Boosts Immune Function The immune system often weakens with age, leaving the body more vulnerable to infections and diseases
A qualified healthcare professional should always prescribe and monitor the treatment
For background and my updated recommendations, see my extended look at vitamin B12 in the related posts below
18 Prevention Because of potential interactions from prolonged medication use, physicians should consider screening patients for vitamin B 12 deficiency if they have been taking proton pump inhibitors or H 2 blockers for more than 12 months, or metformin for more than four months
(1) M Heffernan, R J Summers, A Thorburn, E Ogru, et al (2001)
Visual clarity does not indicate sterility