Meso-zeaxanthin Assay:10%-99%% HPLC Package: Net weight 5.0-20.0 KG in the iron drum with plastic insider. Function and Application. Zeaxanthin is less common in the human diet-coming from certain orange and yellow fruits and vegetables. Meco- zeaxanthin is not found in the normal human diet, and is thought to originate from Lutein. The high concentrations and specific uptake of the macular carotenoids is mediated by specific binding proteins that draw them into the tissue and stabilize them.