Selenium Urine Test in California

The Selenium Urine Test measures the amount of selenium excreted in your urine. Selenium is a trace mineral obtained from foods like Brazil nuts, seafood, and grains. This test is ordered to assess selenium status and help identify a deficiency or excessive intake.

What it measures

Selenium — The primary mineral measured; reflects recent dietary intake and body stores.
Creatinine — Often measured at the same time to adjust selenium levels for urine concentration.
Urine Volume — Total volume collected over a set period, used to calculate total selenium excretion.
Specific Gravity — Indicates how dilute or concentrated the urine is, which can affect selenium results.

Who it is for

A clinician may order this test if you have symptoms of selenium deficiency or toxicity, or if you have a condition that affects nutrient absorption. It is also used to monitor selenium levels in people receiving nutritional support.

Preparation

No fasting is required. You may be asked to collect a 24-hour urine sample, so follow the instructions provided by your lab carefully.

Results and what they mean

Results are reported as the amount of selenium in your urine, often as micrograms per liter or micrograms per 24 hours. Your clinician will interpret the results alongside your diet, symptoms, and other tests. This is general information, not medical advice; only a qualified healthcare provider can diagnose or treat any condition.

Requesting the Selenium Urine Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

Frequently asked questions

Do I need to change my diet before the test?

Usually no. But tell your clinician about any selenium supplements or Brazil nuts you eat, as these can affect results.

How is the urine sample collected?

Most often, you collect all urine over 24 hours in a special container. Your lab will give you detailed instructions.

What do high or low results mean?

High levels may suggest excessive intake; low levels may suggest deficiency. Your clinician will consider your overall health to interpret them.

Is this test covered by insurance?

Coverage varies by plan and reason for testing. Check with your insurance provider before the test.

Selenium Urine Test by city in California

All testing in California → Full Selenium Urine Test guide →