Bath bombs do have an expiration date and a recommended shelf life, just like food products. The shelf life of a bath bomb refers to how long it can be stored and still maintain full effectiveness. The average shelf life of a bath bomb is about six months, although some higher-quality bath bombs may have an extended shelf life beyond the 12-month mark. The shelf life of a bath bomb is the same as its composite ingredient with the shortest shelf life, which is a general rule that applies to any product.
Bath bombs lose their fizzing effect after about six months but are still considered safe to use. However, added ingredients like flower petals, oatmeal, fresh fruit extracts, or essential oils can make bath bombs grow mold, get rancid, or lose their effectiveness over time. Therefore, it is advisable to store bought bath bombs in bulk bath bomb containers, airtight containers, jars, or bags to keep them dry, avoid direct sunlight, control the temperature, and prevent color and scent blending.
If you notice any signs of an expired bath bomb, such as discoloration, having a rancid smell, significant mold growth, or losing its ability to effervesce when dropped in the tub, you should not use it as it could bring about irritation to your skin.
