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isoprenoid summary

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Below is the article summary. For the full article, see isoprenoid.
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vitamin A Summary
Vitamin A, a fat-soluble alcohol, most abundant in fatty fish and especially in fish-liver oils. Vitamin A is also found in milk fat, eggs, and liver; synthetic vitamin A is added to margarine. Vitamin A is not present in plants, but many vegetables and fruits contain one or more of a class of