Yoga exercises could stimulate the passage of (green) food and/or (originally green) bile through your bowel, and then either the food or bile would color the stool green. If stools are loose and contain undigested food, you are losing nutrients this way.
Excessive use of magnesium supplements can be toxic. The upper limit -- the highest dose a person can take -- of magnesium supplements is: 65 mg/day for children ages 1-3. 110 mg/day for children ages 4-8. 350 mg/day for adults and children ages 9 and up.
Determining the Correct Dosage of Magnesium. Initially it was thought that adults needed between 100 and 150 mg of magnesium per day in order for the body to function optimally. However, new research has shown that up to 75% of the worldÃ¢â¬â¢s population is in fact severely deficient in this essential mineral.