Figure 7. Results of the UV transmittance studies on formulations containing either 0.1% retinol or 0.25% retinyl palmitate

Formulations with no EHMC lost 87% and 93% of their peak UV absorbances after irradiation with 5 MED, whereas the formulas containing 4% EHMC showed little if any loss of peak absorbance after 5 MED.