Do you need to fast before a cholesterol test? Many routine panels can be taken after eating, but your clinician may ask for a fasting test in specific situations.
Yes, a full bladder can affect a blood pressure reading. Here is how to prepare, repeat a high reading and decide what to do next.
Can biotin make thyroid test results look abnormal? Learn which readings may change, how to check your supplement dose, and what to ask before a repeat test.
Could fruit juice on your fingertips cause a false high blood sugar reading? Learn what the research shows and how to check an unexpected meter result.
When should you check blood sugar after eating? Learn whether to measure at one or two hours, when the clock starts, and how to interpret your result.
Iron deficiency and A1C can complicate a blood sugar result. Learn when anemia may make A1C look high, which iron and glucose tests can help, and what to ask your clinician.
Leukocytes in urine with negative nitrites can be confusing. Learn why this result neither confirms nor rules out a UTI, what symptoms matter, and which follow-up tests may help.
A blood in urine test can raise questions even when your urine looks normal. Learn why a dipstick needs confirmation, what microscopic hematuria can mean, and when to seek care.
A cystatin C test can help clarify kidney function when creatinine-based eGFR is uncertain. Learn when it helps, what the combined estimate shows and why urine tests still matter.
Creatinine alone cannot show every aspect of kidney health. Learn how three kidney tests—eGFR, uACR and urinalysis—work together to give a fuller picture.