Journal of Dietary Supplements , 22 (5) 664679
It is therefore worth knowing the signs and symptoms, as early diagnosis and treatment are vital
If improvement plateaus or symptoms persist despite treatment, further investigation may be warranted to identify other contributing factors or alternative diagnoses
B12 plays a key role in synthesizing neurotransmitters such as serotonin and dopamine, which help regulate mood and reduce stress
Edited by Professor Boris Zhivotovsky Supplementary information Rights and permissions Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made