how do you feel after a vitamin b12 injection will i Best B12 Shots in Chicago & Naperville 2026 Feeling worse after B12 Injection:

As long as you take the B12 via shot form or injection form it should not have an effect on any other medications you may be taking

Lebovitz HE

According to USDA Agricultural Research Service data based on NHANES, approximately 6% of adults aged 60 and older in the United States are vitamin B12 deficient, defined as plasma B12 below 148 pmol/L (2009)

Consult a healthcare provider before supplementing if you: Take blood thinners (vitamin D affects clotting) Use metformin, or proton pump inhibitors (both affect B12 absorption) Have kidney disease (impairs vitamin D metabolism) Have a history of kidney stones (excess vitamin D increases risk) Are being treated for any chronic condition Testing first ensures you get the right dose