NEW SITE — FASTER TURNAROUND, MORE LABS. READ ON
Free peptide testing

Ordered TB-500 from ZLZ Peptide? Mail in a sample (US only) and let us test it for free.

Test my supply
+6 more ↓
37%
Finnrick rating
#30 of 58 TB-500 vendors
2 of 6 classifiable tests passed
natural 33% · customers 4.1★ (2)
methodology · Purity focus
Finnrick analysis · TB-500

ZLZ Peptide's TB-500 signal is pulled down by repeated purity misses, including 91.03%, 85.85%, and a recent 99.3% result just below the purity-focus cutoff. Identity and fill were consistent, but batch IDs are absent across tests.

methodology →
vendor intelligence report
Vendor Intelligence Report: ZLZ Peptide

Corporate and B2B records trace ZLZ’s storefront to a Hunan chemical-intermediate operator with BMK/PMK precursor listings. The report also maps altered-COA allegations, alias-led sales channels, irreversible payment rails, and lookalike-domain risk.

30 pages7 risk factors assessed3 Jul 2026
read the report
Peptides
#
Peptide
$/MG
Rating
N
1
Retatrutide
$0.75
91%
107
2
GHK-Cu
$0.07
85%
19
3
Tirzepatide
$0.43
85%
96
4
Semaglutide
$0.49
73%
12
6
PT-141
$0.62
71%
3
7
Melanotan II
$0.54
66%
2
9
Sermorelin
$1.52
55%
5
10
BPC-157
$0.68
48%
13
11
Tesamorelin
$2.00
43%
18
12
CJC-1295
-
42%
5
13
TB-500selected
$1.76
37%
6
14
NAD+
$0.02
20%
4
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%9 Oct 2025: 12%23 Oct 2025: 11%25 Nov 2025: 9%29 Dec 2025: 21%13 May 2026: 33%15 Jul 2026: 37%29 Sep 2026: current 37%12%33%37%Oct 25Sep 26
Showing TB-500 tests only
ZLZ Peptide TB-500 test history
COA-backed lab tests

About ZLZ Peptide test results from Finnrick

ZLZ Peptide is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 14 peptides and 299 tests, including ratings, observed price signals, recent test dates, and correction history where available.

Finnrick ratings are calculated from published sample data using the selected rating standard. The default standard evaluates purity, dose accuracy, and label quality, then adjusts low-volume results so small sample counts do not appear more certain than the data supports.

The most visible ZLZ Peptide peptides in this dataset are Retatrutide (107 tests) and CJC-1295 (5 tests). Use the peptide table above to compare the current Finnrick rating, price per mg, and sample volume for each peptide.

Recent tests and corrections are shown below when available. Samples may be acquired by Finnrick directly or submitted through Finnrick testing programs; the goal is to make safety and supply-chain evidence easier to evaluate than vendor marketing claims alone. This page currently lists 200 recent tests.

Corrections
No corrections.
Free peptide testing

Ordered TB-500 from ZLZ Peptide? Mail in a sample (US only) and let us test it for free.

Test my supply