Many patients complain that they have been taking magnesium supplements to improve sleep but do not see any impact despite being regular with their use. Taking magnesium may help people fall asleep faster, sleep longer. You need the following for sleep:– Magnesium Glycinate: This is one of the best forms for sleep because it is well-absorbed and gentle on the stomach. Are Magnesium Gummies Safe? Magnesium gummies are chewable supplements that contain magnesium along with flavoring and a small amount of sugar.