Notes from the bench.
How to read a certificate, what a purity figure actually measures, why a peptide lives at 2–8°C, and what the literature does and doesn't say about each compound we supply. Written for people who check.
HPLC-MS and peptide purity: what the number means
Chromatography measures how much of the sample is the main peak. Mass spectrometry confirms the peak is the right molecule. Why you want both, and what neither can tell you.
8 September 2026 · 5 min
ReadBuying research peptides in the UK: a ten-point checklist
Legal status, certificates, batch traceability, cold chain, payment — the ten things to check before you order from any UK research-peptide vendor, and the red flags that should end the conversation.
8 September 2026 · 5 min
ReadTesting & quality
4 articlesHow to read a peptide certificate of analysis
A CoA is only as good as your ability to read it. The seven fields that matter, the ones that are decoration, and the mismatches that should stop an order.
8 September 2026 · 5 min
ReadHPLC-MS and peptide purity: what the number means
Chromatography measures how much of the sample is the main peak. Mass spectrometry confirms the peak is the right molecule. Why you want both, and what neither can tell you.
8 September 2026 · 5 min
ReadWhat a Janoshik report proves — and the four things it doesn't
The lab every UK vendor cites. What its reports actually measure, how to verify one yourself in thirty seconds, why two labs give two numbers for one batch, and the four things no purity report can tell you.
8 September 2026 · 5 min
ReadResearch-grade vs pharmaceutical-grade: what the words actually mean
Same molecule, different product. What a licensed medicine is tested, certified and monitored for that a research compound is not — and why 'pharmaceutical grade' on a vendor page is a phrase, not a standard.
8 September 2026 · 4 min
ReadBuying guides
6 articlesBuying research peptides in the UK: a ten-point checklist
Legal status, certificates, batch traceability, cold chain, payment — the ten things to check before you order from any UK research-peptide vendor, and the red flags that should end the conversation.
8 September 2026 · 5 min
ReadIs retatrutide legal in the UK? The 2026 position, plainly
No licence, no prescription, not on the NHS — and yet lawful to supply for research. The two regulations that draw the line, what the seizures were actually about, and the questions people search for most.
8 September 2026 · 5 min
ReadWill UK customs seize peptides? Importing versus buying domestically
What Border Force actually detains, why a parcel is judged by how it's presented, the one-month clock if something is held, and why stock already in the UK sidesteps the whole question.
8 September 2026 · 4 min
ReadWhy there is no dosing guide on this site
The most-searched questions about every compound we sell are questions we won't answer. Why that's the line, what it tells you about vendors who cross it, and what we will help with.
8 September 2026 · 4 min
ReadWhy peptide vendors don't take cards — and what a safe payment looks like
Card networks class the category as high-risk, so bank transfer and crypto are the norm. What that does to your protection, which method actually leaves you covered, and the payment red flags to walk away from.
8 September 2026 · 4 min
ReadHow much should retatrutide cost in the UK? A price, taken apart
Manufacture, the pen, two rounds of testing, refrigeration, UK stock and a UK company: what a price is made of, why per-milligram is the only fair comparison, and why the cheapest listing is the one to worry about.
8 September 2026 · 4 min
ReadCompounds
5 articlesRetatrutide, explained: the triple agonist in the literature
What retatrutide is, which three receptors it targets, where it sits in the trial pipeline, its UK regulatory status, and what to check on a research-grade certificate.
8 September 2026 · 4 min
ReadTirzepatide vs retatrutide: dual and triple agonists, side by side
The two most-searched incretin peptides compared on what can honestly be compared: receptors, chemistry, trial programme, regulatory status and research supply.
8 September 2026 · 4 min
ReadBPC-157 and TB-500: what they are, and why they're studied together
A 15-residue gastric peptide and a fragment of thymosin beta-4. What each one is, the honest state of the research, their regulatory and anti-doping status, and why they're supplied together.
8 September 2026 · 5 min
ReadGHK-Cu: the copper peptide, from 1973 to the research bench
A three-amino-acid peptide bound to a copper ion, first isolated from human plasma in 1973. Its chemistry, the cell and skin-model research, its use in cosmetics, and how it is supplied for research.
8 September 2026 · 4 min
ReadSemaglutide, tirzepatide, retatrutide: one, two and three receptors
The three names that dominate search, compared on what can honestly be compared: which receptors, whose molecule, what's licensed, and what's published. No numbers borrowed across trials.
8 September 2026 · 4 min
ReadHandling & storage
2 articlesPeptide storage: 2–8°C, light, and what the cold chain is for
Why 2–8°C, what heat and light do to a peptide, why freezing a solution is worse than not, and what a vendor's cold chain should look like from factory to your fridge.
8 September 2026 · 4 min
ReadPre-filled pens vs lyophilised vials: what the format changes
Freeze-dried powder in a vial, or solution in a sealed pen. The two formats research peptides are supplied in, what each asks of you, and where each one can go wrong.
8 September 2026 · 4 min
ReadSources, cited.
Every article that makes a factual claim about a compound links to the paper, the regulator or the standard it came from. If we can't cite it, we don't say it.
No outcomes, no advice.
Our products are supplied for laboratory research. The journal describes chemistry, analysis, handling and regulatory status — never what a compound does in a person, and never how anyone should use it.
Dated, and corrected in the open.
Each article carries the day it went live and the day it was last materially changed. When we get something wrong we fix it and say so in the article.
Research use only · Biovanta products are supplied for laboratory research and in-vitro study, not for human or veterinary consumption. Nothing in the journal is medical advice. Testing and certificates