Ask what tooth enamel actually is, and the answer is mostly one substance: hydroxyapatite, a crystallized form of calcium and phosphate. It makes up about 97% of your enamel and around 70% of the dentin underneath. Your teeth are, quite literally, built from it.
The Japanese toothpaste story
In the 1980s, Japanese companies began adding a synthetic version of this exact mineral to toothpaste. The idea was simple: if enamel is made of hydroxyapatite, give the mouth more of the raw material. Japanese consumers have been brushing with it for four decades now, and in recent years hydroxyapatite toothpastes have spread across Europe and the US as a fluoride-free option.
What the research explores
Studies on hydroxyapatite focus on remineralization, the natural process where minerals from saliva are deposited back into enamel. Daily life constantly pulls minerals out of teeth through acid from food and bacteria. Saliva puts them back. Hydroxyapatite research looks at supporting that repair cycle by keeping the raw material available in the mouth.
Why it's in a chewable
Gum Armor includes microcrystalline hydroxyapatite alongside its probiotic strains and xylitol base. It's the third job of the Feed + Starve Method: feed the good bacteria, starve the bad, and keep enamel's own mineral in the mix. Because the tablet is chewed rather than swallowed whole, the formula spends its time where your teeth actually are.
One chew a day. Backed by the 90-day guarantee.
Shop Gum Armor*This article is for education. The studies discussed examine ingredient families, and Gum Armor is a dietary supplement that helps maintain strong gums and healthy teeth. It doesn't diagnose, treat, cure, or prevent any disease.