Research buying guide
Choosing between GHK-Cu 50 mg and 100 mg is a purchasing decision about quantity, price and sealed units. This guide helps you compare the two formats without confusing a larger vial with a different molecular identity or a higher purity result.
A 100 mg vial contains twice the declared amount of a 50 mg vial. It offers a lower cost per declared milligram only when its price is less than twice the 50 mg price. Confirm the documentation for the selected size and shipping lot before ordering.
What changes between 50 mg and 100 mg?
GHK-Cu is the copper complex of the glycyl-histidyl-lysine tripeptide. A change in the amount on the label does not, by itself, change that identity. It also does not tell you the copper content, measured peptide content or chromatographic purity of the material.
| Purchasing question | 50 mg vial | 100 mg vial |
|---|---|---|
| Declared amount per vial | 50 mg | 100 mg |
| Two-vial order | 100 mg total nominal amount | 200 mg total nominal amount |
| Ten-vial order | 500 mg total nominal amount | 1,000 mg total nominal amount |
| Analytical evidence | Confirm the applicable record | Confirm the applicable record |
These totals describe label quantities. They are not independently measured content results or preparation instructions. Use the selected variation and order summary, rather than a photograph alone, to record what you are purchasing.
Compare value with a simple price threshold
Divide the current vial price by its declared milligrams to compare nominal unit cost. For the two sizes here, the larger vial is cheaper per declared milligram when P100 < 2 × P50, where P100 and P50 are their current prices.
For example, if a 50 mg vial hypothetically cost $30, a 100 mg vial would need to cost less than $60 to offer a lower nominal cost per milligram. This is an illustration, not SRL pricing. Use the live selector for actual prices and the cart for any applicable discounts.
Compare the delivered total as well. Shipping, the required number of sealed units and confirmed savings can change the purchase that best fits a project. A cheaper nominal milligram is not evidence of equivalent analytical quality.
One large vial or two smaller sealed units?
One 100 mg vial and two 50 mg vials both total 100 mg nominally, but they provide different numbers of sealed containers. If a project needs separate receiving records or unopened units for different workstreams, that distinction can matter more than unit price.
For repeat or multi-unit orders, confirm the allocated lots before assuming the units share one record. The GHK-Cu 10-pack listing describes a different ordering format, not a different identity. Check its selected amount per vial and unit count.
What the published SRL record actually covers
SRL’s public library includes a GHK-Cu record labeled 100 mg for lot SRL-CU-101. It is one documented sample record, not blanket certification of every 50 mg or 100 mg option or future shipment. A 100 mg sample report does not independently establish the measured content of a 50 mg vial.
Open the published GHK-Cu lot record and compare it with the lot being offered. If the selected size or shipping lot is not covered, ask support for the applicable documentation before accepting it for a project.
The GHK versus GHK-Cu comparison addresses copper complexation and identity. That is a separate question from choosing a vial size.
Frequently asked purchasing questions
Is 100 mg GHK-Cu more concentrated than 50 mg?
The vial label states an amount. It does not establish a solution concentration, which would also require a defined volume. This guide does not provide preparation or administration instructions.
Does 100 mg mean higher purity?
No. Amount and purity are different attributes. Compare each applicable report’s methods, identifiers and results.
Where can I compare SRL’s current GHK-Cu options?
Use the GHK-Cu 50 mg and 100 mg single-vial listing for the current 50 mg and 100 mg selector, then compare the 10-pack if multiple sealed units are required.
Sources and scope
- Siméon et al., fibroblast-culture research involving GHK-Cu supports the copper-complex identity and laboratory context; it does not certify an SRL lot.
- SRL GHK-Cu listing and published lot record supply the current catalog and documented-sample context.
Reviewed October 13, 2026. Commercial terms and lot availability can change. For further analytical context, read GHK-Cu research and analytical interpretation.