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Product Review: Magnesium and Calcium-Magnesium Supplements Review

Initial Posting: 6/6/15  Last Update: 2/28/17
Magnesium Supplements Reviewed By Identifies Best Quality Magnesium Supplements and Shows How to Choose the Right Type

Avoid Magnesium Supplements with Problems!

Magnesium and calcium/magnesium supplements in this review
Bayer Citracal Slow Release 1200 Jarrow Formulas MagMind Pure Encapsulations Magnesium (Glycinate)
The Vitamin Shoppe Calm Zone Magnesium Jigsaw Health Magnesium w/SRT Rainbow Light Food Based Calcium
Caltrate 600+D Plus Minerals Kirkland Signature [Costco] Calcium Citrate Magnesium And Zinc ReMag Magnesium Solution
Cardiovascular Research Ltd. Magnesium Taurate Kirkland Signature [Costco] Magnesium Citrate Rexall Magnesium
Carlson Chelated Magnesium LifeExtension Magnesium Caps Shaklee Osteomatrix
ChildLife Liquid Calcium With Magnesium Nature Made Calcium Magnesium Zinc Solgar Magnesium Citrate
Country Life Bone Solid Nature Made Magnesium Source Naturals Magnesium Malate
Doctor's Best High Absorption 100% Chelated Magnesium Nature's Bounty High Potency Magnesium Spring Valley [Walmart] Magnesium Citrate
Finest Nutrition [Walgreens] Magnesium Nature's Way Alive Calcium Bone Formula Trace Minerals Research ConcenTrace
GNC Calcium Plus 1000 NutriCology Magnesium Chloride Liquid TwinLab Magnesium Caps
GNC Magnesium 500 Nutrilite Cal Mag D Advanced USANA Active Calcium
GNC Super Magnesium Magnesium Chloride Vitacost Magnesium Ultra
Jarrow Formulas Bone-Up    
Make sure the magnesium supplement you take passed our quality review and is right for you!
Isn't your health worth it?
How do you choose the best magnesium supplement? tested and reviewed many popular brands of magnesium and calcium magnesium supplements to help you avoid problems. One popular product contained only 61.5% of its listed magnesium. Two supplements which each contained magnesium in combination with other ingredients also failed testing — one had much less vitamin K than claimed and other contained nearly double its listed amount of vitamin D. Fortunately, many other supplements were found to contain the magnesium they claimed, were free of heavy metal contamination (which can occur in mineral supplements), and, if tablets, were able to properly break apart. then compared the magnesium supplements on cost, to help you find the best price and value. It found the cost to get an equivalent amount of magnesium ranged from 2 cents to well over $1. But cost didn't coincide with quality -- some very high quality magnesium supplements were identified that cost only pennies a day.
You also need to be aware that many forms of magnesium are used in supplements and some have been shown to be better absorbed than others or more likely to cause diarrhea -- a common side-effect. provides you with this information and factors it into its review of magnesium products.

In this comprehensive report about magnesium and calcium-magnesium supplements, you'll get test results and quality ratings for 37 supplements (including 19 that passed our voluntary Quality Certification Program) and information about two other products similar to those tested. You'll learn:
    • Which magnesium and calcium-magnesium supplements passed or failed's testing and review
    • Quality ratings and comparisons of magnesium supplements
    • Important differences among forms of magnesium (e.g., magnesium aspartate and orotate, magnesium citrate, magnesium chloride, magnesium lactate and lactate dihydrate, and magnesium oxide)
    • Which foods are rich in magnesium 
    • The causes and symptoms of magnesium deficiency
    • The dosage of magnesium generally used in treating and preventing magnesium deficiency and other conditions, such as migraines and restless leg syndrome
    • Potential side-effects of magnesium supplements
    • And more! 

If you already are a member, SIGN IN now. Answers -- for Magnesium and Calcium-Magnesium Supplements Review
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 >>

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 >>

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

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

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

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

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 >>

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

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

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

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 >>

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

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

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 >>

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 >>

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

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

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

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

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

Is it true that I should not keep magnesium supplements in a daily pill pack mixed with other supplements and medicines? Get the answer >>
(1/24/16): A company which sells one of the products which was "Not Approved" in this review has disseminated false and misleading information about its product and For more information, see the Update in the full Review.

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