A high or low BUN result can reflect kidney function, hydration, protein intake, liver function, medications, or recent illness. Learn how to interpret BUN with creatinine, eGFR, symptoms, and follow-up testing.
An eGFR result estimates how well your kidneys filter blood. Learn what high, normal, and low eGFR values can mean, when repeat testing matters, and what to discuss with your clinician.
High creatinine may point to reduced kidney filtration, dehydration, medication effects, or muscle-related factors. Low creatinine often reflects lower muscle mass or pregnancy. Learn how to interpret creatinine with eGFR, urine testing, trends, and symptoms.
High bilirubin can point to different issues depending on whether direct or indirect bilirubin is elevated. Low bilirubin is usually not concerning. Learn how to interpret patterns, symptoms, limitations, and next steps.
A high GGT result often points to liver or bile duct irritation, but it does not identify the cause by itself. A low GGT result is usually not clinically concerning. Learn how to interpret GGT with ALP, ALT, AST, bilirubin, alcohol use, medications, symptoms, and follow-up testing.
A high or low alkaline phosphatase result can point toward liver, bile duct, bone, nutrition, thyroid, pregnancy, growth, or medication-related causes. Learn how ALP is interpreted with other labs and what to ask next.
ALT is a liver enzyme often reported on a comprehensive metabolic panel or liver panel. Learn what high and low ALT results can mean, what commonly affects ALT, when to follow up, and what to ask about next.
A high or low parathyroid hormone result is interpreted together with calcium, vitamin D, kidney function, phosphorus, and magnesium—not by the PTH number alone.
A high or low calcium blood result can point to parathyroid, vitamin D, kidney, medication, or albumin-related issues. Learn how to interpret total calcium, corrected calcium, ionized calcium, symptoms, follow-up tests, and next steps.
A high or low zinc blood test can reflect nutrition, inflammation, supplements, sample contamination, or a medical condition that affects absorption or loss. Learn how to interpret zinc results, when to repeat testing, and what to ask next.
