Algae Mask

Untreated area

t0

n = 23

t1

n = 23

t0

n = 23

t1

n = 23

Skin pH mean values

5.82

5.70

5.77

5.75

± SD

0.18

0.21

0.20

0.24

t1 − t0

n = 23

t1 − t0

n = 21

Mean diferences

−0.12

0.02

± SD

0.11

0.08

Mean differences (%)

−2.03%

0.27%

± SD (%)

1.99%

1.45%

No. of subjects with skin pH decrease

21

8

% of subjects with skin pH decrease

91.30%

38.10%

Maximum decrease (%)

−7.02%

−3.15%

Mean decrease among subjects with positive effects (%)

−2.24%

−0.98%

p value (before vs after product’s application)

< 0.001*

0.507*

p value (Investigational product vs untreated area)

< 0.001*

−