With Peptide Sciences gone, thousands of researchers need reliable replacements for the compounds they trusted from that vendor. This guide maps every major Peptide Sciences product category to the best current alternatives, with direct comparison on quality, pricing, and testing standards.
For BPC-157 and Healing Peptides (TB-500, GHK-Cu)
Peptide Sciences was highly regarded for their healing peptide lineup. The best replacements:
First choice: Modified Aminos (modifiedaminos.shop) — US-manufactured, same-day shipping, rigorous COAs. Their BPC-157 and TB-500 are consistently top-rated in community reviews. Use code BRE for 10% off.
Second choice: PeptideTech (peptidetech.co) — QR-code COA on every vial, excellent quality control. Use code BRE for 10% off.
What to expect: Both alternatives match or exceed Peptide Sciences' quality standards for healing peptides. Pricing is comparable.
For GH Peptides (Ipamorelin, CJC-1295, Sermorelin, GHRP-6)
Peptide Sciences had one of the better GH peptide catalogs. Current alternatives:
First choice: Vandl Labs (vandl-labs.com) — carries the full GH peptide spectrum including Sermorelin, Ipamorelin, CJC-1295 (with and without DAC), GHRP-6, and GHRP-2. Use code BRE for 10% off.
Second choice: PeptideTech — strong GH secretagogue lineup with COA verification.
Also available at Modern Aminos (modernaminos.com) at competitive pricing. Use code BRE for 10% off.
For GLP-1 Compounds (Semaglutide, Tirzepatide)
GLP-1 availability has changed significantly since Peptide Sciences closed. The FDA crackdown on compounded semaglutide reduced the number of vendors who can legally sell it.
Best current source: FelixChem (felixchem.is) — GLP-1 specialist with semaglutide and tirzepatide availability (subject to ongoing regulatory situation). Use code BRE10 for 10% off via [felixchem.is/refer/642/](https://felixchem.is/refer/642/).
Important note: The legal landscape for research semaglutide has changed significantly since Peptide Sciences' heyday. Always verify current availability and legal status in your jurisdiction.
For Nootropic Peptides (Semax, Selank, Dihexa)
Peptide Sciences carried a selection of cognitive peptides that are harder to source. Current options:
Vandl Labs carries Semax and Selank (including N-Acetyl variants) as nasal sprays — the preferred delivery form for these compounds.
Modern Aminos stocks several nootropic peptides at competitive pricing.
Specialty consideration: N-Acetyl Semax Amidate and N-Acetyl Selank Amidate (the most potent variants) have more limited availability than standard forms. Vandl Labs is currently the most reliable source.
Quality Comparison: Peptide Sciences vs Current Alternatives
COA standards: PeptideTech's QR-code COA system is arguably superior to what Peptide Sciences offered — batch-specific, scannable, and real-time.
Product breadth: Vandl Labs' 95+ compound catalog exceeds what Peptide Sciences stocked at any given time.
Pricing: Current vendors are generally slightly more affordable than Peptide Sciences was, due to increased market competition.
The gap that remains: Peptide Sciences' reputation was built over ~12 years. The current vendors are 2-5 years old in most cases. The community trust that Peptide Sciences earned over time hasn't fully transferred to any single replacement — it's distributed across the vendors listed here.
Key Takeaways
No single vendor has fully replaced Peptide Sciences, but the combination of PeptideTech (quality + COA), Modified Aminos (healing peptides), Vandl Labs (broadest selection), FelixChem (GLP-1s), and Modern Aminos (value pricing) covers everything Peptide Sciences carried.