In our experience, if you use proper sterile procedures and refrigerated storage, you can continue sampling from the same reconstituted vial for 3+ months
However, most people eating varied diets aren't actually deficient
References Ishikawa-Yamauchi Y, Emori C, Mori H, Endo T, Kobayashi K, Watanabe Y, et al
Controlled storage and handling ensure reliable experimental results
PBS NewsHour: FDA advisory panel considers use of peptides Public-interest coverage of the advisory proceedings
Evidence-Based, Next-Generation Therapies We use only clinically validated technologies and protocols, including Fotona, Lutronic Ultra, Multifrax, Genius RF, medical-grade injectables, cellular optimization therapies, & scientifically supported metabolic treatments