If your stomach is more sensitive, Doctor’s Best High Absorption Magnesium is the best supplement with magnesium. First, created with science-based nutrition, this supplement is up to 6 times better absorbed than other forms of magnesium. Next, the formula is essential in 300 enzyme systems supporting biochemical function, muscle relaxation, and restful sleep. Last but not least, the dietary supplement is easy to swallow, gluten-free, soy-free, and non-GMO.