Bests & Worsts Reviews from Amazon

Nano-hydroxyapatite (nHA) is a synthetic form of hydroxyapatite, itself a form of the calcium phosphate that makes up the majority of tooth material, including 97% of enamel. The nano part refers to the size of the tiny particles that make it up, suited to penetrating tiny openings in tooth enamel. It was developed by NASA in the 1970s. The patent was sold to a Japanese company in 1978, and it's been sold in Japan for use in toothpaste since 1980. Studies show it's comparable to fluoride in various kinds of tooth surface repair, though it hasn't been tested nearly as much yet. It's also been shown to help reduce some tooth sensitivity, believed to occur by blocking the dentin tubules associated with some sensitivity. And there's some evidence it helps reduce harmful effects of some bacteria in the mouth. The seller says in answer to questions the nHA concentration in this is 10%, an amount found effective in studies and in line with industry practices. Safety Safety studies are ongoing, but so far they've found nHA to be safe in the ways normally tested for. In use The toothpaste cleans well in the ways I can detect, leaves my teeth feeling smooth and clean. It has a strong minty flavor, with peppermint, spearmint, anise, wintergreen, mango, menthol and cardamom among the flavor ingredients. The sweetening is from sorbitol, xylitol and stevia. Whitening There's nothing about whitening in the description, but some of the ingredients do help remove surface stains. (Most "whitening" toothpastes don't do anything more than that.) Other ingredients Not all of the ingredients are natural, but there's a lot of natural stuff in this. The scrubbing ingredients are hydrated silica, silica, and a bit of baking soda. Other cleansing agents include sodium lauroyl sarcosinate, which also helps foam, and methylsulfonylmethane, which is supposed to help with whitening and plaque and tartar control. Potassium chloride can help with tooth sensitivity over time, though it's the last ingredient, so there doesn't seem to be a lot of it. Sodium benzoate is used as a preservative. There's also aloe, tea, cucumber, and avocado. Water, vegetable glycerin, hydrated silica, sorbitol powder, silica, hydroxyapatite (nano), sodium benzoate, sodium lauroyl sarcosinate, Mentha piperita essential (peppermint) oil, Mentha viridis (spearmint) oil, Illicium verum (star anise) oil, Gaultheria procumberis (wintergreen) oil, xylitol, xanthan gum, Stevia rebaudiana extract powder, methylsulfonylmethane, Aloe barbadensis (aloe vera) leaf juice, sodium bicarbonate, Camellia sinensis (green tea) leaf extract, Cucumis sativus (cucumber) fruit extract, Persea gratissima (avocado) fruit extract, Mangifera indica (mango) fruit extract, menthol, Elettaria cardamomum miniscula seed (cardamom), potassium chloride. "Made in the same facility and on shared line as peanuts, tree nuts, dairy, eggs, and sunflower." Made in the US.