Try a powder format for your brushing routine with Cinna-Bone Tooth Powder. This formula contains hydroxyapatite from powdered bone sourced from grass-fed cattle, rather than synthetic hydroxyapatite.
Made without fluoride, SLS, glycerin, or foaming agents, it comes in a 2 oz glass jar with approximately 200 uses, as estimated by the supplier. Refer to the product label for complete ingredients and brushing directions.