Plain answers on sleep, supplements and reading the evidence

• Caffeine before an exam: how much, how early, and when to skip itOne to two cups 30 to 60 minutes before an exam helps alertness. Why you should never try a new dose on test day, and the 2pm cut-off that protects your sleep.Updated 24 October 2026
• What are peptides, actually? Not steroids, and not all the same thingPeptides are short amino acid chains your body already makes. Why they are not steroids, which are approved medicines, and what research peptides really are.Updated 24 October 2026
• Retatrutide: what the evidence actually shows, as of September 2026Retatrutide's Phase 3 TRIUMPH results, its regulatory status as of 2026, and what is still unknown about this GLP-1, GIP and glucagon triple agonist from Lilly.Updated 18 October 2026
• Creatine is the one supplement that survived the evidence, and most of what is claimed for it still has notCreatine monohydrate works for repeated high-intensity effort and lean mass. What 3 to 5 g a day does, what it does not, and which popular claims never held up.Updated 18 October 2026
• Third-party testing and in-house testing are not the same claimIn-house and third-party testing produce certificates that look the same. Who ran the test, on what sample, and the four questions that decide if it counts.Updated 18 October 2026
• How to read a Certificate of AnalysisHow to read a certificate of analysis: what HPLC purity and mass spec prove, why a vial's milligram figure is often gross weight, and what to ask a supplier.Updated 18 October 2026
• Research use only: what it actually meansResearch use only is a regulatory category, not legal cover. What the label says about safety, dosing and manufacturing standards, and why it matters.Updated 18 October 2026
• Studying without wrecking your sleepSleep is when studying turns into memory. Why an all-nighter cuts new learning by about 40%, and how to plan exam week so the hours you put in actually stick.Updated 18 October 2026