Hydroxyapatite
A chemical found in some toothpastes (also mineral name for calcium phosphate) that can help plug micro-fissures from tooth decay. Originally developed by NASA.
Videos Mentioning Hydroxyapatite

Long Muscle Length Training with Dr. Milo Wolf (Episode 125)
Stronger By Science
A chemical found in some toothpastes (also mineral name for calcium phosphate) that can help plug micro-fissures from tooth decay. Originally developed by NASA.

The Effects of Microplastics on Your Health
Andrew Huberman
A compound found in certain tooth tablets that is beneficial for remineralization of teeth and overall tooth health.

How to Improve Oral Health & Its Critical Role in Brain & Body Health
Andrew Huberman
The naturally occurring mineral responsible for the majority of strong bonds forming crystals in tooth enamel. It's an ingredient in some non-fluoride toothpastes.

AMA #15: Fluoride Benefits/Risks & Vagus Nerve Stimulation
Andrew Huberman
The primary mineral component of teeth, forming the crystal structure that fluoride bonds to, making teeth stronger.