Anything lower than these is considered low:
Adult males: 75-175 micrograms/dL
Adult females: 65-165 micrograms/dL
Children: 50-120 micrograms/dL
Newborns: 100-250 micrograms/dL.
Adult males: 75-175 micrograms/dL
Adult females: 65-165 micrograms/dL
Children: 50-120 micrograms/dL
Newborns: 100-250 micrograms/dL.