Experts recommend taking 2.4 micrograms of vitamin B-12 each day
When anemia is present, i.e., low levels of the oxygen carrier hemoglobin, it results in impaired oxygen delivery, which affects not only cognitive function but also physical performance and perception of fatigue and tiredness
If your diet is solid, your gut works fine, and you have no symptoms, you're probably wasting your money
Trials that specifically enroll healthy adults with normal B12 and ask whether supplementation suppresses hunger or causes weight loss are few and generally small or uncontrolled
Disclaimer & Editorial Standards The health-related content published on this site is based on credible scientific sources and is periodically reviewed to ensure accuracy and relevance
B12 shots can be an effective part of treatment for those feeling unusually tired or those diagnosed with anemia