Magnesium, What a Hot Topic These Days!

Magnesium seems to be quite a hot topic today in the supplement field, and the field of health and wellness!  I have been poking some and  want to share some of the information with you all about what exactly Magnesium is, what is does, where you can find sources of this mineral, who is at risk to be deficient, and what some of the signs or symptoms are…

Magnesium is a mineral, for those of you that are not familiar.  Magnesium is also a cofactor in relation to over 300 enzyme systems that control complex biochemical reactions throughout the body (a little more technical them some of you probably care to know, but have to throw a little of the science and medical part in here and there too).   Muscle and nerve function, regulation of blood pressure, blood glucose control, energy production, protein synthesis, transporting calcium and potassium across cell membranes, bone structural development, and synthesis of DNA/RNA, are some of the most important reactions Magnesium helps to regulate.  I honestly didn’t realize that Magnesium contributed to ALL of these things plus more, until I started digging around for more information.

The balance of Magnesium in greatly controlled by the kidneys.  The kidney excretes around 120mg of magnesium into the urine each day. There is about 25g of magnesium in the adult body, and over have of it resides in the bones and the rest in the soft tissue (muscles, tendons, fascia, etc).  There is only a very small amount of magnesium that resides in the actual blood serum.  With that being said, it can be a little more difficult to test, and usually a combination of blood tests, urinalysis, saliva tests, and a thorough consultation are performed to be sure if one is deficient or not.

There are a wide variety of beverages, animal and plant foods that have magnesium in them.  Tap, mineral and bottled water contain certain levels of magnesium in them.  Nuts, seeds, spinach, legumes, and whole grains contain a good level of magnesium as well.  Fortified foods and cereals may contain added amounts of magnesium, but some types of food processing actually lower the content of magnesium.  Personally, I recommend trying to find magnesium through more natural food sources, not cereal or processed foods if can be helped.  And though you may think you are taking in a fair amount of magnesium in through your diet, only about 30-40% of dietary magnesium is actually absorbed by the body.

Listed below from The National Institute of Health are some food sources and the levels of magnesium found in them:

Table 2: Selected Food Sources of Magnesium [10]
Food Milligrams
(mg) per
Almonds, dry roasted, 1 ounce 80 20
Spinach, boiled, ½ cup 78 20
Cashews, dry roasted, 1 ounce 74 19
Peanuts, oil roasted, ¼ cup 63 16
Cereal, shredded wheat, 2 large biscuits 61 15
Soymilk, plain or vanilla, 1 cup 61 15
Black beans, cooked, ½ cup 60 15
Edamame, shelled, cooked, ½ cup 50 13
Peanut butter, smooth, 2 tablespoons 49 12
Bread, whole wheat, 2 slices 46 12
Avocado, cubed, 1 cup 44 11
Potato, baked with skin, 3.5 ounces 43 11
Rice, brown, cooked, ½ cup 42 11
Yogurt, plain, low fat, 8 ounces 42 11
Breakfast cereals, fortified with 10% of the DV for magnesium 40 10
Oatmeal, instant, 1 packet 36 9
Kidney beans, canned, ½ cup 35 9
Banana, 1 medium 32 8
Salmon, Atlantic, farmed, cooked, 3 ounces 26 7
Milk, 1 cup 24–27 6–7
Halibut, cooked, 3 ounces 24 6
Raisins, ½ cup 23 6
Chicken breast, roasted, 3 ounces 22 6
Beef, ground, 90% lean, pan broiled, 3 ounces 20 5
Broccoli, chopped and cooked, ½ cup 12 3
Rice, white, cooked, ½ cup 10 3
Apple, 1 medium 9 2
Carrot, raw, 1 medium 7 2

The National Institute of Health also states that the daily recommended amount of magnesium consumed by an adult be between 310-420mg per female and male, respectively.  Now this may vary between each individual based on their health history and daily life.  It is always recommended that if one is concerned to please consult a qualified health care professional.  Keep in mind that if you are getting enough Magnesium in through natural food sources that one may not need to take a supplement, or as high of a dose.  I do manage to take in a good amount of Magnesium naturally, so I usually take one, or maybe two tablets of the Metagenics Magnesium per day.  It seems to be very gentle on my stomach, and I prefer to take my Magnesium towards the end of the day.  There are properties that are supposed to help relax the muscles and the body, and I figure I can use all the help I can get before bedtime.

Some groups that are more subject than others to have inadequate levels of magnesium are people with gastrointestinal diseases, people with migraines, people with Type II Diabetes, people with alcohol dependencies, older adults, especially those dealing with osteoporosis, and people with hypertension and/or cardiovascular disease.  These groups are more likely to consume insufficient quantities of magnesium, or have a medical condition or take medications that affect the absorption of magnesium in the gut in general.

Some signs that you are someone may be deficient in magnesium include, but are not subject to: reduced urinary excretion, nausea, vomiting, weakness, fatigue, loss of appetite.  If the deficiency continues to get worse, numbness, tingling, muscle contractions, cramps, personality changes, seizures, irregular heart rhythms or coronary spasms can take place.  Severe issues can involve low blood calcium and potassium levels as well.

I hope that this has been informative to all of you reading this.  Should you have any questions or concerns in regards to magnesium, please feel free to contact any of the doctor’s at PHC or your PCP for further questions or concerns, or email me at any time, .  If you are someone that takes a magnesium supplement, or is looking too, Metagenics carries very high quality magnesium supplements, some of which we carry at our office that include Calcium in them as well for better absorption.  The Metagenics brand is very well known in the medical field and among health care practitioners, and can be found in many of health care providers offices.