Effect of 82% Lactic Acid in Treatment of Melasma

Table 4

Physician visual analogue scale with lactic acid treatment at different durations.

	0 weeks	2 weeks	4 weeks	6 weeks	8 weeks	10 weeks	12 weeks	16 weeks	20 weeks	24 weeks
VAS 0	12	9	8	6	4	4	3	3	3	3
No improvement	60%	45%	40%	30%	20%	20%	15%	15%	15%	15%
VAS 1	6	8	9	10	11	11	11	11	11	11
0–25% improvement	30%	40%	45%	50%	55%	55%	55%	55%	55%	55%
VAS 2	2	3	3	4	5	5	6	6	6	6
25–50% improvement	10%	15%	15%	20%	25%	25%	30%	30%	30%	30%