Arsenic exposure usually sounds like something out of a nineteenth-century novel. A slow, deliberate poisoning. But in clinical practice, especially dealing with patients coming from heavy industry, agriculture, or mining, it is a very modern, very ugly reality. The damage doesn’t just stay in the liver or the kidneys. It crosses the blood-brain barrier. It …

Most people treat peptide therapy like a magic wand. You have a tear, a strain, or some ischemic damage, so you pin a few units of something you read about on a forum, go to sleep, and expect to wake up with brand-new tissue. It does not work like that. Peptides are just signaling molecules. …