| ACN | Anthocyanin(s) |
| ATR-FTIR | Attenuated total reflectance-Fourier transform infrared |
| HPLC-MS | High-performance liquid chromatography-mass spectrometry |
| Kp | Permeability coefficient |
| MW | Molecular weight |
| PLS | Partial least squares |
| PDA | Photodiode array |
| SC | Stratum corneum |