b12 injection site subcutaneous Choosing the Right Needle and Syringe for Injections: A Complete Guide File:Subcutaneous-injection-sites-274x300.png - Wikimedia Commons

In rare cases, starting high-dose B12 treatments for severe anemia may cause temporary imbalances in potassium levels or an acne-like rash

Rather than starting at 500mcg, consider beginning at 200-250mcg for the first week

Cyanocobalamin is more commonly found in oral supplements and fortified foods, and while it is effective for many people, some practitioners prefer hydroxocobalamin for injections due to its natural form and longer retention

Store in a cool, dark, and dry place, preferably in the refrigerator, and keep it away from sunlight to maintain quality and integrity.

In combination with exercise, running distances increase by approximately 150%