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Vitamin B12 injections are generally very safe, even at higher doses, because B12 is a water-soluble vitamin

The main tests for checking B12 levels include: Serum Vitamin B12 Test: Measures how much B12 is in your blood, but high levels dont always mean theres a problem

The majority of back pain cases stem from disc issues, facet joint problems, ligament damage, or a combination of factors

See what a study showed in the Recovery section of our Protein Review, which includes our Top Picks among protein powders and drinks

The most recent comprehensive synthesis is a July 2025 systematic review in the HSS Journal , the musculoskeletal journal of the Hospital for Special Surgery in New York, led by Nikhil Vasireddi at Case Western Reserve University School of Medicine