At the 10mg/ml concentration, the difference between 25 units and 26 units is 0.1mg, a 4% dosing error on a 2.5mg dose
As ionic strength increases (adding salts), this repulsion is shielded, which in some cases can lead to increased aggregation or precipitation of the peptide (especially if the peptide has hydrophobic patches)
Prior to working with them, I had worked with other credentialing services that did not provide quality services (lack of communication, incomplete applications, and delays)
However, there are also cases when additional factors such as lack of sleep, poor diet, and deficiency of other vitamins like iron, folate, and others, contribute to the issue
A peptide dosage calculator can help estimate the correct syringe units