Magnesium spray is a concentrated solution of magnesium chloride dissolved in water, often called “magnesium oil” due to its slick texture. This topical application method has gained popularity among parents seeking non-invasive ways to supplement this mineral for their children. While the appeal lies in its simple application, its use raises questions about safety and effectiveness for pediatric populations. This article addresses whether this method is appropriate for children and outlines the necessary precautions.
The Science of Topical Magnesium
The primary reason parents choose magnesium spray is the concept of transdermal absorption, suggesting the mineral can be absorbed directly through the skin. This route is favored because it bypasses the gastrointestinal tract, potentially avoiding digestive upset, such as diarrhea, sometimes caused by oral supplements. Magnesium is a mineral involved in over 300 enzyme reactions, supporting functions like muscle contraction, nerve signal transmission, and energy production.
While proponents suggest transdermal delivery efficiently boosts magnesium status, the scientific community is mixed on the extent of systemic absorption. Some studies indicate magnesium ions can pass into the outer layer of the skin. However, much research suggests the amount absorbed through the skin may not be significant enough to meaningfully elevate serum magnesium levels in the bloodstream.
The skin acts as a barrier, and research regarding topical magnesium’s effectiveness for systemic effects is not conclusive. Some experts argue that reported benefits are localized rather than systemic. Despite the absorption debate, many parents use the spray for perceived benefits related to muscle relaxation and calming effects.
Safety Guidelines and Application for Children
Magnesium spray can generally be used on children, but preparation and application require strict attention to prevent skin irritation. Standard magnesium chloride solutions are highly concentrated and can cause discomfort, particularly on younger children’s sensitive skin. Therefore, the product must be diluted before the first use.
A common starting dilution is a 50:50 ratio—mixing one part spray with one part distilled water—or greater dilution for very sensitive skin. Parents must always begin with a small patch test on an inconspicuous area, such as the inner wrist or behind the knee. Wait 24 hours to monitor for any adverse skin reactions before proceeding.
Application should be limited to less sensitive areas, with the bottoms of the feet and the legs being the most common sites. Avoid all broken skin, cuts, or scrapes, as the high salt content will cause immediate stinging. Application to mucous membranes or the face should also be avoided.
A gentle starting dose is recommended, such as one or two sprays applied once daily, and the application should be massaged into the skin. Before introducing any new topical treatment, parents should consult with a pediatrician, especially if the child is on other medications. This consultation helps establish a safe starting regimen and determines appropriateness for the child’s individual health profile.
Common Side Effects and When to Avoid Use
The most frequently reported side effect is a temporary skin sensation described as tingling, stinging, or itching. This reaction, sometimes called the “magnesium itch,” is generally not an allergic response. It is attributed to the high concentration of the salt solution or potentially an indication of low magnesium status in the user.
To mitigate this sensation, the application site can be rinsed with water after 20 minutes, or the solution can be further diluted for subsequent uses. If the child develops more severe skin reactions, such as a persistent rash, hives, or redness that does not fade, stop using the spray immediately.
Parents should be aware of the signs of potential over-absorption, though these are rare, even though transdermal use bypasses the digestive tract. Symptoms like severe lethargy, excessive muscle weakness, or a sudden onset of diarrhea necessitate stopping use and seeking medical advice. Children with pre-existing health conditions, particularly kidney impairment, should avoid using magnesium spray without a doctor’s approval, as the kidneys eliminate excess magnesium from the body.