Choosing a strength: 5 mg, 10 mg or more?

The strength on the label is the net amount of peptide in the vial, in mg. A 10 mg vial holds twice as much material as a 5 mg vial. The concentration only arises when you dissolve the powder, and depends on the volume of solvent you add.

Divide the price of a vial by the number of mg. A 5 mg vial at €40 costs €8 per mg; a 10 mg vial at €65 costs €6.50 per mg. A larger vial is often cheaper per mg, but not always: check it per product.

For most products the product cards in the shop already show the price per mg next to the price, so you can compare strengths and products directly.

How much solvent you add determines the concentration: the amount of peptide divided by the volume. Dissolve 5 mg in 2 ml and you get 2.5 mg/ml; 10 mg in 2 ml gives 5 mg/ml. For the same concentration from a larger vial, add proportionally more solvent.

The peptide calculator works this out in mg/ml and µg/ml. Mind the vial itself too: it only holds a limited volume of solvent.

A peptide is less stable in solution than as a powder. Following common lab guidance, you use a solution in bac water within about 28 days. If you dissolve a large vial while you only need part of it, the rest may go to waste. Two smaller vials, the second dissolved only when you need it, can then be more economical than one large one.

Examples of products in several strengths: BPC-157 and TB-500 (5 mg and 10 mg), Semax (5, 10 and 30 mg) and GHK-Cu (50 and 100 mg).

• How much material your work needs in total, and over what period.
• The price per mg of each strength.
• Whether you will use the whole vial while the solution keeps.
• Whether the certificate belongs to the lot you buy.

Is 10 mg stronger than 5 mg?

It is the same substance in a larger amount, not a different substance. How concentrated your solution becomes is up to you, through the volume of solvent.

Which is cheaper: two 5 mg vials or one 10 mg vial?

Work out the price per mg. A large vial is often cheaper per mg, but two small vials can be more economical if you dissolve the second one later.

Where do I find the price per mg?

For most products on the product card in the shop, next to the price of the chosen strength.

Does every vial come with a certificate?

A certificate belongs to one lot. Check on the certificate which product and lot it belongs to, and compare that with the lot number on your vial.

• View BPC-157 in the shop
• View TB-500 in the shop