Rutin |
Proline-glutamic acid |
Oral |
Improved pharmacokinetics due to increased blood concentration |
[62] |
Berberine |
Proline-malic acid-lactic acid-water (1:0.2:0.3:0.5) |
Oral |
Improved pharmacokinetics due to increased blood concentration |
[61] |
Curcumin |
Choline chloride-glycerol (1:1) |
- |
Solubility in gastric and intestinal media was increased |
[29] |
Caffeine |
Choline-glutamine and choline-phenylalanine |
Topical |
Appropriate for in vitro skin application when formulated as oil-in-water emulsions and gels; increased drug loading while preserving formulation stability |
[63] |
Calycosin-7-O-β-D-glucoside |
Glucose-fructose-sucrose (32:32:5 by weight) and water |
Oral |
Increased blood concentration |
[58] |
Hydroxysafflor yellow A (HSYA) and anhydrosafflor yellow B (ASYB) |
l-proline-acetamide |
Oral |
Improved pharmacokinetics due to increased blood concentration |
[64] |