Magnesium Glycinate vs Magnesium Citrate: Which Should You Take?

The short answer

Magnesium glycinate is generally the better choice for sleep, anxiety and muscle relaxation because it's gentle on the stomach and absorbs well. Magnesium citrate is generally the better choice for occasional constipation because it draws water into the gut and has a mild laxative effect. If you're not sure which issue you're solving for, keep reading.

What is magnesium glycinate?

Magnesium glycinate is magnesium bound to glycine, an amino acid that has its own calming, sleep-supportive properties. This combination makes it one of the most bioavailable forms of magnesium available, meaning your body absorbs more of it, and it does so without the digestive side effects that other forms can cause. It's the form most often recommended for:

• Sleep quality and falling asleep faster
• Muscle cramps, tension and restless legs
• Stress and everyday anxiety support
• Long-term daily supplementation, since it's gentle enough to take consistently

What is magnesium citrate?

Magnesium citrate is magnesium bound to citric acid. It also absorbs reasonably well, but its defining trait is an osmotic effect in the gut — it pulls water into the intestines, which is why it's a standard recommendation for occasional constipation. Common uses include:

• Occasional constipation relief
• General magnesium repletion when digestive tolerance isn't a concern
• Situations where a mild bowel-regulating effect is actually welcome

The tradeoff: at higher doses, magnesium citrate is more likely to cause loose stools or cramping, which makes it a less predictable choice if your goal is sleep or stress support rather than digestion.

Magnesium glycinate vs citrate: side by side

How much magnesium do you actually need?

Health Canada's recommended dietary allowance for adults is roughly 310–320 mg/day for women and 400–420 mg/day for men, and most people fall short of this from food alone. Supplement labels usually list elemental magnesium per serving — check this number rather than the total compound weight, since glycinate and citrate products contain different percentages of actual elemental magnesium by weight. Most people do well starting at 200–400 mg of elemental magnesium per day and adjusting based on how they feel.

Who should be cautious

Magnesium supplements are considered safe for most healthy adults, but anyone with kidney disease should talk to a healthcare provider before supplementing, since impaired kidneys can't clear excess magnesium efficiently. The same goes if you're taking certain antibiotics, diuretics, or medications for osteoporosis, as magnesium can interact with absorption. If you're pregnant, breastfeeding, or managing a chronic condition, check with your doctor or pharmacist first.

The bottom line

If sleep, stress or muscle tension is the goal, magnesium glycinate is the more targeted, better-tolerated option for daily use. If occasional digestive relief is what you need, magnesium citrate does double duty. Some people even keep both on hand for different purposes — there's no rule against it, as long as you're tracking your total elemental magnesium intake across products.