Every acronym on this site, explained without the jargon — so you can read a COA or compare vendors without a dictionary. For research use only; nothing here is medical or dosing advice.
A designation meaning a product is sold for laboratory research, not for human or veterinary use. Everything indexed on this site is discussed on that basis only.
A lab document reporting a specific batch’s test results — usually identity and purity. A third-party (independent) COA is far stronger evidence than one the seller issued themselves. Learn more ›
High-Performance Liquid Chromatography — the test that measures how pure a sample is, usually as a percentage. A purity number only means something when it names the lab and the batch it came from.
A test that confirms the compound is actually what the label says. Purity without identity is only half the picture — you want both.
The share of a sample that is the intended compound, per HPLC. Higher is better, but the lab name and the batch it is tied to matter just as much as the number.
The code identifying one production run. Testing and reviews are only trustworthy when they are tied to the exact lot you actually receive.
Testing done by an independent lab (for example Janoshik or Freedom Diagnostics), not by the seller. Independent results are much harder to fake than a vendor’s own paperwork.
The sealed glass container a peptide ships in, labeled by its milligram (mg) content. We compare prices by the vial because that is what you actually pay at checkout.
A single vial that contains more than one compound.
A milligram (mg) is 1,000 micrograms (mcg). Labels and prices are given in mg; confusing the two is one of the most common beginner mistakes.
Mixing a freeze-dried (lyophilized) peptide with a sterile liquid so it can be handled in the lab. Our calculator helps with the arithmetic — it is about handling, not dosing. Learn more ›
Sterile water with a small amount of preservative, commonly used to reconstitute peptides in research settings. Learn more ›
Brand-name medicines (e.g. Wegovy, Zepbound) are FDA-approved and made by the original manufacturer. Compounded versions are prepared by licensed pharmacies. This distinction mainly matters on the telehealth side. Learn more ›
A class of compounds (for example semaglutide, tirzepatide, retatrutide) studied in metabolic research. Discussed here only as research compounds — for any medical use, consult a licensed clinician. Learn more ›
Our 0–100 score for a vendor, combining price, verification, how recent their COAs are, and screened reviews. It is never for sale. Learn more ›
A vendor whose batch-tied COAs, review authenticity, and pricing held up under independent checking. It is not a health or safety endorsement, and it can never be bought. Learn more ›
Our list of vendors with a confirmed, evidence-backed problem — a forged COA, non-delivery, or uncorrected false claims. Every flag shows its specific reason. Learn more ›
The chart behind an HPLC purity number. A purity figure with no chromatogram to back it is easy to invent — a real COA shows the chart.
A link where we may earn a commission at no extra cost to you. On this site affiliate links are always clearly labeled, and they never affect our rankings or ratings. Learn more ›
Licensed medical care delivered by video or phone. It is where we send every medical question — for example, whether a treatment is right for you. Learn more ›