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Most research suggests that B12 supplementation is only beneficial for mental health when there is a true deficiency

Sterile water lacks this preservative and is typically intended for single-use applications only

Common Causes of B12 Deficiency Several factors contribute to vitamin B12 deficiency: Recognizing Deficiency Symptoms Vitamin B12 deficiency manifests through various symptoms that can significantly impact quality of life: These symptoms often develop slowly, leading many individuals to attribute them to aging or stress rather than nutritional deficiency

10.1080/16078454.2021.2010877 41 OuzzaniM.HammadyH.FedorowiczZ.ElmagarmidA