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The best way to test the amount of B12 in your body is to have your blood analyzed by InsideTracker, which will tell you if youre at your optimal nutritional range

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However, it is contraindicated for those with certain health conditions and is far less effective for individuals with methylation impairments

If you experience common side effects like abdominal cramping or loose stools, talk to your doctor

The following signs may point to your B12 level being low , and a simple diagnostic test can confirm whether the cause of these symptoms is indeed a Vitamin B12 deficiency: Odd sensations such as numbness or tingling around your arms, legs, and hands