Though the link isnt well understood, scientists have linked the vitamin to serotonin and depression in people with a deficiency
Jensen RBB, Chellakooty M, Vielwerth S, Vaag A, Larsen T, Greisen G, Skakkebk NE, Scheike T, Juul A
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The cost difference between formulations with and without glycine is typically negligible
Bone Fractures In 2019, a study found an association between high intakes of vitamins B6 and B12 from food and supplements with the risk of hip fracture among postmenopausal women in the Harvard Nurses Health Study
One very important point: injectable B12 is primarily a medical treatment for a diagnosed deficiency