Although a Statistics Canada population survey published in 2013 found, on average, seniors had only slightly lower levels of B12 than younger adults
(2010) Effect of physiological doses of oral vitamin B12 on plasma homocysteine: a randomized, placebo-controlled, double-blind trial in India
Individuals who have had gastrointestinal surgery, such as weight loss surgery, may also have fewer cells through which to secrete stomach acid and intrinsic factor, inhibiting B12 absorption
First, it works through beta-3 adrenergic receptors, which are predominantly expressed in adipose tissue with limited expression in most other tissues
With B12 shots as part of your IV vitamin therapy, it can help fight fatigue, weight loss, boosts metabolism and impact energy levels, etc
The oral administration of B12 (in pill form) carries significant drawbacks: Vitamin B12 is absorbed in the terminal ileum