Table 1.

Formula of gel selected for study

Material	Formulation code (w/w)
	F1	F2	F3	F0 (–)
Extract	5	7.5	12.5	–
Carbopol 940	2	2	2	2
TEA	3.5	3.5	3.5	3.5
Propylene glycol	10	10	10	10
Methyl paraben	0.2	0.2	0.2	0.2
Propylparaben	0.02	0.02	0.02	0.02
Purified water	ad 100	ad 100	ad 100	ad 100

TEA = triethanolamine

F1: gel with 5% extract concentration

F2: gel with 7.5% extract concentration

F3: gel with 12.5% extract concentration

F0: gel with 0% extract concentration as negative control