Glycerol is widely used in medicine. industry and skin care products. This study investigated a high-sensitivity glycerol concentration sensor based on double Fano resonances in a metal-insulator-metal (MIM) waveguide structure. established a coupling model of a baffle waveguide (BW) and a circular split ring resonator (CSRR). https://megavitamines.shop/product-category/creatine/