Deep Eutectic Solvent: Improve the Constituents in Plantago asiatica L. ( PAL ) Extract Oral Absorption in Rats

, of PAL extract dissolved in 15% DES (v/v) via oral administration were superior to those dissolved in water. The findings indicated that DES may enhance the absorption of constituents in PAL extract, extend the duration and concentration of chemical components in vivo, and possibly improve the therapeutic efficacy.