Look for HPLC purity testing and mass spectrometry confirmation of the correct molecular weight
When adverse effects occurred, they were typically mild and transient, with the most common being mild to moderate headaches (similar frequency to placebo groups), minor injection site reactions (redness, slight swelling), and gastrointestinal effects at higher oral doses (nausea, diarrhea)
From 2D to 3D: novel nanostructured scaffolds to investigate signalling in reconstructed neuronal networks
Also supplied as a lyophilised vial, so it follows the same reconstitution workflow
Cloake et al., 2018
It's essential to underscore the significance of proper dosage, as excessively high vitamin levels can be equally, if not more, problematic than deficiencies