Skip to main content
. Author manuscript; available in PMC: 2019 May 15.
Published in final edited form as: Arch Biochem Biophys. 2018 Mar 27;646:46–54. doi: 10.1016/j.abb.2018.03.033

Fig. 1.

Fig. 1

Schematic absorption spectra of chromophores in human skin, including transitions from oxy- hemoglobin, HbO, de-oxyhemoglobin, Hb, β-carotene, and melanin. A spectral window for the detection of carotenoids with relatively weak absorptions from Hb/HbO exists in the 460–520 nm wavelength range.