions or a doctor's advice. This is particularly relevant for individuals seeking non-inflammatory fatty acid support without relying solely on fish oil.

Top Food Sources

Seal Oil
Rich in long-chain omega-3s and HPA
Menhaden Fish
Small, oily fish often used for oil extraction
Shark Liver Oil
Potent source, though sustainability is a concern
Evening Primrose Oil
Contains trace amounts alongside GLA
Tuna (Dark Meat)
Minimal amounts compared to supplements

Frequently Asked Questions

Technically, HPA is an Omega-6 fatty acid (21:5n-6). However, due to its chemical structure and long chain length, it exhibits the anti-inflammatory properties typically associated with Omega-3s.
Most commercial fish oils focus on EPA and DHA, which are more abundant in fish flesh and easier to extract. HPA is found in trace amounts or in specific marine oils like seal or shark liver oil.
It is found in trace amounts in Evening Primrose Oil (EPO). However, EPO is primarily composed of Gamma-Linolenic Acid (GLA). To get significant amounts of HPA, marine sources are usually required.
Yes, like most polyunsaturated fats, HPA is sensitive to heat, light, and air. Consuming sources fresh or taking encapsulated supplements is the best way to ensure potency.

Safety & Side Effects

HPA is generally considered safe when consumed at dietary levels. In supplement form, high doses may increase bleeding risk, similar to other omega-3 fatty acids. Individuals with fish or shellfish allergies should avoid marine-derived supplements. Those on blood thinners (like Warfarin) or scheduled for surgery should consult their healthcare provider, as high doses can affect blood clotting.

Scientific References

  • [1]Dyerberg, J., et al. (1980). 'Eicosapentaenoic acid and HPA derivatives in prevention of cardiovascular events.'
  • [2]Kolanowski, W. (2007). 'Bioactivity of omega-3 fatty acids in the prevention of lifestyle diseases.'
  • [3]Lands, W. E. (2001). 'Fish, Omega-3 and Human Health.'