It helps keep the bodys nerve and blood cells healthy and helps make DNA, the genetic material in all cells
Last reviewed: May 30, 2026 Last updated: May 30, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
Unnecessary vitamin B12 shots costing Ontario millions, study finds Most seniors getting B12 shots in province don't need them, researchers say Almost two-thirds of Ontario seniors who received vitamin B12 shots had no evidence of a B12 deficiency, according to a study published in the medical journal JAMA Internal Medicine
Many patients may report an increase in energy and a decrease in fatigue after starting B-complex injections, usually within days to a couple of weeks of regular treatment
Spending money on high-dose B12 pills for this purpose is unlikely to be beneficial and should not replace evidence-based weight management approaches
Additionally, if you're taking vitamin B12, some medicines can interfere with your ability to digest it, including: Aminosalicylic acid (Paser), used to treat digestive problems Colchicine (Colcrys, Mitigare, Gloperba) is an anti-inflammatory medicine used to prevent and treat gout Proton pump inhibitors (Prilosec, Prevacid) are used to reduce stomach acid Metformin (Glumetza, Fortamet, others), used to treat diabetes Vitamin C supplements QUESTION See Answer What are the warning signs of vitamin B12 deficiency