Steroid dehydrogenases are enzymes that play a crucial role in the metabolism of steroids. They facilitate the conversion of steroid hormones by adding or removing hydrogen atoms, which alters the chemical structure of these compounds. This process is essential for the synthesis and breakdown of hormones like testosterone and cortisol, influencing various physiological functions in the body. These enzymes are part of a larger family known as dehydrogenases, which are involved in oxidation-reduction reactions. Steroid dehydrogenases are found in various tissues, including the liver and adrenal glands, and are vital for maintaining hormonal balance and regulating metabolic pathways.