Even with a healthy diet and exercise routine, many of us are walking around with nutrient deficiencies we dont even know about, leaving us feeling tired, foggy, sluggish, or simply not at our best
The evidence supports a limited association, not broad screening based on B12 alone
They can appear days to weeks after taking medication
A suitable oral regimen can replace vitamin B12 for many people, including some people with diet-related deficiency and some people for whom high-dose oral treatment is chosen despite suspected malabsorption
Understanding the distinct evidence base, regulatory status, and safety profile of each agent and the complete absence of clinical data on their combined use is essential for patients and healthcare professionals navigating this rapidly evolving and largely unregulated landscape