The role of dietary supplements Dietary supplements are not a substitute for a balanced and healthy diet. Instead, they should be used to support the body during natural periods of detoxification, such as during fasting or dietary changes. BioChlorella, which is enriched with vitamin B12, folic acid, vitamin K, and iron, is one example. These ingredients promote the normal formation of red blood cells (Vit. B9, Vit. B12, Fe), the normal function of the nervous system (Vit. B9) and help reduce tiredness and fatigue (Vit. B9, Vit. B12, Fe).