Food Cravings and Vitamin Deficiencies

5. Vitamin B12

Unlike vitamin D, the body cannot create vitamin B12 on its own, but the nutrient is essential for nerve and metabolism health. Those with vitamin B12 deficiencies might crave chocolate. After you've indulged a bit (dark chocolate has a lot of health benefits, after all), you may need to increase your intake of organ meats and other animal products, which are some of the only natural sources of vitamin B12. If you do not eat animal products, some plant-based foods such as soy alternatives and nutritional yeast are fortified with the nutrient.