shelf life of b12 injections Hi I bought the injectable liquid but there's no use by date on it or how long you have to use it once it's opened. Anyone know the answer? TIA x Self-Administering B12 Injections: A Step-by-Step

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The following comparison summarizes the key considerations: For patients with intact GI absorption, oral high-dose supplementation (1,000 to 2,000 mcg daily) provides a convenient and cost-effective path to correcting deficiency

Groups at higher risk of deficiency include older adults (due to reduced stomach acid production), people following vegan or strict vegetarian diets (as B12 is naturally found almost exclusively in animal products), individuals with pernicious anaemia or other malabsorption conditions, those taking certain medications such as metformin or proton pump inhibitors long-term, and people with significant nitrous oxide exposure (including recreational use), which can inactivate B12 in the body

Each ingredient targets a different step in fat processing

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In this situation, livestock may benefit from treatment with a short-acting selenium supplement, such as Cobalife VB12 Plus Selenium or MultiBoost with B12 for cattle