Cholesterol is susceptible to oxidation during food processing and produces different COPs (). In the present survey, a dramatic increase in the total content of COPs in shrimp was observed during sun drying. Reaching a total content of 372.9+16.3… of lipids after 32h of direct sunlight. Direct exposure to UV and VIS light during sun drying of shrimp could be one of the mail factors that caused oxidation of cholesterol in samples (photo-oxidation). Several research findings in foods and model systems have shown that photo-oxidation of cholesterol is an important mechanism to consider, especially when this sterol is found together with PUFA and photosensitizers(). Other factora, such as pro-oxidant compounds, could also contribute to cholesterol oxidation in shrimp.