Neurogan CBD tinctures contain a wide range of cannabinoids from 500-12,000MG. Neurogan tinctures feature the abbreviations oz & MG. The amount of CBD in each of our tinctures is measured in MG, whereas the size of the bottle is listed as oz. Choose from either a 1oz, 2oz, or .34 oz bottle of CBD spray or CBD oil. View our CBD sprays and oils, here.