Hormones are classified into three types:

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Hormones can be classified into three main types based on their chemical structure: amines, peptides/proteins, and steroids. Amine hormones are derived from the amino acid tyrosine (e.g. epinephrine), while peptide hormones are chains of amino acids (e.g. insulin). Steroid hormones are derived from cholesterol and have a distinctive four-ring structure (e.g. testosterone). While other types of hormones exist, they are not typically classified as separate categories but rather as variations within these three main groups.

Hormones Are Classified into Three Types