Leyla Weighs In: The Hidden Impact of B12 Deficiency on Aging

Vitamin B12 Deficiency--The “Aging” Symptoms You Shouldn’t Ignore: Leyla Muedin, a registered dietitian nutritionist in New York City, discusses vitamin B12 deficiency as a common problem that can mimic normal aging, noting adults need only about two micrograms daily to support red blood cells, nerves, and DNA. She reviews the history of liver treatment for pernicious anemia and explains that deficiency remains common in older adults, vegans/vegetarians, and people with impaired absorption due to low stomach acid, autoimmune gastritis, weight loss surgery, or medications such as metformin and proton pump inhibitors. Symptoms can develop slowly and include fatigue, weakness, shortness of breath, numbness/tingling, poor balance, memory issues, and brain fog; she advises medical evaluation and B12 testing rather than assuming aging or relying on wellness-clinic injections when levels are normal. She emphasizes B12 is primarily in animal foods, so vegans need supplements, and notes broader nutrient shortfalls she sees in vegan clients.