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Use only pharmaceutical-grade sources
Cognitive function: Some research links GH to brain health and cognitive maintenance

Additionally making sure your health issues are caused by b12 and not folate is also an important distinction to make

[DOI] [PubMed] [Google Scholar] 81.Bab I, Gazit D, Chorev M, Muhlrad A, Shteyer A, Greenberg Z, et al
