I have took vit d and b12 test because I feel tired, back pain l, low energy, bone popping and cracking sound whenever I move, sit or stand up. I feel stomach problem like poor digestion, lack of hunger, need to go to the washroom 3 to 4 time each day for freshnup. My stomach is not getting clean in the morning all because of these problems I am under weight and feels weak. My vitamin d level is 68.86 which is under insufficient level and I have increased level of phosphorus which is 5.70 (should be between 2.6 - 4.5)