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Why Magnesium Levels Decline With Age & What To Do About It

Jennifer Chesak
Author:
June 01, 2024
Jennifer Chesak
By Jennifer Chesak
mbg Contributor
Jennifer Chesak is the author of "The Psilocybin Handbook for Women: How Magic Mushrooms, Psychedelic Therapy, and Microdosing Can Benefit Your Mental, Physical, and Spiritual Health." She is a Nashville-based freelance journalist, editor, fact-checker, and adjunct professor with two decades of experience and a Master of Science in Journalism from Northwestern University's Medill. Her byline appears in several national publications, including the Washington Post. Follow her on socials @jenchesak.
Image by Julia Volk / Stocksy
June 01, 2024

Magnesium is a vital mineral that's essential for numerous physiological functions in the body.

It contributes to maintaining healthy blood sugar and blood pressure levels, enhancing relaxation and sleep quality, balancing electrolytes, facilitating muscle and nerve transmission, aiding in the transport and effectiveness of other nutrients, and supporting the immune system.*

From our bones to the mitochondria within our cells, magnesium is crucial for our overall health.*

As a macromineral, our bodies require significant amounts of magnesium to operate efficiently. However, many people, especially as they age, do not get enough of this important nutrient.

Here, why magnesium levels decline as we age and what to do about it.

Why magnesium levels often decline with age

Getting enough magnesium through diet alone is challenging at any age. Soil depletion in farming has resulted in a steady decline of magnesium in the foods we eat. And food processing results in a loss of the mineral as well, according to a review in the journal Nutrients.

These days, over 40% of people in the United States don't get the recommended daily amount of magnesium1 through foods.

So what does aging have to do with it? "As a person ages, a big factor in their magnesium decline is that their appetite and [nutrition] intake also decline," explains Christina Fitzgerald, M.S., R.D., a registered dietitian and sports nutrition expert. "So they're taking in much less dietary magnesium."

Plus, aging involves a lot of changes within the body that can simultaneously (negatively) affect magnesium levels: According to functional registered dietitian Alex D'Elia, R.D., changes in urination, intestinal absorption, and bone health status are "three of the most common reasons magnesium insufficiency is seen in the aging population."

How to maintain healthy magnesium levels for life

1. Add a supplement

Even if you try your best, dietary changes might not be enough to sustain optimal magnesium levels—this is where a supplement can be useful.

D'Elia recommends supplementing with magnesium glycinate (also called bisglycinate), which has the added bonus of promoting quality sleep.*

There are many forms of magnesium available, but here are 16 that the mbg team has identified as high-quality.*

If you do take a supplement, follow the dosing instructions on the label and check with your physician to make sure it's safe and effective for you.

2. Check your magnesium status

Based on blood levels, 12 to 20% of people likely have hypomagnesemia (low magnesium). Even if you don't have a magnesium deficiency2 (defined as a serum magnesium level less than 0.75 mmol/L3) your body could still be lacking the right amount of this mineral.

As mbg's former vice president of scientific affairs, Ashley Jordan Ferira, Ph.D., RDN, explains, determining magnesium insufficiency from the blood isn't so straightforward. "Since serum (blood) magnesium levels are tightly regulated by your kidneys, and most magnesium is actually found intracellularly (aka, inside cells), serum magnesium tests often lie about actual magnesium status," Ferira shares.

Ferira goes on to say, "The serum magnesium lab test doesn't tell the full story for magnesium. A red blood cell magnesium test is considered more accurate." This fact underscores the importance of partnering with a nutrition-minded health care practitioner.

3. Change your diet

You can up your intake of this essential mineral by making a habit of eating more magnesium-rich foods. "Include a variety of sources daily, such as legumes, nuts, seeds, whole grains, and leafy veggies in addition to fortified cereals and milk and yogurts," Fitzgerald says. "These can easily be included in both meals and smoothies."

The takeaway

Our magnesium levels tend to decline with age for several reasons, including normal changes in the body.

Although we can always aim to eat more magnesium-rich foods to counteract low levels, getting enough of the mineral from diet alone is tough daily.

Taking a supplement can help support your body's magnesium count for better health at any age.*

If you are pregnant, breastfeeding, or taking medications, consult with your doctor before starting a supplement routine. It is always optimal to consult with a health care provider when considering what supplements are right for you.

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