Peptides are short strings of amino acids, the body's building blocks of protein. They help regulate blood pressure and digestion. Insulin is a peptide that controls blood sugar. Read more: https://www.usatoday.com/story/life/health-wellness/2026/07/23/peptides-fda-rfk-jr/91019990007/ Sign up for our newsletter for the day's top stories, from
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USA TODAY Peptides explained: Why popular wellness treatments raise safety concerns
