Fatigue and weakness
Fatigue is one of the most common but often overlooked symptoms of vitamin B12 deficiency. Many people attribute their tiredness to stress, lack of sleep, or a busy lifestyle. However, vitamin B12 is essential for the production of red blood cells, which carry oxygen around the body. A deficiency can lead to anemia, which reduces the supply of oxygen to tissues and organs, causing feelings of tiredness and weakness. If you often feel tired despite getting enough rest, it may be worth considering your vitamin B12 levels.

Nerve problems

Vitamin B12 is essential for maintaining a healthy nervous system. A deficiency can damage nerves, causing tingling, numbness, or a “pins and needles” feeling in the hands and feet. These symptoms, which are often dismissed as fatigue or overexertion, can indicate significant nerve damage if left untreated. Some individuals may experience difficulty walking or balance problems, which can be attributed to loss of coordination associated with nerve function.

Cognitive impairment

Many individuals ignore the cognitive effects of vitamin B12 deficiency. Symptoms may include memory loss, difficulty concentrating, and mood changes such as depression or irritability. These signs can easily be mistaken for aging or stress. However, research suggests that long-term vitamin B12 deficiency can lead to irreversible neurological damage, including an increased risk of dementia. If you notice changes in your cognitive abilities or mood, it is important to discuss this with your healthcare provider.