It plays an essential role in the metabolic processes. It helps in functioning of the nervous system. It is beneficial during periods of increased physical and mental stress. It is high potency sustained release nutritional supplement. The sustained release principle involves the leaching of vitamins and minerals.Sustained Release B-Complex 50 provides seven individual B vitamins make up this family of nutrients that help convert the food you eat into cellular energy that fuels your body. Specially formulated to provide a gradual release of vitamins over a prolonged period of time.