The choice of injection site often depends on the type of vitamin used, as some formulations are better absorbed in specific areas
USA 88 , 47084712 (1991)
[270] We refer readers to the CY 2022 OPPS/ASC final rule with comment period (86 FR 63873), the CY 2024 OPPS/ASC final rule with comment period (88 FR 82076), and the CY 2018 OPPS/ASC final rule with comment period (82 FR 52614 through 52614) for further background about the ECE policies for the Hospital OQR, REHQR, and ASCQR Programs, respectively
Shaking introduces air bubbles and can break peptide bonds, reducing the compounds effectiveness
Keep in mind, this is for product-selection education only and does not explain peptide dosing, peptide reconstitution, injection technique, or how much medication to draw into a syringe
Wainwright P, Narayanan S, Cook P Clinical biochemistry 2015