Untreated Vitamin B12 Deficiency: 5 Early Signs to Watch Out For.

Vitamin B12 deficiency can lead to irreversible damage to the body, including memory loss, ataxia, stomach cancer, vision loss, and birth defects. Fatigue, pale skin, unexplained headaches, stomach issues, and low mood are some of the early signs of vitamin B12 deficiency. Timely diagnosis and treatment can prevent these health risks.