Therefore, you might have symptoms such as weak muscles, numbness, trouble walking, nausea, weight loss, irritability, fatigue, and increased heart rate
You can read more in our guide on how long it takes for B12 injections to work
Allergic Reactions In rare cases, some people may have a severe allergic reaction to ingredients in the B12 shot
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People with Certain Medications: Long-term use of medications like proton pump inhibitors or metformin can interfere with B12 absorption, leading to a deficiency
There's no universal 'best' here, just the 'best for your specific inquiry.' We encourage researchers to meticulously evaluate their project's unique requirements, consult with our expert team, and carefully consider the pharmacokinetic implications of each route