[header] How to avoid b12 deficiency [title] Eat the recommended daily value of vitamin b12. [step] Daily values are assessed according to the approximate daily recommended amount of a specific nutrient for a healthy adult. For vitamin b12, the daily value is 6.0 mcg. 
If you consume meat daily, you're likely already consuming this amount; however, absorption of vitamin b12 can be complicated by several factors. In any event, monitor your diet to ensure you're getting enough vitamin b12.