Proudly Australian Grown and Made in Jervis Bay
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Sustainably harvested in Jervis Bay
More Eggs. Stronger Shells. Healthier Hens.
True Grit — 100% Australian Mussel Shell Grit for Backyard Chickens & Poultry
96% Calcium Content
Independently Trialled at Bega Eggs
Zero-Waste Production
No Additives or Synthetics
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"I've seen a massive difference in my flock. The eggshells are rock-solid now and the girls have never looked healthier!"
Product description
More Eggs. Stronger Shells. Healthier Hens.
True Grit — 100% Australian Mussel Shell Grit for Backyard Chickens & Poultry
A natural, slow-release calcium supplement made from granulated blue mussel shells, a byproduct of our Jervis Bay mussel production. 96% calcium content. No additives. No synthetics. Independently trialed at Bega Eggs with notable improvements in eggshell thickness and durability.
Why your hens will thrive on it
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Stronger, more resilient eggshells — fewer breakages and deformities
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Supports bone health and skeletal development in poultry
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Slow-release calcium for consistent, ongoing absorption
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96% calcium content — one of the highest available naturally
- Granulated 2-4mm size optimised for poultry digestion
Why True Grit
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100% natural — no artificial additives or chemicals
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Sustainably sourced from our Jervis Bay mussel production
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Zero-waste — repurposed shells that would otherwise go to landfill
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Independently trialled at Bega Eggs with proven results
- Available in granulated (2-4mm) or fine powder
High Protein (52.8 g per 100 g): Supports strength, recovery, and daily energy.
Omega-3 (4.83 g per 100 g): Reduces inflammation, supports mobility, and promotes healthy skin & coat.
Phospholipids (67–68%): Help pets absorb omega-3s more effectively.
EPA & DHA (3.84 g per 100 g combined): Backed by science for joint health, brain function, and resilience.
Jervis Bay Mussel Powder is a simple, food-first way to support your dog’s daily nutrition. It blends easily with kibble, raw, home-cooked and wet food, making it easy to add to any feeding routine without changing what your dog already eats.
Daily Serving
Add the powder once daily as part of your hen's regular meal.
If your hen is new to marine-based supplements, start with a smaller amount for the first few days and gradually build up to the recommended serve. This allows their digestive system to adjust while still introducing the benefits.
Recommended Daily Serve
Up to 1 teaspoon daily
Jervis Bay Mussel Powder is a whole-food, single-ingredient supplement, not a concentrated extract. Exact dosing does not need to be precise. Consistency over time is what delivers the best results.
For Best Results
Use daily as part of your normal feeding routine. Store in a cool, dry place and keep the lid tightly sealed to maintain freshness.
This simple addition helps turn everyday meals into a more complete, nutrient-dense bowl for your dog.
At Marine Vitality, every batch of our Jervis Bay Mussel Powder is supported by independent analysis and industry recognised quality standards. Our approach is simple. If we claim it, we can verify it.
Independent Laboratory Analysis
Our mussels undergo detailed laboratory testing to confirm their nutrient profile, including protein levels, omega 3 composition and phospholipid content. This testing verifies the high levels of EPA, DHA and phospholipid bound omega 3s that set Jervis Bay Blue Mussels apart from standard mussel powders, including Green Lipped Mussel.
Phospholipid Bound Omega 3s
One of the most important findings in our research is the naturally high percentage of phospholipid bound omega 3s. Independent analysis shows that Jervis Bay Blue Mussels contain 68 percent phospholipid bound omega 3s, which supports superior absorption and more effective delivery of EPA and DHA.
Nutrient Density and Protein Quality
Testing also confirms the rich protein content and broad nutrient profile of our mussels. The protein is naturally complete and highly digestible, making it suitable for both dogs and cats as a daily nutritional support.
Comparative Analysis
Our mussels have been directly compared with standard mussel powders, including New Zealand Green Lipped Mussel. The findings show naturally higher levels of bioavailable omega 3s and a stronger overall nutrient density in Jervis Bay Blue Mussels. These differences reflect both species characteristics and the unique marine environment of Jervis Bay.
Sustainable, Local and Traceable
All mussels are produced in the pristine waters of Jervis Bay and processed under strict quality controls. Our production is zero waste, with both mussel meat and shell utilised. We work with accredited facilities that meet Australian food safety and aquaculture standards to ensure consistency and purity in every batch.
Ongoing Quality Assurance
We continue to work with researchers and industry partners to refine our data and maintain a high standard of product integrity. As more research becomes available, we will update our testing summaries so that customers always have clear and current information about what is in their pet’s bowl.
This commitment to transparency and ongoing testing is at the heart of Marine Vitality. We want you to feel confident that every serve of Jervis Bay Mussel Powder is grounded in real science and produced with care.
- Processed in a NSW Food Authority approved human-grade facility.
- Best Aquaculture Practices (BAP) certified
- Responsible, sustainable farming.
- Zero-waste production – every part of the mussel and oyster is put to use.
- Award-winning quality – trusted in premium food, now crafted for pets.
Have a question?
30 Day Risk-Free Trial
Free Shipping On Orders Over $80
Sustainably harvested in Jervis Bay
True Grit Shell Grit — 3kg
Key Benefits of True Grit Mussel Shell Grit
Bega Eggs Independent Trial
Demonstrated a notable improvement in eggshell thickness, durability, and overall hen health
96% calcium content
Strengthens eggshells, reduces breakage, and supports healthy bone development in poultry.
Optimal grit size for maximum calcium absorption
2–4mm granules match a hen's gizzard- fully absorbed, not wasted. Fine powder also available.
Eco-Friendly & Sustainably Sourced
100% natural and produced from sustainably harvested Jervis Bay mussels.
Additional applications: natural soil conditioner
Mussel Shell Grit is not only valuable for animal feed but also serves as an effective soil conditioner. When applied to agricultural land, it helps:
🗸 Improve soil pH by reducing acidity
🗸 Enhance soil structure & water retention
🗸 Provide slow-release calcium for plant growth
A natural, zero-waste use — made from Jervis Bay mussel shells, nothing is wasted.
How To Use
A simple, food-first way to support your animal's daily nutrition.
Sprinkle over your hens' daily feed
See dosage guide below for hens
Mix into grain, pellets, mash or wet feed
Blends into any feed type, no changes to their routine
Serve once daily at their regular feeding time
Consistency over time delivers the best results
Recommended Daily Serve
( 1 teaspoon ≈ 2–2.5 g )
Many hens do well on less. Exact dosing does not need to be precise.
Up to 1 teaspoon daily
A quick note
Jervis Bay Mussel Powder is a whole-food, single-ingredient supplement, not a concentrated extract. Consistency over time is more important than exact amounts.
For Best Results
Use daily as part of your normal feeding routine. Store in a cool, dry place and keep the lid tightly sealed to maintain freshness. This simple addition supports a more complete, nutrient-dense bowl without disrupting your Hen's routine.
Meet The Chief
In this interview, Scott, CEO of Marine Vitality, shares the story behind the brand and why it exists.
Farming mussels in the pristine waters of Jervis Bay, Scott has spent his career in aquaculture, drawn to shellfish farming for its sustainability and ability to work with nature rather than against it.
Real Results. Real Joy.
Marine Vitality isn’t just another pet supplement — it’s functional ocean nutrition made simple.
Each ingredient is pure, powerful, and purpose-driven to enhance your pet’s daily health and vitality.
One ingredient at a time. No fillers. No fluff. Just results.
Sprinkle it daily — nature takes care of the rest.
Mussel Powder Magic
Protein + Omega-3s for strength and mobility.
Sustainably sourced from pristine Jervis Bay waters, our Australian Mussel Powder delivers essential nutrients that support joint health, flexibility, and overall vitality.
Meet our resident pet nutritionist
Ruth Hatten
Meet our resident pet nutritionist
Ruth Hatten
As an animal naturopath and pet nutritionist, I only stand behind products that align with my values - clean, nourishing, and supportive of real, lasting health.
Marine Vitality’s mussel powder is rich in naturally occurring nutrients that support joint health, mobility, immune resilience, skin repair and overall vitality in dogs and cats.
With just a small amount, you can meaningfully boost your pet’s bowl. I’m proud to lend my name to these natural, science-backed, Australian-sourced products that bring the best of marine nutrition to everyday feeding.
Frequently Asked Questions
Marine Vitality is 100% pure Australian blue mussel powder — nothing else. No fillers, no additives, no synthetics. The mussels are sustainably farmed in Jervis Bay, NSW, and gently processed to preserve their natural nutritional profile. Each serve delivers naturally occurring omega-3 fatty acids, glucosamine, chondroitin, high-quality marine protein and phospholipids.
Yes — it's the exact same 150g mussel powder. The active ingredient and nutritional profile are identical. We've created a separate horse page because the dosing, introduction schedule and feeding tips are different for equines, but the product itself is the same one trusted by dog and cat owners across Australia.
Both are valued sources of marine nutrition, but Australian blue mussels have some distinct advantages. Independent analysis by the University of Newcastle found our Jervis Bay mussel powder delivers a higher total omega-3 content (4.83g per 100g vs 3.9–4.5g for NZ green-lipped mussels) and a higher phospholipid fraction (68% vs ~59%). Phospholipid-bound omega-3s are more readily absorbed by the body than free fatty acids, which means your horse gets more out of every serve. Our mussels are also farmed and processed entirely in Australia — no import lag and full traceability from sea to stable.
Most horse owners start to notice changes in comfort and movement within 3 to 6 weeks of reaching the full daily dose. Results vary depending on your horse's age, weight, existing joint condition and overall diet. The loading phase (double dose for the first two weeks) is designed to build up levels faster. Consistency is key — this is a whole-food supplement that works best as part of a daily routine.
Product & Nutrition
Jervis Bay Mussel Powder is a single-ingredient, whole-food supplement made from 100% Australian blue mussel meat. It provides naturally occurring omega-3 fatty acids, phospholipids, protein and marine amino acids to support overall wellbeing as part of a balanced diet.
We use Australian blue mussels sustainably grown in Jervis Bay, NSW. Our mussels are grown, harvested and processed locally, giving us full traceability from sea to bowl.
Australian blue mussels are a highly nutritious marine food, naturally rich in omega-3s, phospholipids, protein and marine amino acids.
Independent research has shown Australian blue mussels to be comparable, and in some areas nutritionally superior to green-lipped mussels, particularly in phospholipid content, which supports bioavailability. Local sourcing also allows greater control over freshness and quality.
Jervis Bay Mussel Powder is a whole-food powder, not an extract. The mussels are gently processed and milled without isolating or concentrating individual compounds. Nutrients remain in their natural food matrix, supporting gentle digestion and long-term use.
Bioavailability refers to how easily nutrients are absorbed and used by the body. In whole marine foods like mussels, omega-3s are naturally bound to phospholipids, which can support absorption compared to isolated oils. This makes whole-food marine nutrition a food-first option for everyday use.
No. Jervis Bay Mussel Powder is a supplementary whole food designed to be added to your pet’s existing diet. It does not replace complete pet food.
Yes. Jervis Bay Mussel Powder is designed to complement a wide range of feeding styles, including raw, home-cooked, fresh and premium commercial diets.
No. The product contains one ingredient only: whole Australian blue mussel meat.
Our mussels are grown in the clean, nutrient-rich waters of Jervis Bay and produced in accordance with Australian food safety standards. Independent testing has shown levels to be within safe limits.
As a whole-food product, nutrient levels can naturally vary between harvests and seasons. Rather than isolating or standardising individual compounds, we focus on consistent quality, sourcing and processing so nutrients remain in their natural food form.
Our zero-waste aquaculture model means every part of the mussel harvest is valued and utilised. This supports sustainability while allowing us to maintain freshness, reduce unnecessary processing and keep full control over quality.
Store in a cool, dry place with the lid tightly sealed to maintain freshness