ADS	α-hydroxy-dihydrosphingosine
AGE	Advanced glycation products
AH	α-hydroxy-6-hydroxy-sphingosine
AP	α-hydroxy-phytoceramide
AS	α-hydroxy-sphingosine
BMI	Body mass index
ELISA	Enzyme-linked immunosorbent assay
EOH	Ester-linked-omega-hydroxy-6-hydroxy-sphingosine
EOS	Ester-linked-omega-hydroxy-sphingosine
GPx	Glutathione peroxide
Hs-CRP	High-sensitivity C-reactive protein
IL	Interleukin
MED	Minimal erythema dose
NP	Non-hydroxy-phytoceramide
NS	Non-hydroxy-sphingosine
PCA	Principal component analysis
PLS-DA	Partial least squares discriminant analysis
ROSs	Reactive oxygen species
SC	Stratum corneum
SOD	superoxide dismutase
TEWL	Transepidermal water loss
TNF-α	Tumor necrosis factor-α
UVB	Ultraviolet B