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This study reinforced the concept that massive doses of B12whether delivered via injection, nasal drop, or highly concentrated sublingual liquidare required to force the vitamin across the blood-brain barrier via passive diffusion to relieve localized central nervous system deficiencies

Despite many online success stories claiming it heals bones, joints, and stomach ulcers, there is no solid scientific evidence to back this up

10.1016/j.jbiomech.2014.01.023 53 DeyoR

A smaller group describes transient increases

Evaluation and Treatment of Adult Growth Hormone Deficiency: An Endocrine Society Clinical Practice Guideline

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