Topical magnesium is a preparation of magnesium chloride dissolved in a liquid for direct application onto the skin (transdermal use). This method bypasses the digestive system, which is beneficial for people who experience stomach upset from oral magnesium supplements. The resulting solution is often misleadingly called “magnesium oil” due to its slightly oily texture, but it is actually a highly concentrated brine. People use these preparations hoping to achieve localized muscle relief, reduce tension, or promote relaxation and better sleep. The do-it-yourself (DIY) approach uses highly soluble magnesium chloride flakes or crystals.
Essential Ingredients and Supplies
The foundation of any homemade topical magnesium product is high-quality magnesium chloride flakes. These flakes are preferred over Epsom salts (magnesium sulfate) because magnesium chloride is considered more bioavailable for topical absorption. The typical starting ratio for a strong solution is one part magnesium chloride flakes to one part distilled water. A slightly lower concentration may be preferable for sensitive skin.
Distilled water is necessary to ensure shelf stability and prevent the introduction of impurities found in tap water. Essential equipment includes a heat-safe glass measuring cup or bowl for mixing. For the simple spray, a clean glass spray bottle is required for storage.
For advanced preparations like lotions, you will need a kitchen scale to accurately measure components and a double boiler setup to gently heat the ingredients. Stirring utensils should be clean and non-reactive. Accurate measurement is important for the lotion to ensure a successful, stable emulsion. The final product must be stored in appropriate, clean jars or containers.
Simple Preparation: Magnesium Oil Spray
The easiest method involves making the simple “magnesium oil” spray, which is a concentrated water-based brine solution. Begin by measuring equal parts of magnesium chloride flakes and distilled water (a 1:1 ratio). Heating the distilled water helps the flakes dissolve faster, so bring the water to a boil and then remove it from the heat.
Pour the hot water over the measured magnesium flakes in a heat-safe glass container. Stir the mixture gently until the flakes have completely dissolved and the solution appears clear. Once the mixture is completely cool, transfer it into a clean glass spray bottle. This preparation results in a product with a slightly slick, non-oily feel that is ready for immediate use.
Advanced Preparation: Magnesium Lotion or Cream
Creating a magnesium lotion or cream requires emulsification to combine the water-based magnesium brine with nourishing oils and butters for a thicker, non-greasy texture. This method requires two separate phases: an aqueous (water) phase containing the magnesium brine and an oil phase containing carrier oils and an emulsifier. The aqueous phase is prepared by dissolving the magnesium flakes in distilled water, similar to the spray method, and then set aside to cool slightly.
The oil phase involves combining ingredients like shea butter, coconut oil, or other carrier oils with an emulsifying wax. This wax is necessary to bind the water and oil components together. These ingredients must be gently heated using a double boiler until the waxes and butters are fully melted and combined into a clear liquid. Both the oil phase and the water phase must be at similar temperatures, typically around 160°F, before they are combined to ensure a stable emulsion.
Once the phases are ready, the oil mixture is added to a mixing bowl. The warm magnesium brine is slowly poured into it while blending vigorously with an electric mixer. This continuous, high-shear mixing creates the lotion’s creamy texture as the emulsifying wax traps the water and oil molecules together. Mixing should continue until the lotion has cooled and thickened substantially. Optional ingredients, like essential oils or a preservative, can then be incorporated.
Safe Storage and Application Guidelines
Proper storage is necessary to maximize the shelf life of your homemade topical magnesium. Both sprays and lotions should be kept in a cool, dark place away from direct sunlight and excessive heat, as temperature fluctuations can compromise stability. The simple magnesium oil spray typically lasts for about six months when stored at room temperature.
Magnesium lotions contain water, fats, and no commercial preservatives, giving them a shorter optimal shelf life, often three to four months. Lotions should be handled with clean hands to prevent microbial contamination. Before using the product extensively, perform a patch test on a small area of skin to check for any adverse reaction. A mild tingling or stinging sensation upon initial application is common, especially if the solution is highly concentrated or applied to irritated skin, but this often subsides with regular use.
The best application areas are typically the torso, legs, and arms, where the skin is less sensitive. For muscle discomfort, apply the product directly to the affected area. If irritation persists, you can dilute the product or rinse it off with water about 20 minutes after application.