Table 4. Percent of trans-resveratrol remaining over time when the compositions containing it are spread on glass, incubated at 37˚C and protected from light.

Table 4 shows that the percent of trans-resveratrol remaining by HPLC after being spread in a thin layer on glass and incubated at 37oC for 2, 4, and 16 hours was 99.30%, 99.93% and 98.79%, respectively.