Tab.1

Preparation of AGAR plates containing preservatives"

Fig.1

Age of volunteers and distribution of isolated strains（A: Age of volunteers; B: Phyla level distribution of 435 isolates; C: Species level distribution of 435 isolates）"

Fig.2

Facial microbial composition of different gender groups: A: Venn diagram of species; B: The average number of bacterial species in male and female samples and the usage of cosmetics; C: The average number of species within the corresponding genus of male and female samples（*: T检验, P<0.05; **: P<0.01）"

Fig.3

Facial microbial composition of different age groups: A: Venn diagram; B: The average number of bacterial species in nonage/young/elderly samples and the usage of cosmetics; C: The average number of species within the corresponding genus of nonage/young/elderly samples（*: Tamhane’s T2-test, P<0.05）"

Fig.4

Facial microbial composition of different cosmetics usage groups: A: Venn diagram; B: The average number of bacterial species in cosmetic and non-cosmetic user samples; C: The average number of species within the corresponding genus of cosmetic and non-cosmetic user samples（*: T检验, P<0.05; **: P<0.01）"

Fig.5

The number of culturable bacteria species on the face of different population: A: The number of culturable bacteria species on the face of different gender groups; B: The number of culturable bacteria species on the face of different age groups（*: Tamhane’s T2-test, P<0.05）; C: The number of culturable bacteria species on the face of different cosmetic usage groups（*: Welch T检验, P<0.01）"

Fig.6

Inhibitory effects of different kinds of preservatives on culturable microorganisms in the face（A: 4-Hydroxybenzoic acid; B: Ethyl 4-hydroxybenzoate; C: Benzyl alcohol; D: Phenoxyethanol; E: CTAB; F: Dehydroacetic acid; G: Sodium salicylate; H: Imidazolidinyl urea）"