Observational studies A large number of cross-sectional and prospective cohort studies have associated elevated blood homocysteine concentrations with measures of poor cognitive scores and increased risk of dementia, including Alzheimer's disease (reviewed in 67, 69)
That's the manufacturer's guideline and the standard the research community follows
Or is it pernicious anemia, an autoimmune condition that requires lifelong B12 treatment
How to Switch from Pills to Injections If you have been taking oral supplements but still feel tired, foggy, or "off," it may be worth reevaluating, ideally starting with a test rather than a guess
If you're targeting a specific injury (tendon, muscle, joint), inject as close to it as you can
Do You Have Low Levels of B12