You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is a phytosterol? and explain in detail?
Sterols are molecules with the cyclopentano-perhydro-phenanthrene (CPP) nucleus Sitosterol Plant (phyto) sterol Ergosterol Fungal (myco) sterol Cholesterol Animal (zoo) sterol Plant sterols (sitosterol) | absorption of cholesterol Sitosterolemia Autosomal recessive disorder Defects in either ABCG5 or ABCG8 | Plant sterol levels Xanthomas Atherosclerosis