Peptide therapy is everywhere right now, but almost no one explains what a peptide actually is. The simple version: it's a short chain of amino acids that often acts as a messenger in your body. Here's a clear, honest, hype-free guide to how it works.

People assume peptides and NAD+ are basically the same thing. They're not. One is a single coenzyme that powers cellular energy and repair; the other is a whole family of messenger molecules. Here's a clear, honest comparison of how each works and why people use them.