The venereal disease research laboratory test (VDRL) is a blood test that can identify syphilis infections. Syphilis is one of the most common sexually transmitted infections (STIs). The Centers for ...

The Schilling test was a medical procedure used to determine whether you were absorbing vitamin B12 properly. Due to recent advances in laboratory techniques, the Schilling test is not currently used.

A urine sodium test checks the amount of sodium in a sample of your pee to see whether it’s at a normal level. Having too much or too little sodium can mean there’s an issue with your kidneys or ...