ISPE Glossary of Pharmaceutical and Biotechnology Terminology

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Classified as lipids, naturally occurring steroids are hormones that are important regulators of animal development and metabolism at very low concentrations. A well known steroid, cholesterol, is present in membranes of animal tissues. Other steroids include testosterone (a male sex hormone), cortisone (an adrenocortical hormone), estrone (a female sex hormone), and progesterone.

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