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Product Review: Magnesium and Calcium-Magnesium Supplements Review
 

Initial Posting: 6/3/17 Last Update: 9/23/17
Magnesium Supplements Reviewed By ConsumerLab.com How to Choose the Best Magnesium Supplement? ConsumerLab Reveals Its Top Picks

Tests and Reviews of 40+ Popular Supplements, Including Combinations with Calcium, Vitamin D and Vitamin K

Magnesium  supplements in this review
AdvoCare Calcium Plus Life Extension Magnesium Caps Puritan's Pride High Potency Magnesium 500 mg
AlgaeCal Plus MAGINEX Advanced Magnesium ReMag Magnesium Solution
Bluebonnet EarthSweet Chewables Calcium Magnesium & D3 Mag-Tab SR Rexall Magnesium
Caltrate 600 + D3 Metagenics CalApatite Bone Builder With Magnesium Solgar Magnesium Citrate
ChildLife Liquid Calcium With Magnesium Natural Factors Magnesium Oxide Spring Valley [Walmart] Magnesium Citrate
Country Life Target-Mins Calcium Magnesium Natural Vitality Natural Calm Sundown Naturals Calcium Magnesium and Zinc
Doctor's Best High Absorption 100% Chelated Magnesium Nature's Bounty Calcium Magnesium Zinc Sundown Naturals® Magnesium
Douglas Laboratories Magnesium Taurate Nature's Bounty Magnesium Swanson Liquid Calcium & Magnesium
Dr. Mercola Magnesium L-Threonate Nature's Life Magnesium Malate Trace Minerals Research Magnesium
Finest Nutrition [Walgreens] Calcium, Magnesium & Zinc Nature's Plus Animal Parade® Mag Kidz TwinLab Magnesium Caps
Finest Nutrition [Walgreens] Magnesium Nature's Way Alive Calcium Bone Formula USANA® MagneCal
Finest Nutrition [Walgreens] Magnesium 400 mg NOW Magnesium Caps Vitacost® Magnesium Citrate
Jarrow Formulas Bone-Up NutriCology Magnesium Chloride Liquid Vital Nutrients Triple Mag
Jarrow Formulas Magnesium Optimizer Piping Rock.com Magnesium Chloride Vitamin World Calcium Magnesium Zinc
KAL Magnesium Glycinate Pure Encapsulations OsteoBalance Vitamin World® High Potency® Magnesium
Kirkland Signature [Costco] Calcium Citrate Magnesium And Zinc Puritan's Pride Chelated Calcium Magnesium Zinc Wellesse Calcium & Vitamin D3
AdvoCare Calcium Plus AlgaeCal Plus Bluebonnet EarthSweet  Chewables Calcium Magnesium & D3 Caltrate 600 + D3 ChildLife Liquid Calcium With Magnesium Country Life Target-Mins Calcium Magnesium Doctor's Best High Absorption 100% Chelated Magnesium Douglas Laboratories Magnesium Taurate Dr. Mercola Magnesium L-Threonate Finest Nutrition [Walgreens] Calcium, Magnesium & Zinc Finest Nutrition [Walgreens] Magnesium Finest Nutrition [Walgreens] Magnesium 400 mg Jarrow Formulas Bone-Up Jarrow Formulas Magnesium Optimizer KAL Magnesium Glycinate Kirkland Signature [Costco] Calcium Citrate Magnesium And Zinc Life Extension Magnesium Caps MAGINEX Advanced Magnesium Mag-Tab SR Metagenics CalApatite Bone Builder With Magnesium Natural Factors Magnesium Oxide Natural Vitality Natural Calm Nature's Bounty Calcium Magnesium Zinc Nature's Life Magnesium Malate Nature's Plus Animal Parade® Mag Kidz Nature's Way Alive Calcium Bone Formula NOW Magnesium Caps NutriCology Magnesium Chloride Liquid Piping Rock.com Magnesium Chloride Pure Encapsulations OsteoBalance ReMag Magnesium Solution Rexall Magnesium Solgar Magnesium Citrate Spring Valley [Walmart] Magnesium Citrate Swanson Liquid Calcium & Magnesium Trace Minerals Research Magnesium TwinLab Magnesium Caps USANA® MagneCal Vitacost® Magnesium Citrate Vital Nutrients Triple Mag Vitamin World Calcium Magnesium Zinc Vitamin World® High Potency® Magnesium Wellesse Calcium & Vitamin D3
Make sure the magnesium supplement you take passed our quality review and is right for you!
Isn't your health worth it?
Magnesium supplements are available in so many different forms, dosages and ingredient combinations, how do you know which one is best for you?

To answer these questions, ConsumerLab.com staff spent several months testing of over 40 popular magnesium supplements on the market (including combination products with calcium, vitamin D or vitamin K). Our tests revealed that several contained less magnesium than claimed, took longer than normally expected to break apart in disintegration testing, were contaminated with lead, or were improperly labeled. We also found that one type of magnesium supplement rapidly absorbs so much water from the air that it damages tablets and other supplements which may be nearby.
 
Fortunately, we also identified many high quality magnesium supplements that contained what they claimed and passed all of CL's tests — some of which provide a good dose of magnesium for just a few cents per day.

You must become a ConsumerLab.com member to get the full test results for magnesium supplements, including quality ratings and CL's Top Picks among magnesium supplements. You will get results for 43 magnesium supplements: 27 selected for testing by ConsumerLab.com and 16 others that passed the same tests through CL's voluntary Quality Certification Program, as well as information about five supplements similar to ones that passed testing.

Although most people get enough magnesium in their diets, people with diabetes, diseases of the digestive tract, and those who use medications such as Nexium and Prilosec may be at increased risk of deficiency. Magnesium supplementation may also improve glucose status in people with pre-diabetes, and may be helpful for restless leg syndrome, migraines and menstrual pain. It is also an effective laxative and antacid. However, it's important to choose supplements carefully based on your needs, as certain forms of magnesium forms are better absorbed than others or are more likely to cause diarrhea.

In this comprehensive report, you'll discover:
    • Which magnesium failed our quality ratings and which passed — including combinations with calcium, vitamin D and vitamin K
    • CL's Top Picks among the best magnesium supplements
    • Cost comparisons to help you choose a magnesium supplement offering the best value
    • The pros and cons of different forms of magnesium, including magnesium aspartate and orotate, magnesium citrate, magnesium chloride, magnesium lactate and lactate dihydrate, magnesium oxide and magnesium-L-threonate
    • How to get adequate magnesium from food
    • The causes and symptoms of magnesium deficiency
    • How much magnesium to take to treat or prevent magnesium deficiency and other conditions/li>
    • The evidence for and against using magnesium supplements for restless leg syndrome, leg cramps, migraines and more
    • Potential drug interactions and side-effects of magnesium supplements

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ConsumerLab.com Answers -- for Magnesium and Calcium-Magnesium Supplements Review
Question:
Some websites are highly critical of magnesium stearate, which is in many supplements. Is this substance toxic and should I avoid it? Get the answer >>

Question:
I've been buying nutritional supplements in powder form, as I find them cheaper than tablets and capsules. I am concerned about the effect of air when I open the bottles daily because sometimes my powdered supplements get clumpy. Should I be concerned? Get the answer >>

Question:
What is the benefit of magnesium orotate compared to other forms of magnesium? Get the answer >>

Question:
Are supplements with amino acid chelated minerals better than those with other forms of minerals? Get the answer >>

Question:
Are enterically coated supplements better than non-enterically coated ones? Get the answer >>

Question:
Do magnesium supplements, like Magtein, help memory or protect against Alzheimer's disease? Get the answer >>

Question:
Can taking certain forms of potassium, such as potassium citrate, reduce my chances of getting kidney stones? I've read a study that says it can, but it's unclear how much I should take. Get the answer >>

Question:
Do any supplements help with migraines? Get the answer >>

Question:
I have low blood pressure. Are there any supplements I should avoid? Get the answer >>

Question:
Which is the best form of magnesium to take - one that contains the most magnesium and is best absorbed? Get the answer >>

Question:
How can the Recommended Daily Allowance (RDA) for magnesium be higher than the Upper Tolerable Intake Level (UL)? That is, how can an amount which is healthful also put you at risk for harm? Get the answer >>

Question:
Is it important to take calcium and magnesium together? Get the answer >>

Question:
Do any supplements help for irritable bowel syndrome (IBS)? Get the answer >>

Question:
Are there negative interactions between the following supplements I take twice each day, as well as 60 mg of beta-sitosterol with dinner: Vitamin C (500 mg), CoQ10 (100 mg), grape seed extract (100 mg), fish oil (500 mg), vitamin D3/calcium/magnesium/zinc (200 IU/333 mg/113 mg/5mg)? Get the answer >>

Question:
Help! How do I know how much magnesium I am actually getting from my supplement? The label says it contains 500 mg of magnesium "as magnesium citrate" -- but how much of that is magnesium and how much is citrate? Get the answer >>

Question:
Which supplements reduce the risk of stroke? Which increase the risk of stroke? Get the answer >>

Question:
Which supplements can help with indigestion and/or heartburn? Get the answer >>

Question:
What is Prelief? Does it really help for heartburn and/or bladder pain from acidic foods? Get the answer >>

Question:
Is there an accurate test for magnesium deficiency? Get the answer >>

Question:
Are the "% DV" numbers on vitamin supplement labels really based on what I need? Get the answer >>

Question:
Are there any supplements I should avoid when taking an antibiotic? Are there any that may be helpful? Get the answer >>

Question:
Which supplements can help treat constipation? Get the answer >>

Question:
Which supplements can cause diarrhea? Get the answer >>

Question:
Are there drug interactions with magnesium supplements? Get the answer >>

Question:
Do any supplements help for restless legs syndrome? Get the answer >>

Question:
Is it true that I should not keep magnesium supplements in a daily pill pack mixed with other supplements and medicines? Get the answer >>

Question:
Do any supplements help for ulcerative colitis? Get the answer >>

Question:
Do any supplements help reduce the symptoms of premenstrual syndrome (PMS)? Get the answer >>
Update:
(7/11/17): A company selling one of the products covered in this Review was recently sent a Warning Letter from FDA indicating that the product is being marketed online with claims regarding its ability to cure, prevent, or treat diseases, and this is not permitted for a supplement. For details, see the "Update" at the top of the full Review.
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