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Daily Consumption of a Fruit and Vegetable Smoothie Alters Facial Skin Color

Fig 6

Changes in the reflectance spectrum of the skin.

To confirm that color changes in the skin were likely to be correlated with carotenoid deposition in the skin, the change in the spectral reflectance of the skin between the baseline and week 5 measurements was calculated at 10 nm intervals from 400–540 nm. An increase of skin reflectance between 450 nm and 510 nm was seen in the intervention group (solid line), while no increased skin reflectance was measured in the control group (long dashed line). Absorption spectra for β-carotene (dotted line) and lycopene (short-dashed line) in 80% ethanol, 20% ether are included for comparison.

Fig 6

doi: https://doi.org/10.1371/journal.pone.0133445.g006