Does caffeine interact with peptides?

No significant interactions are documented. However, caffeine's appetite-suppressing effects may compound nausea from GLP-1 peptides. Some users find caffeine increases jitteriness when using stimulant-like peptides. Monitor your tolerance. <a href='https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much' target='_blank'>FDA Caffeine Safety</a>