Magnesium RBC Blood Test - Dr. Carolyn Dean MD ND

Magnesium RBC Blood Test

May 31, 2014

In the first edition of The Magnesium Miracle I promoted the Ionized Magnesium Blood Test as the most accurate recording of the magnesium levels in your cells. I thought by now, in 2019, this test would be available to the public. But it’s not; it was a research tool back in the 1990s and it still is.

I knew it was hopeless back in 2013 and I began promoting the Magnesium RBC test in my 2014 updated Magnesium Miracle book as the second best test to determine levels. However, it’s been an uphill battle to explain it to my customers for many reasons.

A lab test Magnesium RBC for the levels in a population that is already 80% deficient in magnesium. Thus the results they get are not “normal” and not “optimal.” In The Magnesium Miracle, I point this out in detail. I say that if the range in the labs is 4.2-6.8mg/dL, you want to be at least 6.0-6.5mg/dL up in the 80th percentile.

A few years ago some labs began reporting a new range for Magnesium RBC: 3.9-5.8mg/dL. One client was told by her doctor that her level of 3.8mg/dL was quite acceptable because it was so close to the range! Here is a woman, with heart palpitations, twitching, insomnia, headaches, fatigue, anxiety, high blood sugar, high cholesterol and high blood pressure – all symptoms of magnesium deficiency – being told her magnesium is just fine!

Lord Suffering Cats! Sometimes I don’t feel like we are making any progress at all in trying to educate the public about this epidemic of magnesium deficiency? But at least the folks reading my blogs are using magnesium and saving their lives!!

There a few positive things to report in this drama. The first is that you can order your own Magnesium RBC blood test without a doctor’s prescription (except in a few states). The company is Request A Test, the price is $49.00. With your zip code they line you up with a local blood draw lab and you get your results back within 72 hours.

Another positive is when a testimonial like the following comes along which makes me hopeful again. It’s from a doctor whose life has been changed forever with magnesium.

“I am 63, white male. I run 2-4 miles a day and I sweat a lot. I am 90% gluten free and i eat a high protein diet. I used to take 5000 + mg of Vit D a day during the winter. I have a relatively high stress job in a medical practice.

Up until a week ago I was having night heart palpitations that would either start when I lay down, or wake me up in the middle of the night, and they would last from 30 – 60 minutes.

They were driving me nuts. The first time a year ago when it happened I drove myself to the ER, they told me it was just Premature Atrial Contractions (PAC’s) and sent me to a cardiologist, and you know the rest.

I didn’t do all the Holter Monitor or all the other testing because they were so infrequent. Then they got more frequent and happened every night the last two weeks (a week ago).

I had had enough, I read everything on the internet on heart palpitations, and I found your website. Thank goodness I found it. I got your book, and the information on too much Vit D, excessive sweating, a high protein diet, chronic stress, and how they all cause magnesium deficiency. All this opened my eyes. I quit the Vit D and ate every nut, seed, spinach leaf I could find, and just took 200mg of magnesium twice a day and 48 hours later I have not had a palpitation, going on 6-7 nights.

PLUS, I had always felt anxious, never felt calm, and that would drive me nuts. I would do deep breathing all the time trying to relax. But on the magnesium, I feel calm now. It feels great.

I went yesterday and got a Magnesium RBC blood test, I am curious to see if I can get to 6.0.


I recommended that this doctor take ReMag and also ReMyte because when you sweat out magnesium, you are also going to lose other minerals like potassium, zinc, iodine and selenium Potassium is important for the adrenal glands, zinc for the prostate and wound healing and iodine and selenium for the thyroid. You can download free copies of my Atrial Fibrillation: ReMineralize Your Heart, ReMag, and ReMyte books.

Carolyn Dean MD ND

The Doctor of the Future®

RESOURCES: Along the borders and in the links of my web site you can find my books, writings, and my call-in radio show. Email your questions to:

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