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Understanding whether your previous medication caused fatigue helps you anticipate whether switching will improve or worsen this symptom

Other foods that are high in vitamin B12 include: 3 ounces cooked clams without shells: 17 mcg 3 ounces wild cooked oysters: 15 mcg 1/4 cup fortified nutritional yeast: 8 to 24 mcg 3 ounces Atlantic salmon or canned tuna: 2.5 mcg 1 cup 2% milk: 1.3 mcg What Is The Fastest Way To Fix B12 Deficiency

Insert the needle under your skin at the injection site (abdomen, thigh, or upper arm)

You can expect to feel a quick, slight pinch at the injection site, but the sensation is over in just a few seconds

If your deficit is mild, you may respond quickly to medication and eating more foods containing B12