Choline is used to build cell membranes, maintain healthy liver and muscle function, and produce brain chemicals that regulate mood and memory
Vitamin B12 does have the potential to react with certain medications including chloramphenicol, proton pump inhibitors, H2 receptor antagonists, and Metformin
Different techniques are used to ensure quality control of finalized preparation like HPLC (high performance liquid chromatography) or gas chromatography, spectrophotometry, UV detection, measurement of osmolality & pH etc
Yes, B12 injections are generally considered very safe, even without a diagnosed deficiency
[2] Campagna, R., et al
Established suppliers with years of positive feedback are safer bets than new operations