While it is likely safe for most healthy teenagers, their internal production is usually at its lifetime peak
For instance, a study has reported that modulation of the microbiota using antibiotics can regulate innate immunity by altering the population of NK cells in tumour model mice [216]
Another category of gut-busters is antibiotics
Hampton DW, Serio A, Pryce G, Al-Izki S, Franklin RJ, Giovannoni G, et al
So, the tests you will be asked to get done are- a complete blood count to check if you have any type of anaemia, reticulocyte count to see how many new blood cells are being made in the body, serum bilirubin levels which tell how many cells are being lost as bilirubin is a byproduct of blood cell breakdown and checking amounts of homocysteine and methylmalonic acid higher values of which confirm B12 deficiency