Truth About Vitamin B12 Deficiency When it comes to vitamin B12 deficiency you need to look for these signs: Forgetfulness Dizziness Muscle weakness Paraesthesia Pale skin Unexplainable fatigue Eye problems You can take a supplement or you could get what you need by eating the right foods. All of the foods listed below are good sources of vitamin B12. If you’re not eating them already you should consider it and of course, if these foods are not for you there are plenty of supplements available as I mentioned above. Liver Sardines Salmon Milk Soy products Tofu Fortified cereals Low-fat dairy Crab