Metagenics Cenitol is a dietary supplement for nervous system function support. It includes inositol that is a naturally occurring part of cell membranes. Inositol also has a major role in cell signaling. Cenitol also provides magnesium as an amino acid chelate. Cenitol is provided in powder form for easy, convenient dosing. Recommended use: Mix about one scoop (7.4 g) in water or juice, one to three times daily or as directed by a healthcare professional.