 Near-Infrared absorbers (λ = 700 to 1400 nm) include water, lipids, and glucose.Photoacoustic determination of blood glucose levels can be used for treating diabetes, while studying lipid concentrations within blood vessels is important for monitoring the progression of atherosclerosis.It is still feasible to quantify and compare deoxyhemoglobin and hemoglobin concentrations at this wavelength, trading deeper tissue penetration for lower absorption.