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.
When used as a dietary supplement in the 250 mg to 400 mg range, magnesium can help combat constipation or sluggish bowel without causing diarrhea. The People's Pharmacy February 17, 2014 Constipation 24 Comments. Millions of people around the world suffer from daily constipation.