Polyunsaturated fat molecule. Computer model showing the structure of three unsaturated fat molecules bound together to form a polyunsaturated fat molecule. Atoms are represented as spheres: carbon (black), oxygen (red), and hydrogen (blue). Unsaturated refers to the fact that the molecules contain less than the maximum amount of hydrogen atoms possible - as opposed to saturated fats, which are fully 'saturated' with hydrogen atoms.
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