Users should track any unwanted reactions including fatigue , headache , or other side effects
Here are some good food sources of vitamin B12: Advertisement | page continues below 3 ounces of cooked clams, without shells: 17 mcg 3 ounces of cooked oysters: 14.9 mcg 1/4 cup of fortified nutritional yeast: 8.3 to 24 micrograms, depending on the brand 3 ounces of cooked Atlantic salmon: 2.6 mcg 3 ounces of cooked ground beef, 85% lean: 2.4 mcg 8 ounces of 2% milk: 1.3 mcg 6 ounces of plain, fat-free yogurt: 1.0 mcg 1 serving of fortified breakfast cereal: 0.6 mcg 1 1/2 ounces of cheddar cheese: 0.5 mcg 1 large cooked egg: 0.5 mcg (A 3-ounce serving of meat or fish is about the size of a deck of cards.) Do you need a vitamin B12 supplement during pregnancy
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Seek immediate medical attention for signs of a severe allergic reaction including hives, swelling of the face, lips, tongue, or throat, difficulty breathing, or chest tightness
They also have strict rules on how to make the medications, from what equipment they use to how people are trained to how to react when something goes wrong