Best Magnesium for Leg Cramps: 5 Supplements to Consider
Leg cramps are sudden, involuntary muscle contractions that can be painful and may occur during rest, at night, or after physical activity. They can have many possible causes, including muscle fatigue, dehydration, certain medications, pregnancy, and some medical conditions.
Magnesium is an essential mineral involved in normal muscle and nerve function, which is why magnesium supplements are sometimes used by people looking for ways to manage leg cramps. However, magnesium is not a proven treatment for every type of leg cramp, and research on its effectiveness is mixed.
In this guide, we’ll compare five magnesium supplements in different forms and explain what to look for when choosing one. We’ll also cover magnesium dosage, potential side effects, and other approaches that may help with leg cramps.
5 Magnesium Supplements to Consider
Compare the magnesium form, format, serving amount, and who each option may suit.
| Product | Magnesium Form | Format | Magnesium per Serving | Good Fit For |
|---|---|---|---|---|
| Doctor’s Best High Absorption Magnesium | Magnesium glycinate lysinate | Tablets | 200 mg | People who prefer a chelated magnesium tablet |
| Natural Vitality CALM | Magnesium citrate | Powder | 325 mg | People who prefer a drink mix |
| Moon Juice Magnesi-Om | Magnesium gluconate, acetyl taurinate & citrate | Powder | 310 mg | People who prefer a flavored powder with multiple magnesium forms |
| Pure Encapsulations Magnesium | Magnesium glycinate | Capsules | 120 mg per capsule | People looking for a simple glycinate formula |
| Nature Made Magnesium Citrate | Magnesium citrate | Softgels | 250 mg | People who prefer a straightforward citrate softgel |
What Causes Leg Cramps?
Leg cramps can happen for many different reasons, and the cause is not always easy to identify.
Possible contributors include:
- Muscle fatigue or overuse
- Dehydration
- Pregnancy
- Prolonged sitting or standing
- Certain medications
- Changes in muscle or nerve function
- Some underlying medical conditions
Because leg cramps have different possible causes, taking a magnesium supplement isn’t necessarily the right solution for everyone.
If cramps are frequent, severe, persistent, or accompanied by swelling, weakness, numbness, or other concerning symptoms, speak with a healthcare professional rather than relying on supplements alone.
Symptoms of Leg Cramps
Leg cramps typically come on suddenly and can be intensely painful. The symptoms may include:
- A sharp, cramping sensation in the calf, thigh, or foot
- Muscle tightness or spasms
- The cramping lasting from a few seconds to several minutes
- Inability to move or stretch the muscle during the cramp
These cramps can occur at any time but are most common at night or after physical exertion.
What Does Magnesium Have to Do With Muscle Function?
Magnesium is an essential mineral that participates in many processes throughout the body, including normal muscle and nerve function.
Because magnesium is involved in muscle contraction and nerve signaling, it is reasonable to consider magnesium status when evaluating muscle symptoms. However, this does not mean that magnesium supplementation will prevent or relieve leg cramps in everyone.
Research on magnesium for muscle cramps has produced mixed results. A Cochrane review found that magnesium was unlikely to provide a clinically meaningful reduction in idiopathic muscle cramps in older adults. Evidence for pregnancy-associated cramps was less certain and inconsistent.
Bottom line: Magnesium is important for normal muscle function, but it should not be presented as a guaranteed treatment for leg cramps.
For more information on the types of magnesium supplements and their benefits, visit our Magnesium Supplement Resources.
Here are the top 5 magnesium supplements to help relieve leg cramps and promote overall muscle health:
Top 5 Best Magnesium for Leg Cramps
Top 5 Best Magnesium for Leg Cramps
1. Doctor's Best High Absorption Magnesium
Best for: A chelated magnesium tablet
- Doctor’s Best High Absorption Magnesium provides 200 mg of magnesium per serving from magnesium lysinate glycinate. The product is supplied as tablets and uses Albion’s TRAACS chelate technology.
Key features:
- 200 mg magnesium per serving
- Magnesium lysinate glycinate
- Tablet format
- 240-count bottle
- Vegan
- Chelated magnesium formula
Why It’s Great:
This product may appeal to people who prefer a tablet rather than a powder or softgel and specifically want a chelated magnesium formula.
2. Natural Vitality CALM Magnesium Citrate Powder
Best for: People who prefer a drink mix
- Natural Vitality CALM is a powdered magnesium citrate supplement that is mixed with water. The current manufacturer information lists 325 mg of magnesium per serving and identifies the magnesium as ionic magnesium citrate when mixed with water.
Key features:
- 325 mg magnesium per serving
- Magnesium citrate
- Powdered drink mix
- Mixes with water
- Vegan
- Gluten-free
- Non-GMO
- Available in multiple flavors
Why It’s Great:
A drink mix may be more convenient for people who don’t enjoy swallowing capsules or tablets.
Magnesium citrate can also have a laxative effect in some people, so anyone who is sensitive to gastrointestinal effects should pay attention to how their body responds.
3. Moon Juice Magnesi-Om Magnesium Powder
Best for: A flavored multi-form magnesium powder
- Moon Juice Magnesi-Om is a powdered magnesium supplement that combines magnesium gluconate, magnesium acetyl taurinate, and magnesium citrate, along with L-theanine. The manufacturer’s current product information lists 310 mg of magnesium per teaspoon serving.
Key features:
- Powder format
- 310 mg magnesium per serving
- Magnesium gluconate
- Magnesium acetyl taurinate
- Magnesium citrate
- Contains L-theanine
- Berry flavor
- Vegan
- Non-GMO
- Sugar-free
Why It’s Great:
This product may appeal to people who prefer a flavored drink rather than capsules or tablets and want a formula containing multiple forms of magnesium.
However, the fact that it contains multiple forms does not mean it is necessarily more effective for leg cramps.
4. Pure Encapsulations Magnesium Glycinate
Best for: A simple magnesium glycinate formula
- Pure Encapsulations Magnesium Glycinate provides 120 mg of magnesium per capsule. The product uses magnesium glycinate and comes in a vegetarian capsule.
Key features:
- 120 mg magnesium per capsule
- Magnesium glycinate
- Vegetarian capsule
- Gluten-free
- Non-GMO
- Simple formulation
- Available in 90-count and other bottle sizes
Why It’s Great:
This may be a good option for someone specifically looking for magnesium glycinate in capsule form and who prefers a relatively simple ingredient list.
Because the amount per capsule is 120 mg, shoppers should pay attention to the serving instructions and their total magnesium intake from all sources.
5. Nature Made Magnesium Citrate Softgels
Best for: A straightforward magnesium citrate softgel
- Nature Made’s Magnesium Citrate Softgels provide 250 mg of magnesium per serving from magnesium citrate, with a serving size of two softgels. The manufacturer states that the product is gluten-free and contains no artificial flavors or synthetic dyes.
Key features:
- 250 mg magnesium per serving
- Magnesium citrate
- Two softgels per serving
- Gluten-free
- No artificial flavors
- No synthetic dyes
- Softgel format
Why It’s Great:
This is a straightforward option for shoppers who prefer a conventional softgel rather than a powder or tablet.
As with other magnesium supplements, the appropriate choice depends on the individual’s dietary intake, tolerance, health circumstances, and reason for supplementation.
Which Type of Magnesium Is Best for Leg Cramps?
There isn’t enough evidence to say that one form of magnesium is universally the best magnesium for leg cramps.
Common forms found in supplements include magnesium glycinate and magnesium citrate. The choice between them can depend on the product’s dose, serving size, other ingredients, dietary preferences, and how well you tolerate the supplement.
Magnesium Glycinate
Magnesium glycinate is magnesium bound to the amino acid glycine and is commonly found in capsules and other supplements.
It may be appealing to people who want a magnesium supplement without the stronger gastrointestinal effects that some other magnesium products can cause.
People who prefer magnesium glycinate and a capsule format.
Magnesium Citrate
Magnesium citrate is another commonly used form of supplemental magnesium.
It is found in products such as Natural Vitality CALM and Nature Made Magnesium Citrate. Magnesium citrate can have a laxative effect, so it may not be ideal for people who are sensitive to gastrointestinal side effects.
People who prefer magnesium citrate and don’t mind a powder or softgel format.
Multi-form Magnesium
Some products combine multiple magnesium forms. Moon Juice Magnesi-Om, for example, combines magnesium gluconate, acetyl taurinate, and citrate.
A multi-form formula isn’t automatically better for leg cramps, but it may appeal to shoppers who prefer that type of formulation.
People who prefer a supplement containing multiple forms of magnesium.
While different magnesium forms have different characteristics, there is not enough evidence to conclude that one specific form is superior to another for preventing or treating ordinary leg cramps.
Does Magnesium Actually Help Leg Cramps?
Magnesium is often marketed as a supplement for leg cramps, but the evidence does not support a simple conclusion that magnesium prevents or treats all leg cramps.
A Cochrane review found that magnesium was unlikely to provide clinically meaningful prevention of idiopathic muscle cramps in older adults. Evidence involving pregnancy-associated cramps was inconsistent, and there was not enough evidence to determine whether magnesium helps exercise-associated cramps.
If a person has a confirmed magnesium deficiency, addressing that deficiency may be appropriate. However, people with frequent or unexplained leg cramps should also consider other possible causes and speak with a healthcare professional when appropriate.
How Much Magnesium Should You Take?
There is no single magnesium dose specifically established as the correct dose for leg cramps.
The recommended dietary allowance for magnesium varies according to age and sex. For adults, recommended intake is generally 310–320 mg per day for women and 400–420 mg per day for men, including magnesium from food and other sources.
The upper limit for magnesium from dietary supplements and medications is 350 mg per day for adults unless a healthcare professional recommends otherwise. This limit does not include magnesium naturally present in food.
Because individual needs vary, don’t use the product list in this article as a personalized dosing recommendation. Follow the product label and speak with a healthcare professional if you are unsure how much magnesium is appropriate for you.
When Should You Take Magnesium?
There isn’t strong evidence that taking magnesium at a particular time of day will prevent leg cramps.
If you use a magnesium supplement, follow the manufacturer’s serving instructions. Taking magnesium with food may also be preferable if you experience stomach discomfort.
Avoid increasing the dose simply because your cramps continue. Persistent cramps may have causes that aren’t related to magnesium.
Magnesium Supplement Safety
Magnesium supplements can cause gastrointestinal side effects such as diarrhea, nausea, and abdominal cramping, particularly at higher supplemental intakes.
Magnesium can also interact with some medications, including certain antibiotics and bisphosphonates. People with impaired kidney function may also be at greater risk of excessive magnesium levels because the kidneys normally remove excess magnesium.
Speak with a healthcare professional before taking magnesium supplements if you:
Have kidney disease
- Take prescription medications
- Are pregnant or breastfeeding
- Have frequent or unexplained muscle cramps
- Are considering a high-dose magnesium supplement
For more information on magnesium supplements and how to choose the right one for you, visit our Best Magnesium Supplements page.
Frequently Asked Questions
Quick answers to common questions about magnesium, leg cramps, dosage, safety, and choosing between different magnesium forms.
What is the best magnesium for leg cramps?
There is no single magnesium supplement that has been proven to be the best for all leg cramps. Magnesium glycinate and magnesium citrate are common supplement forms, but evidence that magnesium prevents or treats routine leg cramps is limited and varies depending on the cause of the cramps.
Can magnesium stop leg cramps?
Magnesium is important for normal muscle function, but supplementation does not reliably stop or prevent leg cramps in everyone. Research has not established magnesium as a universally effective treatment for leg cramps.
How much magnesium should I take for leg cramps?
There is no universally established dose specifically for leg cramps. Follow the product’s label and consider your total magnesium intake from food, supplements, and medications. Adults should generally not exceed 350 mg per day from supplements and medications unless advised by a healthcare professional.
Is magnesium glycinate better than magnesium citrate for leg cramps?
There isn’t enough evidence to say that magnesium glycinate is universally better than magnesium citrate for leg cramps. The two forms also differ in formulation and gastrointestinal effects, so the better choice may depend on the individual.
Can magnesium cause diarrhea?
Yes. Magnesium supplements can cause diarrhea, nausea, and abdominal cramping, particularly at higher supplemental intakes.
Can I take magnesium during pregnancy for leg cramps?
Pregnancy-associated leg cramps are different from typical nighttime cramps, and research on magnesium during pregnancy has produced inconsistent results. If you’re pregnant and experiencing leg cramps, discuss supplementation with your healthcare professional rather than choosing a dose based solely on an online article.
When should I see a doctor about leg cramps?
Speak with a healthcare professional if cramps are frequent, severe, persistent, interfere with sleep or daily activities, or occur with symptoms such as swelling, weakness, numbness, or other concerning changes.
Choosing Magnesium for Leg Cramps
Magnesium is an essential mineral involved in normal muscle and nerve function, but it isn’t a guaranteed solution for leg cramps.
If you’re considering a magnesium supplement, compare the magnesium form, amount per serving, serving size, ingredients, format, and potential side effects rather than choosing a product based only on its magnesium content.
The five products in this guide offer different formats and formulations, including magnesium glycinate, magnesium citrate, and multi-form magnesium products.
Persistent or unexplained leg cramps deserve attention beyond supplementation. If your cramps continue, consider discussing possible causes and treatment options with a healthcare professional.