b12 injection results Shots High Vitamin B12 Levels: Causes,

Stress, fatigue and brain fog as well as reduced physical stamina are common side effects of Vitamin B12 deficiency

Possible laboratory investigations which can be performed include serum B12 [i.e., 4,000 patients with B12 deficiency treated with sublingual or IM B12 (but without detailing dosages and schedules of administration included in the study) and showed that the mean difference in serum B12 levels before and after treatment was significantly higher in the sublingual than IM group (Bensky et al., 2019)

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Older Adults (Over 50) As people age, the stomach produces less hydrochloric acid, which is needed to release B12 from food proteins