See what a recent study found in the "What It Does" sections of our Calcium Supplements Review and Vitamin D Supplements Review
B-complex injections combine several B vitamins that support adrenal function, metabolism, mood, and cellular energy
Their research guidelines page is a solid resource too: it covers proper storage (temperature/light/moisture control), labeling for traceability, structural notes (e.g., DAC vs non-DAC), and quality verification, all reinforcing best practices that align perfectly with careful reconstitution
Although not as statistically meaningful, other supplements were associated with the following increases in the risk of death during the study: multivitamins (2.4%), vitamin B6 (4.1%), folic acid (5.9%), magnesium (3.6%), zinc (3.0%), and copper (18.0%)