FSD reviews
FSD reviews: 19 independent lab tests across 5 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is FSD legit? Lab record: Mixed
How we rate- 19 independent tests
- 13 of 15 lots filled to label
- Median purity 99.75%
- 4 of 5 products graded D or E
Some of FSD's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested TB-500
FSD graded E. Tech-Wave Peptides's TB-500 graded A across 3 tests.
Buy from Tech-Wave PeptidesAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where FSD 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.
FSD 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 FSD's site.
- RetatrutideAGREAT
- Tests
- 7
- Passed
- 100.0%
- GHK-CuDPOOR
- Tests
- 4
- Passed
- 66.7%
- TirzepatideDPOOR
- Tests
- 3
- Passed
- 66.7%
- TB-500EBAD
- Tests
- 3
- Passed
- 50.0%
- BPC-157EBAD
- Tests
- 2
- Passed
- 50.0%
What the testing shows
Across 15 measured samples from FSD, 2 came in more than 5% under the quantity on the label (13%). Another 7 measured more than 5% over. Purity across 16 readings ran from 92.41% to 99.95%, median 99.75%. Samples span Jun 2025 to Aug 2026.
- Under label
- 2/15
- Median purity
- 99.75%
- Latest sample
- Aug 2026
more than 5% short
92.41%–99.95% range
first tested Jun 2025
Our read on FSD
12 of FSD's 16 graded samples passed (75%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are improving: 78% passed over the latest six months, up from 71% before.
When a sample failed, the most common reason was no purity figure on the certificate (3 times).
Against the 302 shops with at least five graded tests, FSD's pass rate is at or above 58% of them, and it has more tests on record than 49% of them.
When and how FSD was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (12), BTLabs (7)
- Who sent the samples
- buyers 100%
- Batches covered
- 5 distinct batch numbers; 3 checked for endotoxins
Why FSD's failed samples failed
The 4 most recent failed tests, with the lab's reason.
GHK-Cu · Aug 6, 2026
amount in the vial more than 35% off the label
BPC-157 · May 8, 2026
purity under 99.5%; amount in the vial more than 35% off the label
Tirzepatide · Nov 25, 2025
purity under 99.5%
TB-500 · Jun 29, 2025
purity under 99.5%
Lab testing results
Independent results across 5 products.
Individual lab tests
Date
8/6/2026
Purity
99.8%
Quantity
5 mg → 5.3 mg
Lab
BTLabs
Vial
No label / Silver crimp / White cap
Date
8/6/2026
Purity
99.7%
Quantity
50 mg → 83.9 mg
Lab
BTLabs
Vial
No label / Silver crimp / White cap
Date
8/6/2026
Purity
99.6%
Quantity
5 mg → 5.5 mg
Lab
BTLabs
Vial
No label / Silver crimp / Black cap
Date
8/6/2026
Purity
99.6%
Quantity
5 mg → 6 mg
Lab
BTLabs
Vial
No label / Silver crimp / White cap
Date
8/5/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Silver crimp / Black cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| TB-500No label / Silver crimp / White cap | 8/6/2026 | 10.0 | 99.8% | 5 mg → 5.3 mg | BTLabs | View |
| GHK-CuNo label / Silver crimp / White cap | 8/6/2026 | 10.0 | 99.7% | 50 mg → 83.9 mg | BTLabs | View |
| RetatrutideNo label / Silver crimp / Black cap | 8/6/2026 | 10.0 | 99.6% | 5 mg → 5.5 mg | BTLabs | View |
| BPC-157No label / Silver crimp / White cap | 8/6/2026 | 10.0 | 99.6% | 5 mg → 6 mg | BTLabs | View |
| RetatrutideNo label / Silver crimp / Black cap | 8/5/2026 | — | — | BTLabs | View |
Which FSD products tested best
Retatrutide has the strongest record, graded A or B.
GHK-Cu, Tirzepatide, TB-500 and BPC-157 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from FSD
If you order from FSD, 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 FSD's prices yet. Shipping, payment and refund terms are on their site.
The official store is peptide.chat/invite/MxG16KMP. 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 FSD
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
FSD: common questions
Is FSD legit?
We rate lab records, not businesses. Mixed lab record: 19 independent tests, 13 of 15 lots filled to label, median purity 99.75%, 4 of 5 products graded D or E. Each result links to its original certificate in the table above.
What do FSD reviews say?
We don't hold scored customer reviews for FSD yet. The independent lab results on this page are the evidence we have.
Which FSD peptides tested best?
We have graded 5 FSD products. Retatrutide graded A or B. GHK-Cu, Tirzepatide, TB-500 and BPC-157 graded D or E.
Is there a FSD coupon code?
We don't have a verified FSD coupon code. A discount changes the price, not what is in the vial.
Ordering from FSD?
Mixed lab record: 19 independent tests, 13 of 15 lots filled to label, median purity 99.75%, 4 of 5 products graded D or E.