SPB reviews
SPB reviews: 15 independent lab tests across 4 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is SPB legit? Lab record: Mixed
How we rate- 15 independent tests
- 13 of 15 lots filled to label
- Median purity 99.9%
- 1 of 3 products graded D or E
Some of SPB's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Tirzepatide
SPB graded D. Paradigm Peptide's Tirzepatide graded A across 10 tests, $4.97 / mg.
Buy from Paradigm PeptideAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where SPB graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Tirzepatide
SPB: grade DSPB products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open SPB's site.
- RetatrutideAGREAT
- Tests
- 8
- Passed
- 100.0%
- GHK-CuAGREAT
- Tests
- 2
- Passed
- 100.0%
- TirzepatideDPOOR
- Tests
- 3
- Passed
- 66.7%
- Tests
- 2
- Passed
- —
What the testing shows
Across 15 measured samples from SPB, 2 came in more than 5% under the quantity on the label (13%). Another 2 measured more than 5% over. Purity across 15 readings ran from 95.2% to 99.9%, median 99.9%. Samples span Oct 2025 to Sep 2026.
- Under label
- 2/15
- Median purity
- 99.9%
- Latest sample
- Sep 2026
- Ships from
- China
more than 5% short
95.2%–99.9% range
first tested Oct 2025
per vendor listing
Our read on SPB
12 of SPB's 15 graded samples passed (80%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are improving: 82% passed over the latest six months, up from 75% before.
When a sample failed, the most common reason was purity under 99.5% (3 times).
Against the 302 shops with at least five graded tests, SPB's pass rate is at or above 69% of them, and it has more tests on record than 42% of them.
When and how SPB was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (11), BTLabs (4)
- Who sent the samples
- buyers 100%
- Batches covered
- 10 distinct batch numbers; 7 checked for endotoxins
Why SPB's failed samples failed
The 3 most recent failed tests, with the lab's reason.
Tesamorelin · Jun 22, 2026
purity under 99.5%
Tesamorelin · Apr 28, 2026
purity under 99.5%
Tirzepatide · Oct 30, 2025
purity under 99.5%
Lab testing results
Independent results across 4 products.
Individual lab tests
Date
9/24/2026
Purity
99.9%
Quantity
20 mg → 18 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Violet cap
Date
9/24/2026
Purity
99.9%
Quantity
20 mg → 19 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Violet cap
Date
9/16/2026
Purity
99.9%
Quantity
20 mg → 21.3 mg
Lab
BTLabs
Vial
No label / Silver crimp / Violet cap
Date
8/26/2026
Purity
99.9%
Quantity
50 mg → 42.3 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
Date
8/26/2026
Purity
99.9%
Quantity
10 mg → 9.53 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Clear Blue cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideNo label / Silver crimp / Violet cap | 9/24/2026 | 10.0 | 99.9% | 20 mg → 18 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / Violet cap | 9/24/2026 | 10.0 | 99.9% | 20 mg → 19 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / Violet cap | 9/16/2026 | 10.0 | 99.9% | 20 mg → 21.3 mg | BTLabs | View |
| GHK-CuNo label / Silver crimp / White cap | 8/26/2026 | 10.0 | 99.9% | 50 mg → 42.3 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / Clear Blue cap | 8/26/2026 | 10.0 | 99.9% | 10 mg → 9.53 mg | Krause Analytical | View |
Which SPB products tested best
Retatrutide and GHK-Cu have the strongest record, graded A or B.
Tirzepatide graded D or E: a large share of its samples missed purity or quantity thresholds.
Buying from SPB
If you order from SPB, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We don't track SPB's prices yet. Shipping, payment and refund terms are on their site.
The official store is t.me/+IJepOBYi87YwMWFl https://glp1forum.com/members/yuna-sspb.3687. Check the address before you pay.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track SPB
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
SPB: common questions
Is SPB legit?
We rate lab records, not businesses. Mixed lab record: 15 independent tests, 13 of 15 lots filled to label, median purity 99.9%, 1 of 3 products graded D or E. Each result links to its original certificate in the table above.
What do SPB reviews say?
We don't hold scored customer reviews for SPB yet. The independent lab results on this page are the evidence we have.
Which SPB peptides tested best?
We have graded 3 SPB products. Retatrutide and GHK-Cu graded A or B. Tirzepatide graded D or E.
Is there a SPB coupon code?
We don't have a verified SPB coupon code. A discount changes the price, not what is in the vial.
Where does SPB ship from?
Public listings place SPB's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from SPB?
Mixed lab record: 15 independent tests, 13 of 15 lots filled to label, median purity 99.9%, 1 of 3 products graded D or E.
About SPB
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