Affiliate disclosure

We earn a commission when you buy a test through links on this site. We currently earn it through CJ Affiliate, an affiliate network.

Who sells the tests

The tests and prices shown on this site are currently sold by HealthLabs. When you click a buy button or a price row and then buy, HealthLabs pays us a commission through the network.

What it costs you

We don’t add anything to the price. You pay the seller’s price at checkout, and the current price is always on the seller’s site. The prices we show were last checked in October 2026.

How the links work

Buy links on this site go to an address on our own site that forwards you to the seller through the affiliate network. They are marked as sponsored links. The network and the seller may use cookies to record that you came from us, so the commission can be credited. See the privacy page.

What the commission does not change

• It does not change what we recommend. We point to the smallest, lowest-priced test that fits your question, even when a larger test would pay more.
• It does not change what we say about a test. We say plainly what a test can’t tell you.
• It does not change our sources or how we present reference ranges. See how we review.

Availability

Not available in ND, RI, NY, NJ, MD and HI. We show this near each buy button.

Where we disclose

You will find a short disclosure at the top of pages with buy links, near each price, and in the footer of every page. If the seller changes, we update this page.