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Krill oil delivers Omega-3 as phospholipids for better joint and brain uptake — but harvesting it comes with serious limits.
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Natural IngredientsOsteoarthritis is a common chronic disease that affects the mobility and comfort of many dogs. Turning to dietary supplements rich in marine Omega-3 is an increasingly recommended strategy for their powerful anti-inflammatory role and their ability to modulate joint pain.
L'huile de krill antarctique (Euphausia superba) is often presented as the most effective source of Omega-3 due to its unique phospholipid structure, which ensures optimal absorption.
However, this small crustacean is also at the heart of major environmental issues: it is the cornerstone of the Antarctic food chain, and intensive fishing directly threatens the balance of marine ecosystems.
This comprehensive guide explores the scientifically proven benefits of krill oil in dogs, its mechanism of action, and above all the ethical limitations and more sustainable alternatives available today.
Antarctic krill (Euphausia superba) is a species of small crustacean, resembling a shrimp, that lives in the cold waters of the Southern Ocean, around Antarctica. It is a fundamental element of the marine ecosystem, serving as the main food source for many marine animals such as whales, seals, penguins, and numerous fish.
Krill also plays a crucial role in the carbon cycle. By feeding on carbon-rich phytoplankton and then excreting waste into the depths of the ocean, it helps sequester atmospheric carbon dioxide (CO2) in the seabed.
The oil extracted from this crustacean is highly prized in supplementation for its richness in Omega-3 fatty acids (notably EPA and DHA). Unlike fish oils where Omega-3 are in triglyceride form, those from krill are predominantly in phospholipid form.
Phospholipids are lipids that make up the membranes of our cells (and those of dogs). Having Omega-3 directly in this phospholipid form allows better absorption and assimilation by the body and brain of the dog compared to the triglyceride form of conventional fish oils.
Krill oil also naturally contains astaxanthin, a powerful antioxidant that protects cells against free radicals and gives the oil its red color.
The effects of krill oil stem mainly from its unique profile of long-chain Omega-3 (EPA and DHA) and the antioxidant astaxanthin, both delivered in a highly bioavailable form: phospholipids.
The main role of Omega-3 in joint support and reducing the symptoms of osteoarthritis in dogs is the modulation of the inflammatory response.
The astaxanthin, a carotenoid present in krill oil, acts as a powerful antioxidant (Bengtson Nash et al., 2014).
DHA is a major component of neuronal membranes. Its increased presence in the brain thanks to better incorporation via phospholipids supports membrane fluidity and nerve signal transmission.
Krill oil has demonstrated a protective effect against cognitive disorders and neuroinflammation in animal models (Choi et al., 2017), suggesting a potential role in supporting the brain functions of aging dogs.
Marine Omega-3 are widely recognized as valuable allies for dog health, particularly for joint support and reducing inflammation. Krill oil, with its highly bioavailable phospholipid form, shows promising benefits:
Despite its advantages, the use of krill oil is not without limitations, particularly from an ethical and environmental standpoint.
Antarctic krill fishing, intended for aquaculture and the [REDACTED] of dietary supplements, is a source of ecological concern.
Although krill oils are generally considered low in contaminants, studies have highlighted a risk of contamination by heavy metals (such as arsenic) and oxidized lipids, which must be monitored to ensure product safety (Zhang et al., 2025; Kizilirmak et al., 2021).
Faced with the growing limitations linked to krill, several sources of Omega-3 are emerging today as safer, more stable, and significantly more sustainable options. Two of them stand out particularly: microalgae oil and green lipped mussel oil.
Marine microalgae are the aquatic organisms that naturally synthesize EPA and DHA, which offers numerous advantages:
Microalgae oil is today the preferred source of EPA and DHA for many laboratories committed to ethical solutions in animal and human health.
Learn more about algae oil
New Zealand green lipped mussel (Perna canaliculus) is recognized as a versatile solution for joint support. Its unique lipid composition gives it multiple benefits:
Learn more about green lipped mussel oil
Antarctic krill oil is an excellent dietary supplement for dogs, notably thanks to the superior bioavailability of its Omega-3 in phospholipid form, as well as the presence of the antioxidant astaxanthin.
Studies confirm its value for joint support and reducing osteoarthritis symptoms and improving coat quality.
However, it is essential to highlight the major ethical and environmental concerns linked to its fishing in a fragile Antarctic ecosystem, as well as the contamination risk that requires monitoring.
Choosing brands that guarantee sustainable and responsible fishing is crucial. Alternatives such as green lipped mussel oil or microalgae oil, ethical sources rich in EPA and DHA, can be considered for an effective Omega-3 intake aimed at joint support.
To guarantee a complete and ethical solution for your dog's mobility, Laboratoire Sensilia has developed PERNIXOL®, a natural joint supplement that combines proven efficacy and sustainability.
Discover PERNIXOL®
This article was written by the R&D team at Laboratoire Sensilia, experts in animal nutrition.