should b12 be injected subcutaneously or intramuscularly

It is not an approved therapy, and no human trial confirms a combined benefit so far non returnable prescription Pack Size:3 bottles Vitamin B12: Symptoms, Dosage & Toxicity Risks https://cdn.prod.website-files.com/65e24ea4edb44ad565350cde/69a5d2c70f09b48e6447de57_img_alan-health-b12-mic-post-banner.webp

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