Some sources suggest the compound is well-absorbed orally based on rat pharmacokinetic data, while others argue that subcutaneous injection provides more reliable absorption
This pattern suggests that oral bioavailability may vary significantly between individuals and that systemic effects require adequate absorption that not everyone achieves
[77] Non-ruminant, non-hindgut herbivores may have an enlarged forestomach and/or small intestine to provide a place for bacterial fermentation and B-vitamin production, including B 12
[1] In moderate deficiencies, feeling tired, feeling faint, mouth ulcers, rapid breathing, upset stomach, pallor, hair loss, decreased ability to think and joint pain and the beginning of neurological symptoms, including abnormal sensations such as, numbness and tingling, and tinnitus may occur
Depressive disorders are defined by the Diagnostic and Statistical Manual of Mental Disorders , fifth edition, or DSM-5, published by the American Psychiatric Association