Epsom Salt – To Soak or Not to Soak

Tom Wigginton • September 26, 2016
Epsom Salt – To Soak or Not to Soak

Epsom salt, named for a bitter saline spring at Epsom in Surrey, England, is not actually salt but a naturally occurring pure mineral compound of magnesium and sulfate. Long known as a natural remedy for a number of ailments, Epsom salt has numerous health benefits as well as many beauty, household, and gardening-related uses.


Studies have shown that magnesium and sulfate are both readily absorbed through the skin, making Epsom salt baths an easy and ideal way to enjoy the associated health benefits. Magnesium plays a number of roles in the body including regulating the activity of over 325 enzymes, reducing inflammation, helping muscle and nerve function, and helping to prevent artery hardening. Sulfates help improve the absorption of nutrients, flush toxins, and help ease migraine headaches. ~ SaltWorks

These are the first two paragraphs on a website that describes and embraces the virtues of epsom salt. (They also sell a variety of salts for cooking and therapeutic benefits.)

For several years, I’ve been enthusiastically recommending epsom salt (magnesium sulfate) baths and foot-soaking to relieve muscle aches and pains and to speed up recovery after a series of challenging workouts. My own experience supports the use of epsom salt but what does the critical scientific research say? I was surprised at the volume of information and the lack of a consensus.


At first I searched simply for the “benefits of epsom salt baths” on PubMed. It came back with no items found. Then I replaced epsom salt with magnesium sulfate. No items found. Then I searched just for magnesium sulfate. 8750 articles. Finally I narrowed it down and discovered some interesting stuff.


As background, magnesium plays a critical role in health and core bodily functions. Essentially, it’s a calcium antagonist which, in very simple terms, means that where calcium helps muscles contract, magnesium helps them relax. When the two are out of balance, one can experience a wide variety of issues ranging from minor muscle cramps to very serious cardiac and nervous disorders. Magnesium is also vital to the structural function of proteins and mitochondria, and plays a role insulin secretion. Magnesium intake is commonly inadequate in the western diet plus we sweat it out when we work out. This is why we should be concerned.


Reading on, I discovered that magnesium has been widely studied for a number of conditions including inflammation, preeclampsia and other pregnancy related health concerns, asthma, heart attacks, menstrual pain, migraines and constipation. The delivery of magnesium for all these issues is interesting. Administering magnesium intravenously and orally is used most frequently. There are some calls for magnesium sulfate to be made into a paste and applied to affected areas with a gauze wrap.


But soaking one’s body in a solution of magnesium sulfate (at any concentration) doesn’t seem to be supported in the research. When you buy a bag of epsom salt, it says right there to mix a couple of cups or more of salt in a warm bath to relieve minor cramps, sprains, bruises, etc. But the research supporting that is surprisingly lacking. One often sited study that claims transdermal absorption absolutely works has been discredited for lack of generally accepted research protocols although their statistics for magnesium absorption are impressive. However, it’s important to note that while there’s a lack of evidence that says it does work, I found nothing that says it does not work.


Let’s look at other ways you can get magnesium for a moment. Magnesium is found in green vegetables, nuts, seeds and unprocessed grains. Drinking water is a decent source. Legumes, fruit, meat and fish are “intermediate” sources. Processed foods have a much lower magnesium content and dietary intake of magnesium in the western world is decreasing owing to the consumption of processed food. With the omnipresence of processed foods, boiling and consumption of de-mineralized soft water, most industrialized countries are deprived of their natural magnesium supply. There are oral supplements and better sports drinks (like Skratch Labs!) do their part to help replenish magnesium and other electrolytes lost through sweat.


So, to soak or not to soak? That is the question.

The answer? My advice is to soak. At least try it. Here’s why. Your great-grandmother did it. Your grand-mother did it. Maybe your mom did it. Maybe they did it because it works. I do it because it works for me. I can tell you that a foot bath with 2 cups of epsom salts in about a gallon of water makes my feet feel amazing after about 12-15 minutes of soaking.


The crux of the matter: If transdermal absorption of magnesium works, you’re helping to remedy a potential electrolyte imbalance that will help relax (and maybe hydrate) tissues that are sore, cramped and likely leading to other issues including movement compensations that can have further implications up the kinetic chain.


If you try it and feel like you got absolutely nothing from it, it’s possible that you don’t have a magnesium deficiency. Or, your ancestors and I fell for the placebo affect. What do you have to lose? 15 minutes? You don’t have to tell anyone you tried it. What do you have to gain? You might not have felt this good and relaxed since who knows when.


Here are some of the articles I’ve referenced to write this post:


Are you still interested in learning more? Learn more from our highly-skilled personal trainers in Wheat Ridge, CO. Contact us today!

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