peptide

GHK-Cu

Cosmeticalso known as Copper Tripeptide-1, Glycyl-L-histidyl-L-lysine copper

A naturally occurring copper-binding tripeptide. Plasma levels in humans decline substantially with age.

Extensively studied in topical and cosmetic research for its effects on collagen synthesis, antioxidant signaling, and wound-healing markers in skin models. Common ingredient in over-the-counter cosmetic formulations.

58 vendors with finnrick test grades. Higher grade = higher confirmed purity. Pricing data is pending for this peptide — grades below reflect independent purity testing.

#VendorGradeScoreTestsReputation
1
Great
A10.0254
2
Great
A9.2391
3
Great
A8.7477
4
Great
A8.6673
5
Great
A8.5278
6
Great
A8.4385
7
Great
A8.2378
8
Coffee and Pepperslogin required
Great
A8.2273
9
Aminos Researchlogin required
Great
A8.0286
10
Great
A8.0473
11
Great
A8.0473
12
Polaris Peptideslogin required
Great
A8.0373
13
Great
A7.4676
14
Great
A7.2271
15
Great
A7.2466
16
Great
A7.2263
17
Great
A7.2460
18
Good
B8.1666
19
Good
B7.9871
20
Good
B7.7462
21
Good
B7.2572
22
Good
B6.81067
23
Good
B6.71565
24
Okay
C8.11278
25
Okay
C7.93171
26
Okay
C7.82174
27
Okay
C7.8872
28
Okay
C7.6874
29
Okay
C7.5770
30
Okay
C7.3664
31
Utherflag
Okay
C7.1774
32
Okay
C7.11770
33
Okay
C7.1669
34
Okay
C7.0876
35
Okay
C6.91470
36
Okay
C6.91167
37
Okay
C6.8969
38
Okay
C6.8769
39
Okay
C6.41066
40
Okay
C6.1769
41
Okay
C6.1767
42
Okay
C5.9351
43
Okay
C5.5462
44
Okay
C5.4664
45
Okay
C5.1558
46
Okay
C5.0443
47
Poor
D6.22174
48
Poor
D4.9554
49
Fraud
F7.52068
50
Fraud
F7.41170
51
Unrated
X9.8165
52
Unrated
X5.5172
53
Unrated
X4.1157
54
Bad
E7.31269
55
Bad
E6.64569
56
Bad
E6.2676
57
Bad
E6.0765
58
Bad
E4.9764

Grades sourced from finnrick.com. Grade A = highest confidence in purity based on independent lab testing. Score is averaged across 459 individual tests.