Common Causes of B12 Deficiency There are many reasons why you might not get enough B12
Collagen production Collagen is the basic building block that gives your skin strength, structure, and elasticity (9)
Intramuscular Injection Advantages This method is easy and accessible If healthcare professionals or family is not available, you can do it yourself
Anecdotally, some users report experiencing gastrointestinal issues like nausea, diarrhea, or constipation, as well as headache, fatigue, or irritation at the injection site
Oral B12 supplements are absorbed at roughly 1 to 5% in healthy adults, and even less in people with low intrinsic factor, atrophic gastritis, or gut absorption issues
Because it is a small molecule, it is studied orally/sublingually in the literature