Signs stymtoms of lack of Magnesium: 1. Osteoporosis 2. Sleeplessness 3. Hopelessness 4. Numbness 5. Lower back pain Magnesium sources 1. Nuts, seeds 3. Fish, (Salmon) 4. Green vegetables, for growth, (Heigh; especially, from teenager-18 year of age), and brain development Who needs it? 1. Increasingly/oftenly urinating 2. Gastro- internal problems 3. Treatment of lack of magnesium, Must consult your physician , since it will have side effects. Circulation problems; especially; in lungs for breathing., arteries in heart and brain, result in stroke or heart attack. Dosage usage per day: 1. Teenager 360 mg. 2. Adult woman 360 mg 3. Man 460 mg 4. Obtain blood test regularly. 5.