Organic Acid Test in California

The Organic Acid Test measures organic acids in the blood. These are byproducts of metabolism. It is ordered to check for rare metabolic disorders or to investigate unexplained symptoms.

What it measures

Methylmalonic acid — A marker for vitamin B12 deficiency.
Homovanillic acid — A breakdown product of dopamine, a brain chemical.
Vanillylmandelic acid — A breakdown product of adrenaline and noradrenaline.
Orotic acid — A marker for certain urea cycle disorders.
Pyroglutamic acid — Can indicate a metabolic imbalance.

Who it is for

It is typically ordered by metabolic specialists, neurologists, or pediatricians when a metabolic disorder is suspected.

Preparation

No special preparation is usually needed. Fasting may be required if other tests are done at the same time.

Results and what they mean

Results are reported as levels of each organic acid, often with a reference range. A clinician interprets them in the context of your health. This is general information, not medical advice.

Requesting the Organic Acid 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. Because the region is uneven, coastal metros, inland towns, and rural counties with very different access to testing — worth planning around when you book.

Frequently asked questions

Is this test painful?

It uses a blood sample, so you may feel a brief pinch.

How long do results take?

Typically 1-3 business days.

Can I eat before the test?

Usually yes, unless your clinician instructs otherwise.

Are results kept private?

Yes, your results are confidential and shared only with your care team.

Organic Acid Test by city in California

All testing in California → Full Organic Acid Test guide →