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Some individuals may experience mild nausea or digestive discomfort

Thaiss, C

You have an eye disorder called Leber's hereditary optic neuropathy (slow and painless loss of vision)

Your doctor may require regular blood tests to monitor your body's reaction to the injections

However, certain populations are at higher risk of deficiency: Adults over 50 (reduced absorption capacity) Individuals following vegan or strict vegetarian diets Those with gastrointestinal conditions such as Crohns disease or celiac disease Individuals taking long-term acid-reducing medications (PPIs, H blockers) When oral supplementation is insufficient or absorption is compromised, vitamin B12 shots deliver the nutrient directly into the bloodstream, bypassing the digestive system entirely

While side effects are generally rare, its important to be aware of the potential risks