Nutergia Natur'Alkyl 90 Capsules is a food supplement based on wild fish liver oil containing special compounds called alkylglycerols, which contribute to strengthening the body's natural defenses. In the human body, alkylglycerols are present in certain organs (bone marrow, spleen, liver) and play a role in the immune system. Food supplements should never replace a healthy, diversified and balanced diet and a healthy lifestyle.