PS Peptides and Synthesis Peptides both list a 10% code, rechecked November 2, 2026: NOW10OFF and PEP2026. The codes tie on percentage. Synthesis stands out for its searchable library of batch certificates from three labs in the reports we opened; PS Peptides has a documented code-plus-bundle result and lists more international shipping destinations. Compare the exact products and current checkout totals.
| Question | PS Peptides | Synthesis Peptides |
|---|---|---|
| Verified code | NOW10OFF, 10% off |
PEP2026, 10% off |
| Other savings | 3% or 5% bundle price stacked in our BPC-157 test | Paid membership adds shipping and points; code stacking with perks untested |
| Lab evidence | Product-page reports, including multiple safety panels on inspected batches | Searchable COA library; Freedom Diagnostics, ILS and Kovera reports inspected |
| Shipping | US, Canada, EU, UK, Australia listed | US only; free over $250 or with certain paid memberships |
Which store is easier to audit by lot?
Synthesis’ COA library held 121 certificates when we checked in October 2026, searchable by product or lot. The reports we opened came from Freedom Diagnostics, ILS Laboratories and Kovera Labs. Some included endotoxin, microbial-screen and heavy-metal results. PS Peptides links reports on product pages; the North American Diagnostics retatrutide and tesamorelin reports we inspected covered purity, content and several additional panels. For either store, match the lot number and read the actual test list before ordering.
Which discount should a repeat buyer compare?
Synthesis’ paid VIP plan advertises free 2-day shipping, points and early access. Those benefits have a monthly price, and we have not tested whether PEP2026 combines with every membership perk. PS Peptides’ NOW10OFF stacked with its bundle price in our September 2026 cart test, without a paid membership. For an occasional order, compare the whole cart; for frequent orders, include membership cost in the calculation.
Our PS Peptides guide and Synthesis Peptides coupon guide hold the underlying evidence. We earn a commission if you order through our links or codes. Products are for laboratory research only, not human or animal use.
Frequently Asked Questions
Does PEP2026 stack with Synthesis VIP perks?
We have not tested every combination. Check the order total and the membership charge before deciding which offer is better.
Does Synthesis Peptides ship outside the US?
Its published shipping policy is US-only. PS Peptides lists several international destinations.