If you narrow it down to two of the most common, you’ll be looking at magnesium glycinate vs. magnesium citrate. Potential downsides of magnesium glycinateAs far as possible downsides, Bakovic says that magnesium glycinate is typically more expensive than other types of magnesium supplements. In the Nutrients study mentioned above, magnesium citrate was one of only two forms of magnesium (magnesium oxide was the other) that were better absorbed than magnesium glycinate. Magnesium glycinate vs. magnesium citrate: Which is better for you? If you’re feeling backed up or have been told you need to increase your magnesium levels, magnesium citrate might be the way to go.