I wish I had known this sooner. Magnesium Oxide is the most common type of magnesium used, yet it on has a 5% absorption rate. I've got 2 bottles of it that are now useless to me. Now you know why I am such a fan of Dr. Eric Berg. The best magnesium - Magnesium glycinate is the most absorbable type of magnesium. There are a lot of magnesium glycinate benefits. It’s gentle on the GI system, helps prevent muscle spasms, supports sleep and relaxation, and reduces stress. Magnesium glycinate may help relieve migraines and won’t interfere with other minerals. 400mg is the optimal dosage. Consider taking 400 mg of magnesium glycinate each night as a maintenance dose. Double this for a therapeutic dose and take throughout the day. The BEST and WORST Forms of Magnesium https://rumble.com/v5fp5wi-the-best-and-worst-forms-of-magnesium.html