dsm-firmenich Animal Nutrition & Health has unveiled new research highlighting the potential of essential oil solutions in tackling one of aquaculture’s greatest challenges, the sea lice. The findings, presented at Global Aqua Days 2025 in Athens, Greece, demonstrated how Digestarom® PEP MGE, a matrix-encapsulated blend of essential oils, can reduce parasite attachment in Atlantic salmon by a remarkable 68% compared to control groups.

Sea lice are among the most damaging parasites in salmon farming, creating significant health, welfare, and financial issues. Traditional treatment approaches often exacerbate the problem, causing skin and mucus damage that can weaken fish and increase mortality rates. As the industry seeks sustainable alternatives, the new data suggest that essential oil-based solutions could provide a breakthrough in managing this persistent threat.

Digestarom® PEP MGE combines essential oil components with proven biological functions, including antimicrobial, anti-inflammatory, and antioxidant effects. Beyond parasite control, these properties contribute to improved feed efficiency and growth.

The company added: “The study’s results mark an important step forward in redefining parasite management strategies. With essential oil solutions offering a balance of efficacy, fish well-being, and environmental responsibility, aquaculture producers may gain a powerful tool to safeguard stock and strengthen the industry’s sustainable future.”