Can I freeze peptides to extend shelf life?

Never freeze peptides, as this destroys the protein structure and renders them ineffective. Store between 36-46°F (2-8°C). Freezing is one of the most common storage mistakes. <a href='https://www.fda.gov/drugs/ensuring-safe-use-medicine/safe-storage-and-disposal-medicines' target='_blank'>FDA storage guidelines</a>