
Originally Posted by
Windex
Magnesium Oxide has a bioavailability of about 5-8%. At 150mg per capsule for example, best case scenario is your body actualizes 12mg of the 150, assuming the capsule dose even matches the label. It's also the only form of magnesium that has been linked to negative repercussions to the human body. To put it into perspective, a bag of kale/spinach is going to have more magnesium than the entire bottle of MgOxide.
I stopped using IM B12 when I switched to activated B Complex and found it to be substantially better. The broscience dose of IM B12 1000mcg/day