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Wellness 22 May 2026 6 min read Why do I feel worse after my B12 injection

Illnesses Any illness or condition that affects the digestive system can result in a B12 deficiency because the vitamin is bound to the protein molecules in your food and is released and absorbed by the body during digestion

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Evaluation: Through our lab testing and screenings, we can check your serum B12 level to see whether your current regimen is working and confirm whether a deficiency is present

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Conditions such as intestinal or stomach problems, poor nutrition, HIV, pregnancy, old age, veganism and alcoholism can contribute to vitamin B12 deficiency