The standard and accepted guideline is that an opened vial of bacteriostatic water should be discarded 28 days later, regardless of how much solution is left
Koriyama Y, Nakayama Y, Matsugo S, Sugitani K, Ogai K, Takadera T, et al
Side-by-Side Comparison Parameter Receptors Cagrilintide AMY1R/2R/3R + CTR Semaglutide GLP-1R Tirzepatide GLP-1R + GIPR Retatrutide GLP-1R + GIPR + Glucagon-R Parameter Half-life Cagrilintide ~7-8 days Semaglutide ~7 days Tirzepatide ~5 days Retatrutide ~6 days Parameter Dosing frequency Cagrilintide Once weekly Semaglutide Once weekly Tirzepatide Once weekly Retatrutide Once weekly Parameter Max studied dose Cagrilintide 4.5 mg/week (mono) Semaglutide 2.4 mg/week Tirzepatide 15 mg/week Retatrutide 12 mg/week Parameter Peak monotherapy weight loss Cagrilintide 11.8% at 68 wk Semaglutide 14.9-17% at 68 wk Tirzepatide 22.5% at 72 wk Retatrutide ~24% at 48 wk Parameter FDA status (June 2026) Cagrilintide Investigational Semaglutide Approved (2021) Tirzepatide Approved (2023) Retatrutide Investigational Parameter HbA1c reduction (T2D) Cagrilintide ~0.9 pp mono

Consistently, the livers of HFD-fed mice showed increased IKK--SSG levels, decreased IKK- phosphorylation, and suppressed NF-B activation when compared to these from control animals
Additionally, the risk of deficiency goes up as we age because our body naturally produces less intrinsic factor
Therefore, its protective effect overlaps with GPX-1