Vitamin B5 deficiency can result in headaches, fatigue, irritability, poor sleep, nausea, stomach cramps, numbness, and muscle cramps
Once you start getting injections and your levels normalize, that crushing fatigue often lifts significantly within days to weeks
[2] However, elevated MMA is not conclusive, as it is seen in people with B 12 deficiency, but also in elderly people who have renal insufficiency, [28] and elevated homocysteine is not conclusive, as it is also seen in people with folate deficiency
These injections, sometimes called a B12 shot, are administered intramuscularly, ensuring immediate absorption and utilization by the body