Magnesium glycinate or magnesium citrate? Before picking one for sleep, check the amount of elemental magnesium. The largest number on the front may describe the whole compound. If a fictional label says two capsules provide two hundred milligrams of magnesium, that is one hundred per capsule. It does not mean two hundred in each. Read the serving size alongside the nutrient amount. Magnesium citrate appears in supplements and in medicines for short term constipation. Those products have different instructions. Do not treat a laxative bottle as a nightly sleep supplement. Glycinate is widely marketed for bedtime, but neither form comes with a reliable promise of better sleep. Keep track of your actual problem, such as trouble falling asleep, and look at caffeine timing and your sleep routine. Check other supplements too, including electrolyte powders. Kidney disease and some medicines change what is appropriate, so a pharmacist can help you check the full combination instead of adding the label numbers in isolation. The article below compares the forms, explains elemental magnesium and includes a simple two label worksheet. Choose around the reason you are considering it, not just a bedtime claim on the package.