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Description
The data isnt there to support safety, and we wont speculate

In reality, peptide solubility is usually a chemical problem driven by pH, charge distribution, and the peptides isoelectric point (pI)

But right now, we dont have the data to confirm this is definitively the case, and anyone selling you certainty on this point is misleading you (or doesnt know what theyre talking about)
This master chart provides your starting point
