9 Warning Signs of B12 Deficiency—Plus What to Eat
1. Unexplained Fatigue and Weakness 1. Unexplained Fatigue and Weakness (image credits: unsplash) Feeling tired all the time, even after a good night’s sleep, is one of the most common red flags for vitamin B12 deficiency. According to the 2024 National Institutes of Health report, up to 15% of adults over 60 in the U.S. have low B12, and fatigue is their most frequent complaint. B12 is essential for making healthy red blood cells, which deliver oxygen throughout the body. When you don’t have enough B12, your cells starve for oxygen, making you feel sluggish and drained. A 2025 Mayo … Read more