Dissolve CanPrev Magnesium Bis-Glycinate Powder in liquid, or take as directed by a health care practitioner. Children: Ages 1-3 years: ¼ scoop per day; ages 4-8 years: ½ scoop per day Adolescents: ages 9-18 years; 1 rounded scoop per day Adults: 1-2 rounded scoops per day