Release of Propolis Phenolic Acids from Semisolid Formulations and Their Penetration into the Human Skin In Vitro

Table 2

Quantitative profile of identified phenolic compounds in Lithuanian propolis extracts.

Solute	Vanillic acid	Caffeic acid	Vanillin	Coumaric acid	Ferulic acid
Aqueous extract (1 : 10) (mg/mL)	0.207±0.012	0.050±0.003	0.277±0.011	0.516±0.026	0.308±0.015
Soft propolis extract (mg/g)	4.132±0.023	1.432±0.046	6.521±0.011	18.469±0.041	12.937±0.011