Sources of B12 include:
- Foods of animal origin : Beef liver, clams, tuna, chicken, eggs, yogurt.
- Fortified foods : Breakfast cereals, bread, nutritional yeast.
- Supplements : multivitamins, B complex, or stand-alone vitamin B12 tablets
Avoid extreme diets for extended periods, as they can lead to nutrient deficiencies, including B12.

When to see a doctor
If you notice persistent changes in your nails or other symptoms such as fatigue, numbness, or memory problems, consult a healthcare professional. Early detection and treatment of vitamin B12 deficiency can prevent long-term complications.
Legal notice: This content is provided for informational purposes only and is not a substitute for medical advice. Consult your doctor about your health and medical conditions.
