Four numbers decide whether a COA means anything. Here they are, what each one rules out, and how to spot a document designed to look reassuring rather than be informative.
Receptor saturation, tachyphylaxis, and the arithmetic behind a microgram dose most suppliers ignore.
Send this list to us and to everyone else you are considering. Compare the answers, not the websites.
Short amino-acid chains that tell cells what to do. Why that makes dose precision matter more than volume.
Bacteriostatic water, swirl versus shake, and how long a reconstituted vial is genuinely stable.
What the literature says about protocol length, and what happens to receptor sensitivity when you never stop.
Titration schedules, the side effects nobody screenshots, and the muscle-loss question worth planning for.