Magnesium is often called the “master mineral”, and for good reason. This unsung hero is involved in over 300 vital processes in the body, from helping our muscles move and relax and nerves fire, to keeping our hearts beating steadily and our energy levels up. Think of it as a crucial helper for nearly every system.

While magnesium is abundant in foods like leafy greens, nuts, seeds and whole grains, it’s becoming difficult to get enough of it through diet alone due to widespread soil depletion. That’s where magnesium supplements come in. But here’s the catch: Not all magnesium supplements are created equal. Different forms are absorbed differently and offer unique benefits.

Magnesium’s Essential Roles in Our Bodies

Before diving into specific types, it’s helpful to remember magnesium’s broad impact: It helps convert food into the energy the cells need. Magnesium is crucial for muscle contraction and relaxation and for sending nerve signals. It helps maintain a steady heartbeat and healthy blood pressure, and contributes to strong bones and helps regulate calcium. Magnesium has a role in how the body uses insulin, helps calm the nervous system and supports restful sleep.

Meet the Magnesium Family

The way magnesium is “packaged” (bound to other compounds) affects how well the body absorbs it and what it’s best used for.

     Magnesium Citrate is used for occasional constipation and bowel preparation. It draws water into the intestines to soften stools and encourage bowel movements. It can cause diarrhea, especially in high doses.

     Magnesium Glycinate promotes relaxation, improve sleep quality and reduces anxiety and stress. It’s highly absorbable and gentle on the stomach. The glycine component has calming effects on the nervous system, helping with GABA production and melatonin regulation. It’s generally well-tolerated with minimal digestive side effects.

     Magnesium L-Threonate is best for brain health, memory, learning and cognitive functions. It crosses the blood-brain-barrier, increasing magnesium levels directly in the brain to support natural connections and reduce inflammation. This form of magnesium is specially designed to target brain function.

     Magnesium Chloride is used in bath salts or topical oils for muscle soreness. Topically, it’s absorbed through hair follicles.

     Magnesium Sulfate (Epsom Salt) is helpful to soothe aching muscles when used in the bath or foot soaks. In baths, it’s used to relax muscles. Oral absorption is low; topical absorption from baths is limited.

     Magnesium Hydroxide is used for occasional constipation and as an antacid for heartburn and upset stomach. It neutralizes stomach acid and draws water into the intestines to soften stool.  Systemic absorption is limited and can cause diarrhea.

Important Considerations

Always consult a healthcare professional before starting any new supplement, especially if one has existing health conditions (like kidney issues) or is taking medications. Magnesium can interact with certain drugs, including antibiotics, diuretics and bisphosphonates.

The “elemental magnesium” listed on a supplement label doesn’t tell the whole story. How well the body absorbs that magnesium (its bioavailability) is key. Organic forms (like citrate, glycinate and malate) are generally better absorbed than inorganic forms (like oxide and sulfate).

While generally safe, high doses of magnesium supplements can cause digestive issues like diarrhea, nausea and stomach cramps.

By understanding the different forms of magnesium and their unique properties, making an informed choice to support health and well-being is easier.

Dr. Gary Kracoff is a registered pharmacist with a degree in natural medicine at the Johnson Compounding and Wellness Center, at 577 Main St., Waltham, MA. Consultations with their professional pharmacists and dieticians are also offered. For more information, call 781-893-3870 ext. 2, email [email protected] or visit NaturalCompounder.com.