The bottom line is that measurements of free IGF-I have not been demonstrated to better predict different physiological or pathophysiological conditions in humans and do therefore not provide any clinically important contributions (114, 112)
This limits your safe laboratory testing window to less than 24 hours before bacterial contamination risks arise
Most companies wont do this, which shows how much they stand behind their products
This makes provider review, product sourcing, dosing, and monitoring especially important
Zhu Z, Zhang F, Hu H, Bakshi A, Robinson MR, Powell JE, et al
Because of its structure, analog length, handling sensitivity, and method-dependent analytical behavior, a single reported purity percentage may not fully represent the practical quality or research suitability of the batch