The quality is guaranteed
While most people can obtain sufficient B12 through their diet, certain groups are at higher risk of deficiency and may benefit from supplementation
Manufacturers typically assign a 2436 month expiration date for unopened vials stored between 2025C
Equivalent effects have not been established in people
Researched effects In a diet-induced-obese mouse study (Neelakantan et al., Biochemical Pharmacology, 2018), subcutaneous 5-Amino-1MQ (20 mg/kg, three times daily, roughly 11 days) produced about 5.1% body-weight loss versus continued weight gain in untreated controls, roughly 35% less epididymal white fat mass, smaller adipocytes, lower plasma cholesterol, and improved glucose tolerance, with no reported change in food intake and no observed adverse effects in the mice
This is one reason B12 injections for weight loss are frequently chosen for programs that aim for predictable absorption