Pills Energy blood on vitamin D vitamin B magnesium and a handful of other things once or twice a year You can do this at various panies such as httpbloedwaardentestnl but you can also go to your doctor if you experience plaints Although I received enough vitamin B I had a vitamin B deficiency My value was pmol L Officially this is not a shortage but I believe that this value is far from ideal for optimum health and optimum energy levels The cause of my vitamin B deficiency was that my body had an increased vitamin B need I slept less than hours a day exercised three times a Pills Energy and had chronic stress through -hour working weeks - all factors that caused my body to consume more vitamin B In addition I drank a lot of coffee which meant I needed more B Now after taking months of supplements micrograms per day or times as much as the remended daily amount my vitamin B is at a value that I am happy with pmol L I feel more energetic and can do much more in a day I can also m