Spartan Peptides Review
Scored 3.38/10 on the published Peptide Source Review formula: lab credibility, shipping, pricing, operating history, and transparency.
- COAs on file
- 6
COAs on file
- Confirmed at the lab
- 6
Confirmed at the lab
- Products
- 17
Products
- Labs
- 1
Labs
3.38/ 10
- Lab credibility and recency55%3.4 (show how this was scored)
- Shipping and refund20%5.5 (show how this was scored)
- Pricing15%1.0 (show how this was scored)
- Operating history5%3.1 (show how this was scored)
- Business transparency5%2.0 (show how this was scored)
Weights are fixed for every vendor. Select a row to see how it was scored.
Testing gate applies (limit 6.00); this score is already below it
Third-party testing not established. The gate records that testing could not be verified; it is not a finding of a quality or safety problem.
Is Spartan Peptides legit?
Spartan Peptides scores 3.38 out of 10 (Poor, #87 of 100) as of November 6, 2026 and does not meet our testing gate: 6 of the 17 products we score carry a certificate, 6 confirmed with the issuing lab (a lab we grade A). Its strongest area is shipping and refunds (5.5/10) and its weakest is pricing (1.0/10); its operating history on record covers over a year.
On lab evidence, the heaviest-weighted factor, Spartan Peptides has no third-party testing we could independently verify, with COA work on record from MZ Biolabs. The testing gate applies because that testing could not be independently verified (Third-party testing not established); its limit for Spartan Peptides is 6.00, and this score is already below it. Its lowest price per milligram in our data is on NAD+ (see the table below).
How this score was calculated
Every point below follows the published tables in our methodology, with the policy wording we scored and a link to where we read it. Evidence last checked October 22, 2026. Lab credibility is worked product by product from the certificates on file.
Lab credibility3.4/10
Each carried product (lab supplies excluded) is scored from the certificate on file for it, on the published lab rubric: 3 for a published certificate, then points for the laboratory, the verification key, the tests on the certificate and its purity, held to 0 to 10. A certificate that is self-issued, names no laboratory, or comes from a laboratory whose independence is not established scores a flat 2.0; a product with no certificate, a certificate the laboratory’s own record fails, or a posted copy that differs materially from the laboratory’s copy scores 0. Calculated on , the day this page was built; the date each certificate was tested is shown on its row.
- BPC-1578.5
Certificate from MZ Biolabs, tier A · tested 2026-05-12
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.95% (99.7% or higher)
- TB-5008.0
Certificate from MZ Biolabs, tier A · tested 2026-05-12
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.44% (99.0% up to but not including 99.7%)
- GHK-Cu8.5
Certificate from MZ Biolabs, tier A · tested 2026-05-11
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.77% (99.7% or higher)
- Semax0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Tesamorelin8.5
Certificate from MZ Biolabs, tier A · tested 2026-05-12
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.97% (99.7% or higher)
- Retatrutide0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Tirzepatide0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Semaglutide0.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- PT-1410.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- AOD-96040.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- Pinealon0.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- MOTS-c8.5
Certificate from MZ Biolabs, tier A · tested 2026-05-12
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.75% (99.7% or higher)
Certificate from MZ Biolabs, tier A · tested 2026-05-12
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier A (MZ Biolabs)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.85% (99.7% or higher)
- Epitalon0.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- NAD+0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
Weighted mean of 17 products (6 non-core products without a certificate counted at half weight): 50.5 ÷ 14.0 = 3.607.
- −0.20LOT Lot numbers that do not identify a single batch (cap −0.2): lot PEP-04-26 printed on all six certificates (six compounds)
3.607 − 0.200 = 3.407, rounded to 0.1: 3.4/10.
Testing gate: 6 of 17 products have a certificate from a directory laboratory (not tier D, not self-issued) with the key confirmed at the laboratory. That is fewer than half, so the testing cap applies (see the methodology).
Shipping and refunds5.5/10
- +1
Returns and refunds
we cannot accept returns. In the rare occasion that your order arrives with missing, incorrect, or damaged items, please email us for assistance.
- +1
Lost or damaged parcels
If there's been no update for 10 business days ... we'll open a trace with the carrier. We look at every claim individually
- +1.5
Dispatch time
If your payment is confirmed before 2:00 PM Pacific on a weekday, your order goes out that same day.
- +1
Tracking on all orders
the second includes your carrier and tracking information once it ships
- 0
Payment you can dispute
If you pay by ACH or e-check, we ship as soon as the payment clears.
ACH or e-check is the only method stated.
- +1
Shipping rates published
Standard shipping is [price], and orders of [price] or more get free expedited shipping.
Total +5.5: 5.5/10.
Pricing1.0/10
We compared Spartan Peptides’s current single-vial prices on 17 products, each matched to the same product and milligrams per vial, with the median price of the other vendors. Its typical price (the median ratio across those products) is 201% above the market median (ratio 3.01), which the published scale maps to 1.0/10. checked
Operating history3.1/10
Counted from December 6, 2024, the earliest dated evidence of this business operating: 22.5 months as of October 22, 2026, which the published table maps to 3.1/10.
Earliest verifiable selling: first archived storefront of the current business 2024-12-06/07 (category menus, 'Buy PT-141 online' product pages, cart; prices rendered by script). Reddit customers cite it from 2025-02. The domain was a HugeDomains listing 2016-10 to 2021-12 and showed only redirects/'coming soon' 2024-08 to 2024-11. A 2015 'spartanpeptides.com' seller (clen/T3) predates the for-sale period and is not the same business.
- 2015-09-06 Dated public mention: 2015 mention of spartanpeptides.com selling clen/T3; earlier, unrelated operation (domain then for sale 2016-2021); not counted reddit.com (opens in new tab)
- 2024-08-14 Archived copy: redirect / coming soon (not selling) web.archive.org (opens in new tab)
- 2024-12-06 Archived copy: storefront with product catalogue and cart; prices are rendered by script and not present in the archived HTML web.archive.org (opens in new tab)
- 2025-02-21 Dated public mention: 'It's a little pricey, but it's a U.S. based company, Spartan peptides.' reddit.com (opens in new tab)
- 2016-08-12 Domain registration (context only): current domain spartanpeptides.com rdap.verisign.com (opens in new tab)
Transparency2.0/10
- 0
- 0
Business address
city only: "San Diego, California"; the only street address on the site is the testing lab’s
- 0
- 0
Named owner or staff
"The Spartan Research Team ... We are not a single author" (no names)
- +1
Dated terms with a governing law
Shipping policy "Effective: September 22, 2026"; terms: "will be governed by and construed in accordance with U.S. law"
spartanpeptides.com (opens in new tab) source 2 (opens in new tab)checked
- +1.5
Testing lab named, certificates published
Every Spartan Peptides compound is independently tested by MZ Biolabs, an analytical laboratory in Tucson, Arizona
- −0.5
GLP products sold only under code names
Product pages titled "GLP-3(Reta)" and "GLP-2(Tirz) 20mg"; neither page names retatrutide or tirzepatide
Total +2: 2.0/10.
- Lab re-checked on 2 November 2026 (issue #25): the TB-500 certificate ID was confirmed at MZ Biolabs, so all six MZ Biolabs certificates are confirmed at the laboratory. Epithalon 25 mg and NAD+ 750 mg, both in stock as single vials with no published certificate, were added to the products we list (17). Their single-vial prices were entered on 2 November 2026; the pricing subscore above is from the 15 products priced before that and is recomputed with the next market-median run.
Shop Spartan Peptides
- Rated 3.38/10 · Poor
- 6 COAs confirmed at the issuing lab
- Best value: NAD+ at $0.37/mg
Affiliate link: we may earn a commission if you buy. It never affects the score or rank.
Current Spartan Peptides offers
Peptide Stacks: Save 10% vs Buying Separately
Spartan Peptides homepage: Peptide Stacks Save 10%: Pre-bundled research peptide stacks combining 2-3 compounds for specific research applications. Save 10% vs buying components separately. Reflected automatically in stack pricing, no code needed.
Audit history and why the rating changed
We re-audit vendors against their live COAs and site. Here is what most recently moved this rating, and why.
See the full score history and chart
- Most recent audit · 3.32to3.38
Lab score recomputed under the published rule on 6 November 2026: lab 3.3 to 3.4.
- Audit · 3.43to3.32
Lab evidence re-checked on 2 November 2026. The TB-500 certificate's ID, read from its QR code, was confirmed at MZ Biolabs, so all six published certificates are now confirmed at the laboratory. Epithalon and NAD+, both sold on the site without a published certificate, were added to the products we list, so certificates cover 6 of 17 products and the third-party testing cap still applies. Lab 3.5 to 3.3.
- Audit · 2.94to3.43
Two products added on 24 October 2026: MOTS-c and the CJC-1295 no DAC / ipamorelin blend, both sold on the vendor's site and covered by MZ Biolabs certificates (lot PEP-04-26) confirmed at the laboratory. Lab 2.6 to 3.5.
Earlier audits (8)
- Audit · 2.66to2.94
Lab score recalculated on 22 October 2026 under the published core-product rule (A1b): a missing certificate on one of the 15 most widely carried products still counts fully, while on any other product it now counts at half weight, so a broad catalogue is not penalised as much for its breadth. Lab 2.1 to 2.6.
- Audit · 2.55to2.66
Claim deductions re-checked on 22 October 2026 under the published rule that a claim deduction applies only where a site claim is contradicted by what its certificates show, never for products merely lacking a certificate. Lab 1.9 to 2.1.
- Audit · 2.58to2.55
Re-scored on 22 October 2026 under the published rulebook, which now gives one rule for each judgement call and applies it to every vendor: transparency 2.5 to 2.0.
- Audit · 2.36to2.58
Re-scored on 22 October 2026 under version 2 of our published rules. The MZ Biolabs certificate IDs for BPC-157, GHK-Cu and Tesamorelin were confirmed at the laboratory, which raises those certificates. The testing gate is now computed from the certificates: 3 of 13 products have a certificate confirmed at a directory laboratory, fewer than the half required. Lab 1.5 to 1.9. Score 2.36 to 2.58.
- Audit · 3.34to2.36
Re-scored on 22 October 2026 under our published rubric for shipping, pricing, operating history and transparency, applied to every vendor the same day: prices re-read from the vendor's site and matched by milligrams per vial, operating history from the earliest dated evidence of the business, and policies scored item by item. shipping and refunds 6.5 to 5.5, pricing 3.3 to 1.0, operating history 9.0 to 3.1, transparency 5.3 to 2.5.
- Audit · 3.39to3.34
Lab score recalculated on 22 October 2026 under the uniform published rubric applied to every vendor: every listed product was rescored on the same fixed certificate points, with fixed deductions for one lot number printed on certificates for different compounds and site statements about testing that the certificates do not bear out. Lab 1.6 to 1.5.
- Audit · 5.26to3.39
Lab evidence re-checked on 20 October 2026 under our coverage rule, which counts a listed product with no published certificate as zero in the lab average. Certificates cover 4 of the 13 products we list that the vendor offers for sale. Lab 5.0 to 1.6.
- Audit · 4.76to5.26
Re-audited from live COAs. Verified 6 MZ Biolabs reports (identity + purity, no sterility/heavy-metals); shipping was raised. COA coverage is still thin across the catalog, which caps the score.
Editor’s notes
Spartan Peptides publishes MZ Biolabs (Tucson, Arizona) certificates for six compounds, which we read on 22 July 2026: BPC-157 (99.95%), GHK-Cu (99.77%), MOTS-c (99.75%), tesamorelin (99.97%), TB-500 (99.44%) and the CJC-1295/ipamorelin blend (99.85%). Each covers HPLC purity and MS identity only, with no endotoxin, sterility or heavy-metals testing. On 22 October 2026 we confirmed the BPC-157, GHK-Cu and tesamorelin certificate IDs at MZ Biolabs, on 24 October 2026 the MOTS-c and CJC-1295/ipamorelin IDs, and on 2 November 2026 the TB-500 ID, read from the QR code on the posted certificate, so all six are now confirmed at the laboratory. All six print the same lot code. Since 24 October 2026 we also list MOTS-c and the CJC-1295/ipamorelin blend, and since 2 November 2026 Epithalon and NAD+, all sold on the site. The six certificates cover 6 of the 17 products we list; the other eleven have no published certificate, including retatrutide, tirzepatide, semaglutide, semax, PT-141, AOD-9604, Epithalon and NAD+, which is why the lab score is low and the third-party testing cap applies. In May 2026 the site's quality page said it did not share laboratory reports; on 30 June 2026 it was publishing these six. When we re-read prices on 22 October 2026, they ran about three times the market median across the 15 products we compared. As of July 2026, orders before 2pm shipped the same day, free shipping applied above a minimum, and the company shipped to the US and Canada. The site gives a San Diego location but no street address, entity or founding year.
Spartan Peptides COAs and lab test results
One row per product: the certificate on file and how the lab rule reads it, the laboratory that issued it and its tier, the date it was tested, the purity it reports, and the lowest price per milligram we recorded (per IU or mL where a product is sold that way).
MZ BiolabsTier Atested
- Purity
- 99.95%
- Price per mg
- $19.90$199.00 / 10mgbest of 2 sizes
MZ BiolabsTier Atested
- Purity
- 99.44%
- Price per mg
- $33.50$335.00 / 10mgbest of 2 sizes
- Purity
- —
- Price per mg
- $5.30$159.00 / 30mg
MZ BiolabsTier Atested
- Purity
- 99.97%
- Price per mg
- $31.80$159.00 / 5mg
- Purity
- —
- Price per mg
- $16.81$269.00 / 16mgbest of 3 sizes
- Purity
- —
- Price per mg
- $25.00$250.00 / 10mg
- Purity
- —
- Price per mg
- $45.00$225.00 / 5mgbest of 2 sizes
- Purity
- —
- Price per mg
- $13.90$139.00 / 10mg
- Purity
- —
- Price per mg
- $19.80$99.00 / 5mg
- Purity
- —
- Price per mg
- $19.80$99.00 / 5mg
- Purity
- —
- Price per mg
- $14.90$149.00 / 10mg
- Purity
- —
- Price per mg
- $7.95$159.00 / 20mg
MZ BiolabsTier Atested
- Purity
- 99.75%
- Price per mg
- $14.90$149.00 / 10mg
MZ BiolabsTier Atested
- Purity
- 99.85%
- Price per mg
- $19.90$199.00 / 10mg
- Purity
- —
- Price per mg
- $7.96$199.00 / 25mg
- Purity
- —
- Price per mg
- $0.37$279.00 / 750mg
Learn more about what Spartan Peptides carries
Spartan Peptides: Frequently Asked Questions
Is Spartan Peptides legit?
Spartan Peptides scores 3.38 out of 10 (Poor, #87 of 100) as of November 6, 2026 and does not meet our testing gate: 6 of the 17 products we score carry a certificate, 6 confirmed with the issuing lab (a lab we grade A). Its strongest area is shipping and refunds (5.5/10) and its weakest is pricing (1.0/10); its operating history on record covers over a year.
Is there a Spartan Peptides promo code, coupon code, or discount code?
We do not have a verified Spartan Peptides promo code or coupon code right now. When Spartan Peptides runs a sale or issues a discount code, we post it here and on our promos page, so bookmark this page for the latest Spartan Peptides discount.
Does Spartan Peptides use third-party lab testing?
Not to our verification standard. Fewer than half of this vendor's scored products have a certificate from an independent laboratory in our directory (not tier D) whose verification key we confirmed at that laboratory, so the testing gate applies. This records what we could verify; it is not a finding of a quality or safety problem. Laboratories on the certificates we hold: MZ Biolabs.
Where can I see Spartan Peptides' COAs?
In the "Spartan Peptides COAs and lab test results" table on this page. We hold 6 certificates for Spartan Peptides, covering 6 of the 17 products we track, issued by MZ Biolabs. 6 products' certificates were confirmed at the issuing laboratory itself. Each row links the certificate, its lab, its test date and the purity it reports.
What peptides does Spartan Peptides carry?
Spartan Peptides carries BPC-157, TB-500, GHK-Cu, Semax, Tesamorelin, Retatrutide, Tirzepatide, Semaglutide, and 9 more. Current per-milligram pricing, COA links, and verification keys for each are in the comparison table on this page.
Is the Spartan Peptides review on Peptide Source Review affected by affiliate status?
No. All affiliate relationships are publicly disclosed and never change a vendor's score, rank, or gate status. Our scoring formula is published in full and applied identically to every vendor.
Want to understand how this score was built?
Read the full methodology or the editorial integrity policy. Disclosure: the link below is an affiliate link; it never affects the score.
Spartan Peptides3.38Poor
6 confirmed at the labAffiliate link