side effects of b12 injections How Quickly Does Shot Work? Does It Help to Lose Weight? how long do b12 injection

While animal-based foods like meat, eggs, and dairy are rich in B12, plant-based diets can lack this nutrient, making supplementation a common choice for vegans, vegetarians, and those with certain health conditions

This injectable form ensures rapid absorption and is especially valuable when oral supplementation is ineffective or not possible

Despite that risk, there are still easy ways to extend the shelf life of your B12 injections and keep them in good condition long after their expiration date

For older adults, especially if their diet is limited, supplemental B12 is usually recommended.[ref] Choosing the right type of vitamin B12 for your genes: Access this content: An active subscription is required to access this content

[65] [2] [80] For humans, the bioavailability from eggs is less than 9%, compared to 40% to 60% from fish, fowl, and meat