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Classification by Origin Classification by Generation These classifications matter because they determine compatibility with other ingredients, stability in formulations, and optimal use cases
To help you make a better decision, consider the following factors: Your Health Condition : If you have a medical condition that affects B-12 absorption (e.g., pernicious anemia), injections are usually more effective
From the digestive system: frequency not established nausea, vomiting, diarrhea, abdominal pain
Prescription medicines require evaluation and a valid prescription from a licensed clinician
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