oral vs injectable b12 Injections Supplements: Which are more effective? The Advantages of B12 Injections

GLP-1 agonists are FDA-approved for weight loss, offering the most consistent and proven results

While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]

Studies in aging-prone and cancer-prone rodent models highlight its relevance in the fields of gerontology and cancer biology 1,3,4

PMID 24994676

Data are lacking from long-term studies to assess whether oral treatment is effective when doses are administered less frequently than daily