One+ may fit if
You want a fluoride-free toothpaste with a disclosed 10% nano + micro hydroxyapatite blend, a fully listed 16-ingredient formula, no SLS, and no artificial dyes—and your dentist agrees a fluoride-free routine is appropriate for you.
You can change your daily toothpaste. Do not stop a fluoride routine your dentist prescribed without asking them first, especially for children or high cavity risk.
One+ uses a combined 10% nano + micro blend. Ten percent is not a universal efficacy threshold. The 18-month non-inferiority study used a 10% HAp toothpaste of a different formula. Read 10% hydroxyapatite toothpaste.
No. The cited 18-month study found non-inferiority for one primary caries endpoint in adults, using a different 10% HAp formula. That is not proof that Klyyr outperforms fluoride for you.
Ask the child's dentist. If you use One+, use a rice-grain amount under age 3 and a pea-sized amount for ages 3–6, supervise brushing, and encourage spitting rather than swallowing. See hydroxyapatite toothpaste for kids.
One+ does not carry the ADA Seal of Acceptance. Many fluoride toothpastes do. The Seal is a separate program and is not required to sell toothpaste.