Reference definition
National Human Genome Research Institute. Peptide. Talking Glossary of Genomic and Genetic Terms. ↗A definition of peptides as short amino-acid chains.
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Sources & evidence
The sources behind our stories: definitions, guides, and studies. Each entry explains what kind of evidence you are reading.
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Research guide
National Institutes of Health. Understanding Clinical Studies. Reviewed June 26, 2025. ↗Explains observational studies, randomized trials, and what different designs can answer.
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