Researchers handling the solution directly should confirm no personal sensitivity to benzyl alcohol prior to repeated exposure
If you order your B12 shots elsewhere, make sure they come from a certified lab that follows stringent pharmacy regulations
The mechanism of action isnt well understood, but its believed it doesnt affect the tendon tissue cells directly, but rather that either works by activating other repair cells that can help tendons or ligaments or making the human growth factor receptor on the repair cells more sensitive (3)
The time it takes for B12 to work will depend on the form, how you take it, the dosage, and your current B12 status
Keep in mind that everyone is different and has unique needs
If nausea is a concern, evening injection allows you to sleep through the initial wave