Mannitol is a type of fructose sugar manufactured from corn starch and is used in the lyophilization (freeze drying) process. It serves to stabilize the peptide and prevent degradation. The amount of mannitol will vary between peptides, however is typically in the range of 250mg. 

 

Since a typical vial of peptides contains between 2mg and 10mg of peptide, there is much more mannitol in the vial than actual peptide compound. To be precise, approximately 96% to 99% of the contents of the vial is mannitol, not the active peptide itself.  

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MANNITOL-FREE PEPTIDES

 

In our mannitol-free peptides, only the active peptide compound is included in the vial. Unlike peptides with mannitol that contain about 255mg of volume (250mg mannitol + 5mg peptide, for example), the mannitol-free peptides only contain the 5mg. This has the effect of significantly less volume in the vial. Moreover, 5mg of peptide is a tiny amount when observed visually and sometime customers look at the vial and believe it's empty. For this reason, we include a card with all orders of mannitol-free peptides:

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For better perspective, shown below is a photo of an empty peptide vial (left) and a vial containing 5.2mg of BPC-157:

 

 

 

 

 

 

 

 

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BPC-157 vs. TB-500

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Most peptides have the consistency of fine salt. However, some peptides such as TB-500 has a lighter texture like dry snow. For the same weight, these peptides appear to have more volume. Here is a photo of 10mg BPC-157 (left) and 10mg TB-500 (right):

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WHAT IS BETTER? WITH or WITHOUT MANNITOL?

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It doesn't really matter. In both products, the equivalent amount of active compound is included.