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Publisher WADA Accessed Jun 27, 2026 Study type Regulatory Document Limitations: The prohibited list is an anti-doping document, not a consumer medical-safety guide

International Journal of Molecular Sciences, 22 (12), 6403

Patients requiring higher doses or more frequent injections may incur higher costs

Experts caution against unsupervised intake of Vitamin D, B12, magnesium, and biotin supplements, highlighting potential harm despite their popularity, noting that even though too much B12 is mostly safe, but may trigger acne or react with some medicines, medical supervision is still important

A medical review helps separate realistic expectations from marketing noise by considering injury history, medications, training load, sourcing quality, and whether this option fits the broader care plan

Complete, consistent darkness whenever the vial is in storage