01 Do Klyyr and Himalaya both contain 10% hydroxyapatite?
Yes. Himalaya Extra Strength states 10% nano-HAp. One+ states 10% combined nano + micro HAp.
02 Does Himalaya use micro-hydroxyapatite?
The product compared is described as nano-HAp. One+ names nano and micro.
03 Are both fluoride-free and SLS-free?
Yes for the exact products compared.
04 Which one is better for whitening?
No head-to-head whitening trial is cited. Himalaya uses fruit-enzyme and polishing language; One+ contains no peroxide and does not claim bleaching.
05 Which has fewer ingredients?
The audited Himalaya formula lists 22 ingredients. One+ lists 16. Ingredient count alone does not establish clinical quality.