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Comparison of cumulative ATRA amount permeated from different formulations through porcine skin after 24 h. Data represent the mean ± SD of at least four experimental determinations.
| Formulation | Amount Permeated (µg cm−2 ± SD) |
|---|---|
| ATRA-TPGS dispersion | 27 ± 5 |
| ATRA-TPGS-loaded gel | 22 ± 4 |
| ATRA hydroalcholic solution | 32 ± 3 |
