Explainer
Are peptides legal in the UK? What 'research use only' means
Are peptides legal in the UK? A plain-English look at unlicensed medicines, 'research use only' labels, prescription-only items and what the risks are.
Comparison
BAC water vs sterile water vs acetic acid: which to use
Compare bacteriostatic water, sterile water for injection and dilute acetic acid for mixing peptides: what each is, when it is used, and the trade-offs.
Comparison
BPC-157 vs TB-500: differences and why they're stacked
BPC-157 vs TB-500 explained in plain English: where each comes from, how they differ, why people combine them, and what the evidence actually shows.
Explainer
Growth hormone secretagogues explained: GHRH vs GHRP
GHRH vs GHRP explained: how sermorelin, CJC-1295, tesamorelin, ipamorelin, GHRP-2, GHRP-6 and hexarelin work, why pairs are used, and the side effects.
Safety
How to inject peptides safely: sites, needles and sharps
How to inject peptides safely: subcutaneous technique, injection sites, needle sizes, single-use rules, sharps disposal and the signs of infection to watch for.
Guide
How to read a peptide certificate of analysis (COA)
What a peptide COA shows, how to read HPLC purity and mass spec results, why batch numbers and independent labs matter, and the red flags to watch for.
Guide
How to reconstitute peptides: step-by-step guide
Plain-English guide to reconstituting freeze-dried peptides: which water to use, the syringe maths, sterile technique, labelling and how long a vial lasts.
Safety
How to spot fake or under-dosed peptides: red flags
Red flags for fake, contaminated or under-dosed research peptides: dodgy testing, pricing, labels, vial appearance and what to do if something seems wrong.
Guide
How to store peptides: powder, reconstituted and travelling
How to store peptides: freeze-dried powder, reconstituted vials, freezing, light, freeze-thaw cycles, shipping heat and travel, with honest shelf-life ranges.
Explainer
Peptide blends explained: GLOW, KLOW and the Wolverine stack
What GLOW, KLOW and the Wolverine stack actually contain, how fixed ratios work, how to read a blend label, and why separate vials give more control.
Explainer
Peptide dosing maths: mg, mcg, IU and insulin syringe units
Clear worked examples for converting mg, mcg, IU and insulin syringe units, plus the common mistakes that cause tenfold dosing errors and how to avoid them.
Safety
Peptide side effects: what's normal and when to stop
Peptide side effects explained: which injection-site reactions are common, and which red flags such as fever, spreading redness or chest pain mean stop.
Explainer
Peptides and drug testing: WADA, sport and workplace tests
Peptides and drug testing explained: how WADA's prohibited list treats peptide hormones and unapproved substances, and why workplace tests rarely look for them.
Comparison
Semaglutide vs tirzepatide vs retatrutide compared
Semaglutide vs tirzepatide vs retatrutide: how they differ by mechanism (GLP-1, GIP, glucagon), which are licensed, and what unlicensed use really means.
Explainer
What are research peptides? A plain-English introduction
What are research peptides? How peptides differ from proteins, hormones and small-molecule drugs, why vials say 'research use only', and the main categories.
News
FDA panel narrowly backs compounding of six peptides
In July 2026 an FDA advisory committee voted to recommend BPC-157, TB-500 and four more peptides for compounding. The votes are not binding. Here is the detail.
News
MHRA seizes 12,000 doses in its largest-ever raid
In May 2026 the MHRA raided a Northamptonshire estate holding about 12,000 doses of unlicensed retatrutide, tirzepatide and peptide products. Two arrests.
News
Retatrutide phase 3: up to 30% weight loss, still unapproved
Lilly reported phase 3 TRIUMPH results for retatrutide in 2026, with large weight loss. It remains unapproved, so grey-market "reta" is still unlicensed.
News
FDA proposes ending bulk compounding of GLP-1 drugs
On 30 April 2026 the FDA proposed excluding semaglutide, tirzepatide and liraglutide from the 503B bulks list. What it means for compounded GLP-1s.
News
FDA approves orforglipron, the first GLP-1 weight-loss pill
Lilly's once-daily oral GLP-1 orforglipron (Foundayo) was approved by the FDA on 1 April 2026 for obesity. What the trials showed and what it means.
News
FDA: "research use only" labels do not shield sellers
A March 2026 FDA warning letter to Gram Peptides rejects "not for human consumption" labels on retatrutide and tirzepatide. What it means for buyers.
News
MHRA shuts first UK illicit weight-loss pen factory
The MHRA raided a Northampton warehouse making fake tirzepatide and unlicensed retatrutide pens. Here is what was found and what it means for buyers.
News
WADA 2026 Prohibited List: peptide clarifications
WADA approved its 2026 Prohibited List in September 2025 with extra examples and clarifications for peptide hormones and growth factors. What to know.