b12 injection intramuscular or intravenous Best Vitamin Sites Cyanocobalamin (b12) Injection 2,000 mcg/mL

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Sublingual formulations, which dissolve under the tongue, are often marketed as superior to standard tablets, but most of the dissolved vitamin is actually swallowed with saliva and absorbed through the digestive tract similarly to regular oral supplements

Remove the needle and apply pressure to the area using gauze, a cotton ball, or a bandage

This clinician-guided option is designed for men who need additional metabolic support beyond diet and exercise alone

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The B12 injection vitamin is injected directly into the muscle, which allows for better absorption compared to oral supplements