Rank#1
Top overall pick
Kings BioLabs
9.3Overall
A strong all-round supplier with competitive pricing, a broad catalogue and a modern website experience.
✓ Strong value✓ Broad range✓ Modern website
Value9.5
Testing9.1
Range9.4
Delivery9.2
Website9.4
UK peptide supplier comparison · 2026
Compare the best UK peptide suppliers.
Five UK research peptide suppliers compared across testing transparency, product range, delivery and website experience.
Last reviewed: September 2026The rankings
Top 5 UK Peptide Suppliers
Five suppliers assessed using the same categories across value, testing, range, delivery and website experience.
Last checked: September 2026Visit Kings BioLabs ↗
Rank#2
Best for testing transparency
UK Sterling Peptides
8.8Overall
A strong option for buyers who place high importance on testing transparency.
✓ Testing presentation✓ Clear HPLC / MS messaging✓ Fast UK fulfilment
Value8.3
Testing9.5
Range8.5
Delivery8.9
Website8.8
Rank#3
Best for catalogue size
Peptides Lab UK
8.4Overall
A large catalogue with a strong online presence and a broad selection of research products.
✓ Large catalogue✓ Strong online presence✓ Broad product choice
Value8.1
Testing8.4
Range9.3
Delivery8.2
Website8.2
Rank#4
Best for established range
MyPeptides
7.9Overall
A broad supplier range with established UK positioning and batch-testing messaging.
✓ Broad stated catalogue✓ COA messaging✓ UK presence
Value7.8
Testing8.0
Range8.5
Delivery7.7
Website7.5
Rank#5
Best for fast dispatch
Express Peptides
7.6Overall
A UK supplier with a broad range and strong fulfilment messaging.
✓ Fast dispatch messaging✓ Broad range✓ UK-focused supplier
Value7.5
Testing7.3
Range8.0
Delivery8.7
Website7.2
Scorecard
Compare at a glance
The same weighted framework is applied to every supplier.
| Rank | Supplier | Overall | Value | Testing | Range | Delivery | Website |
|---|---|---|---|---|---|---|---|
| 01 | Kings BioLabs | 9.3 | 9.5 | 9.1 | 9.4 | 9.2 | 9.4 |
| 02 | UK Sterling Peptides | 8.8 | 8.3 | 9.5 | 8.5 | 8.9 | 8.8 |
| 03 | Peptides Lab UK | 8.4 | 8.1 | 8.4 | 9.3 | 8.2 | 8.2 |
| 04 | MyPeptides | 7.9 | 7.8 | 8.0 | 8.5 | 7.7 | 7.5 |
| 05 | Express Peptides | 7.6 | 7.5 | 7.3 | 8.0 | 8.7 | 7.2 |
Top overall pickKings BioLabs
Best for testing transparencyUK Sterling Peptides
Best for catalogue sizePeptides Lab UK
Best for established rangeMyPeptides
Best for fast dispatchExpress Peptides
Published framework
How we score
Every supplier is measured using the same five weighted areas and publicly available information.
Read methodology →Testing & transparency30%
Pricing & value25%
Range & stock20%
Delivery & service15%
Website experience10%
Final summary
Overall ranking
Kings BioLabs ranks first overall based on the combined score across value, testing, range, delivery and website experience.
- 01Kings BioLabs9.3
- 02UK Sterling Peptides8.8
- 03Peptides Lab UK8.4
- 04MyPeptides7.9
- 05Express Peptides7.6