The only nuclear medicine procedure i know for imaging the pituitary gland, a rather exotic one, ist I-123 IBZM (iodobenzamide) SPECT in prolactinomas. in general, pituitary diseases are investigated with MRI. but Tc-99m MIBI can visualise the parathyroid glands.
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.
Some users may take 75 mg doses throughout the day, while others may take 300 mg once a day. A common dose for recreational use is reported to be 300 mg. However tolerance develops quickly and some users may take up to 1,000 mg - 2,000 mg per day to achieve the same effects. Some users have died from taking as little as 8,000 mg (per day), while others have taken as much as 22,000 mg and survived. Price #.