Vitamin B-12 deficiency symptoms may include: strange sensations, numbness, or tingling in the hands, legs, or feet difficulty walking (staggering, balance problems) anaemia a swollen, inflamed tongue difficulty thinking and reasoning (cognitive difficulties), or memory loss weakness fatigue While an experienced physician may notice the symptoms and be able to detect a vitamin B-12 deficiency with a good interview and physical exam, a blood test is needed to confirm the condition
Doctors could screen patients for contraindications, prescribe appropriate doses, and monitor treatment over time
However, published human pharmacokinetic data comparing oral to injectable absorption at equivalent doses has not been established in peer-reviewed literature
You would only know because your results stopped or your side effects disappeared, both signs that the active compound has broken down
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Urine tests can detect alcohol long after your last drink by measuring alcohol metabolites