bac water tower - 296 Ton Cooling 985 Ton, BAC #3985C, Stainless
Description
500 mcg 7.5 units and 2,000 mcg = 30 units on a U-100 syringe

doi: 10.1038/s41433-022-02162-8

Another reason for getting tired and staying that way is a lack of specific nutrients like vitamin B12

Any ideas or experiance with this
