MAGNESIUM: Needs vary among individuals. Excess amounts will cause loose stools but are not toxic. To increase levels of the mineral, look for a supplement containing only magnesium, either in pills or as a powder that can be mixed with water or juice. PYCNOGENOL: Studies have used 100 mg daily for adults or 1 mg per pound of body weight, up to 200 mg daily. HERBAL AND HOMEOPATHIC FORMULAS: Follow product directions.