National Diet and Nutrition Survey: Headline Results from Years 1, 2 and 3 (combined) of the Rolling Programme 2008/09 2010/11 (Report)
[7] Commonly observed adverse effects include transient injection-site discomfort, breast tenderness, nausea, fluid retention, and mild mood fluctuation, whereas rarer but serious events encompass venous or arterial thromboembolism, gallbladder disease, significant elevation of blood pressure, and hormone-sensitive malignancies such as endometrial or breast cancer
The infusion can help increase oxygen delivery to muscles, improve endurance, and speed up recovery time
The chart below lists what to watch for and when to adjust
The Role of Blood Tests in Your B12 Journey The most reliable way to track your progress is with simple blood tests