Easy to navigate Good Great service and fantastic product saw results in the first week
We expect you to cheat a little on special occasions
Certain medications may also interfere with absorption and cause deficiency, in particular, medicines prescribed for heartburn, antibiotics, blood pressure medicine, cholesterol-lowering drugs, diabetes medications and antipsychotic drugs
Olasupo Odunsi, MD, Medical Director Reviewed July 5, 2026 If you're constantly tired and your metabolism feels stuck, low B12 could be part of the problem
If youve just had your first vitamin B12 injection with us, you may be wondering when youll start to notice results
Qualitative and Quantitative Validation of the FACIT-Fatigue Scale in Iron Deficiency Anemia. Health and Quality of Life Outcomes 13 (2015): 60