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.
And, whereas calcium supplementation can have negative effects on magnesium levels, magnesium supplementation actually improves the bodyâs use of calcium. Though many reports suggest taking calcium to magnesium in a 2:1 ratio, this figure is largely arbitrary. The ideal ratio for any individual will vary depending on current conditions as well as risk factors for deficiency.