Vitamin B12 is an important nutrient that helps your body make red blood cells and DNA, the genetic material in all of your cells. It’s essential to how your body functions. Without treatment, vitamin B12 …

Jan 14, 2023 · When left untreated, a B12 deficiency can lead to problems with your heart, nerves, or brain. B12 shots, supplements, and changing what you eat can help. But first, the doctor has to find …

Jul 21, 2025 · Vitamin B12 deficiency is rarely about one single cause. Most cases stem from poor intestinal absorption—most notably autoimmune pernicious anemia—followed by prolonged use of …

At elevated levels, homocysteine is linked to dementia, heart disease, stroke, and osteoporosis. Vitamin B12 is associated with improved psychological health as well. “It can aid in reducing...

Pernicious anaemia is the most common cause of vitamin B12 deficiency in the UK. Pernicious anaemia is an autoimmune condition that affects your stomach. An autoimmune condition means your …

Dec 9, 2025 · Vitamin B12 deficiency can cause symptoms of anemia, nerve problems, and sensory changes that often resemble other conditions, making diagnosis difficult. Most cases are due to low …

The lists below are by no means exhaustive, but offer clinically supported causes and risk factors for vitamin B12 deficiencies. Please click on those in bold to see documented and peer reviewed …

Jan 7, 2026 · Restoring Healthy Levels Treatment for a low B12 level is determined by the underlying cause of the deficiency. For individuals whose deficiency is purely diet-related, high-dose oral …

Mar 24, 2023 · Vitamin B 12 deficiency can develop for the following reasons: Absence of intrinsic factor, also called pernicious anemia — Intrinsic factor is a protein secreted by cells of the stomach lining. …

Apr 7, 2025 · One of the most common causes of vitamin B12 deficiency is pernicious anemia, a condition where a person’s immune system mistakenly reduces their ability to absorb the vitamin.