How do you make hypoallergenic bath bombs?

To make hypoallergenic bath bombs, start by combining dry ingredients like baking soda, citric acid, and Epsom salt in a bowl. For binding, use a mild oil such as coconut or almond oil, and add a few drops of essential oils that are known to be gentle, like lavender or chamomile, if desired. Avoid common allergens like synthetic fragrances and dyes. Finally, mold the mixture into shapes and let it dry for at least 24 hours before using.