Spirulina is a blue-green algae and one of the most nutrient-dense natural ingredients available.
In Skin & Coat it does several jobs at once: it's rich in essential fatty acids that nourish the skin, it helps reduce inflammation and the itchiness that comes with it, and it supports a shiny, healthy coat. It's also a natural antioxidant, and the source of the chews' natural dark green colour.
A 2025 peer-reviewed study in the Journal of Advanced Veterinary and Animal Research confirmed spirulina's anti-inflammatory properties in animal models, with effects comparable to established anti-inflammatory treatments.
Because it's plant-derived, spirulina fits PawStrong's fish-and-plant, hypoallergenic approach perfectly, supporting skin health without relying on common proteins that can trigger sensitivities.