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Peptides 101 Quiz
Quiz
How long is a peptide, typically?
Think about the cut-off between peptide and protein.
Under 50 amino acids is the standard cut-off. Above that, it's generally called a protein.
Quiz
Why are most peptides injected?
What's the problem with swallowing them?
Peptide bonds are food to your gut. Injection bypasses that. A few peptides use tricks to survive the stomach (oral semaglutide uses the absorption-enhancer SNAC).
Quiz
Why does a peptide have such a specific effect?
What determines which cells respond to it?
Peptides are lock-and-key molecules — they only work where a cell expresses the matching receptor. That's the source of their precision and most of their safety profile.
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