<p>This study evaluated the effects of 30% hydrogen peroxide (HP) solution incorporated with strontium-containing Fluorapatite (Sr-FAp) on whitening efficacy and enamel surface properties, aiming to minimize enamel damage during bleaching. A total of 60 extracted bovine teeth were stained with black tea and divided into five groups (<i>n</i> = 12): DW (distilled water), 30% HP, 1 wt% Sr-FAp + HP, 5 wt% Sr-FAp + HP, and 10 wt% Sr-FAp + HP. DW and HP solutions with or without Sr-FAp were applied three times for 20&#xa0;min each. The surface color alteration, gloss, roughness, microhardness, and enamel microstructure were analyzed before and after bleaching. All experimental groups showed significantly higher ΔE_ab values than those of the DW group (<i>p</i> &lt; 0.05), with no significant differences between Sr-FAp concentrations (<i>p</i> &gt; 0.05). ΔWI_D and ΔE₀₀ followed similar trends. Gloss decreased in all HP-treated groups compared to the DW group (<i>p</i> &lt; 0.05), with the 10 wt% Sr-FAp group showing the lowest gloss (<i>p</i> &lt; 0.05). There were no significant differences in surface roughness (<i>p</i> &gt; 0.05), whereas the 10 wt% Sr-FAp group showed the highest microhardness value (<i>p</i> &lt; 0.05). Observations of the enamel surface revealed the presence of Sr-FAp nanoparticles in all Sr-FAp groups. HP containing Sr-FAp effectively whitened the teeth while preserving the enamel microhardness and structure via a protective Sr-FAp layer. Sr-FAp shows promise as a remineralizing filler for whitening treatments, maintaining whitening efficacy while minimizing enamel damage.</p>