Substitute for Baking Soda in Deodorant: A Simple Recipe

A practical substitute for baking soda in homemade deodorant is magnesium hydroxide powder, blended with arrowroot, shea butter, coconut oil, and a little beeswax. This simple, baking soda-free balm is applied in a thin layer to clean, dry underarms; it helps manage odor but does not stop perspiration like an antiperspirant.

Ingredients

This batch makes about 2¼ ounces (64 g), enough to fill a small 3-ounce (90 ml) jar with room to spare. Use plain, dry powders rather than liquid products; the formula depends on staying anhydrous so it keeps its balm-like texture.

2 tablespoons (16 g) magnesium hydroxide powder: This is the main baking soda alternative. Choose a finely milled powder labeled for cosmetic or personal-care use, without added fragrance or other ingredients. It remains suspended in the balm rather than dissolving.
2 tablespoons (16 g) arrowroot starch: It gives the balm a softer, less oily feel and helps absorb surface moisture. Tapioca starch can replace it in the same amount, though the finished balm may feel a little silkier.
1 tablespoon (14 g) shea butter: This helps make the mixture spreadable. Use plain, unscented shea butter; refined or unrefined both work.
1 tablespoon (14 g) coconut oil: This adds glide and helps carry the powders across the skin. It becomes firmer in a cool room and softer in a warm one.
1 teaspoon (4 g) beeswax pastilles: Beeswax firms the balm so it is less likely to run or feel greasy. Use cosmetic-grade pastilles for easier measuring and melting.

You will also need a small heat-safe bowl or double boiler, a spoon or mini whisk, and one clean, completely dry 3-ounce (90 ml) jar. The jar is a container, not part of the measured formula.

Instructions

Prepare the jar and powders. Wash the jar and utensils, then let them dry fully; even a little water can make an oil-based balm spoil sooner or separate. Measure the magnesium hydroxide and arrowroot into a small bowl and stir them together. Avoid tipping or shaking the powders from a height, since fine particles can become airborne.
Melt the oils and wax. Put the shea butter, coconut oil, and beeswax pastilles in a heat-safe bowl set over a pan of gently simmering water. Keep the bowl above the water rather than letting it sit in the pan. Stir for about 3–5 minutes, just until the wax and butters have melted. Do not let water or steam splash into the bowl.
Cool briefly. Remove the bowl from the heat and let the mixture stand for about 2 minutes. It should still be liquid, but not piping hot. This short pause makes it easier to incorporate the powders without clumping or creating a cloud of dust.
Whisk in the dry ingredients. Add the powder blend in two or three small additions, whisking steadily after each one. Scrape the sides and bottom of the bowl so no dry pockets remain. The magnesium hydroxide will not dissolve; a smooth, evenly cloudy mixture is the goal, not a transparent liquid.
Transfer while pourable. Scrape the mixture into the dry jar. If it starts to thicken before you finish, place the bowl over the warm water for a few seconds and stir. Do not add water, aloe gel, or liquid milk of magnesia to loosen it; those additions change the formula and can cause separation or shorten its keeping time.
Let the balm set. Leave the jar uncovered on a level, cool counter for about 1 hour, until the center is firm. Once set, close the lid. If the powders settle slightly as it cools, stir the balm thoroughly while it is still soft next time, or simply mix the finished jar before use.
Patch test before regular use. Smooth a rice-grain-sized dab onto a small area of intact skin and wait 24 hours. If there is no discomfort, use a pea-sized amount for both underarms as a starting point. Apply only to clean, dry skin, and stop using it if you notice persistent redness, itching, burning, or a rash.

Tips

Choose the right magnesium product. Use a dry, single-ingredient magnesium hydroxide powder. Liquid milk of magnesia is a suspension containing water and other ingredients, so it is not a one-for-one replacement in this oil-and-wax recipe. It can make the balm watery, uneven, or difficult to preserve hygienically.
Keep powders low and contained. Measure them close to the bowl and stir gently at first. Avoid breathing in fine powders, and wipe the work surface with a damp cloth after mixing rather than brushing the residue into the air.
Start with a small amount on skin. Baking soda-free does not mean irritation-free: magnesium hydroxide, starches, and fragrance ingredients can still bother some people. Test a small spot first, and do not apply the balm to freshly shaved, broken, or irritated skin.
Adjust texture with small changes only. If the balm feels too soft in a warm room, remelt it and add about ½ teaspoon (2 g) beeswax. If it feels too firm, remelt and add 1 teaspoon (4 g) coconut oil. Mix well and let the jar reset before judging the texture.

Serving Suggestions

This is a personal-care balm rather than a food, so “serving” means how much to apply. Begin with a pea-sized amount for both underarms, warming it between clean fingertips before smoothing on a very thin layer. A thick coating is not more effective and may leave a waxy feel on skin or transfer to clothing. Give the balm a minute to settle before putting on a shirt, especially if the fabric is dark or delicate.

Use it on clean, fully dry skin. If you are switching from a conventional product, the feel may be different: this balm does not block sweat, and its purpose is not to keep underarms dry. How well it manages odor can vary with activity, clothing, weather, and individual skin. Carry a small, tightly closed container only if it will stay cool; the balm can soften or melt in a hot car, a sunny bag, or near a heater.

Variations

Use tapioca starch instead of arrowroot: Substitute 2 tablespoons (16 g) tapioca starch for the arrowroot. The balm may feel a little more silky or powdery, but the basic method and quantity stay the same. Cornstarch is another possible swap, though its texture can feel heavier to some people. Use a fresh, dry starch and do not substitute flour, which is not suited to this skin-care formula.

Make it vegan: Replace the 1 teaspoon (4 g) beeswax with about ¾ teaspoon (3 g) candelilla wax, then assess the set after cooling. Candelilla is firmer than beeswax, so using an equal weight can make the balm too hard. If it sets very firm, remelt and add coconut oil a little at a time.

Try a different butter: Cocoa butter can replace shea butter in the same 1 tablespoon (14 g) quantity. It makes a firmer balm with a more noticeable cocoa aroma. If you use a strongly scented unrefined butter, remember that it may change the finished scent; unscented ingredients make it easier to tell whether a skin reaction is related to the formula.

Keep it fragrance-free, or scent cautiously: The plain recipe has no essential oils, which keeps the ingredient list simple. Essential oils are not necessary for odor control and can irritate skin or trigger sensitivity. If you decide to add one, choose an ingredient specifically appropriate for leave-on skin products and follow its supplier’s skin-use limits; never add a large splash by guesswork. For sensitive skin, leave the formula unscented.

Other baking soda-free deodorants use ingredients such as zinc ricinoleate or magnesium carbonate, but these powders do not behave identically and may need a different formula. Avoid swapping them gram-for-gram without a reliable formulation, because the texture and skin feel can change. Magnesium hydroxide is a practical home-recipe choice, not a guarantee that a product will suit every person.

Storage and Reheating

Store the closed jar in a cool, dry place away from direct sun and bathroom splashes. For the cleanest use, take product with dry fingers or a small clean spatula, and do not let water enter the jar. As this homemade balm has no preservative and is not made under sterile conditions, prepare a small batch and use it within about 4–6 weeks. Discard it sooner if the smell changes, the color looks unusual, or you see any sign of contamination. Do not rely on refrigeration to make a contaminated product safe.

In a warm room, the coconut oil and shea butter may soften; in a hot environment, the balm can melt. If it is only soft, move it to a cooler spot and let it firm up. If it separates or becomes grainy, you can gently remelt the contents in a heat-safe bowl over warm water, stir thoroughly, return it to a clean, dry jar, and let it set again. Do not microwave the closed jar, and do not add water to restore texture. Reheating is only for texture, not a way to extend the storage period.

Frequently Asked Questions

What is the best substitute for baking soda in deodorant?
For this balm, magnesium hydroxide powder is the main substitute. It is commonly used in baking soda-free deodorant formulas, but it is not guaranteed to work for everyone and may still irritate some skin. Arrowroot supports the texture and moisture-absorbing feel; it is not a direct replacement for magnesium hydroxide.

Can I use milk of magnesia instead of magnesium hydroxide powder?
Not in this recipe. Milk of magnesia is a liquid suspension, while this balm is designed around dry powders and oils. Adding the liquid can make the mixture separate or spoil sooner. Use a plain dry magnesium hydroxide powder, or choose a different recipe specifically formulated for a liquid product.

Will this stop me from sweating?
No. This is a deodorant balm, not an antiperspirant. It is intended to help manage odor while allowing normal perspiration. If you need a product that reduces wetness, look for an antiperspirant rather than expecting an oil-and-powder deodorant to do that job.

Why does my homemade deodorant feel gritty?
Magnesium hydroxide does not dissolve in oil, so a slight powdery feel is normal. Fine-milled powder, careful whisking, and stirring as the mixture cools can improve the texture. If it feels unpleasantly coarse, check that the powder is finely milled and has not clumped from moisture.

Can I use it after shaving?
It is better to wait until the skin feels calm and intact. Shaving can leave tiny areas of irritation, and applying powders or fragrance to freshly shaved skin may sting. The same caution applies to skin that is chafed, broken, or already irritated.

Can I make this without beeswax?
Yes, but the balm will be softer and more prone to melting. For a vegan version, use the smaller candelilla-wax amount in the variations and check the texture after it has fully set. Coconut oil alone will not reliably provide the same firmness, especially in a warm room.

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