The recommended magnesium intake for adults is given by Eat Right Ontario as between 310 and 400 mg per day. Other experts recommend a higher intake daily. For example, Dr. Carolyn Dean suggests that adults consume 3 – 4 mg of magnesium per pound of body weight and that pregnant women and children consume 4 – 5 mg of magnesium per pound of body weight.
Daily needs will vary based on lifestyle, health, and stage of life.