OAT Test

Question 1

• What is the primary function of an Organic Acid Test (OAT) in functional medicine?

Answer 1

• To assess functional metabolic pathways (microbial overgrowth, mitochondrial function, nutrient needs, detox/oxidative stress) via urinary metabolites.
• yeast/ fungal /bacterial / clostridia markers,
• ketone/FA metabolism
  -CA cycle
• oxalates
  mitochondrial function
• NT metabolites
  -pyrmaidine metabolism (folate)
• nutritional markers
• indicators of detoxification
• amino acid metabolites

(something about what stool test could not? )

Question 2

• Why might both pyruvate and lactate appear elevated on an OAT?

Answer 2

• Impaired pyruvate dehydrogenase activity and/or thiamine deficiency, hypoxia/mold-related hypoperfusion, anemia, or high recent exercise driving anaerobic glycolysis.

Question 3

• Which of the following statements is TRUE regarding organic acid tests (OAT)?

Answer 3

• OAT can detect yeast/mold signatures missed on stool testing and provides functional insight into nutrient cofactor needs and mitochondrial status.

Question 4

• High oxalate markers on an organic acid test can indicate:

Answer 4

• Fungal/mold overgrowth (Candida/Aspergillus),
  -B6 and/or magnesium deficiency
• fat/bile malabsorption
• low Oxalobacter abundance.

Question 5

• Candida diverts isocitrate from the citric acid cycle to form glyoxylate, which can be converted into oxalate when which nutrient is deficient?

Answer 5

• Vitamin B6.

Question 6

• Which of the following is a potential consequence of persistently high oxalate levels in the body?

Answer 6

• Mitochondrial dysfunction with fatigue, pain sensitivity (e.g., vulvodynia), kidney stone risk, and tissue irritation.

Question 7

• When comparing stool tests to organic acid tests for yeast identification:

Answer 7

• OAT is generally more sensitive for yeast/mold metabolites; stool can miss them.

Question 8

• How does acetaldehyde affect methionine synthase?

Answer 8

• It inhibits methionine synthase, impairing methylation.

Question 9

• Which of the following neurotransmitter changes can be linked to excessive acetaldehyde?

Answer 9

• Reduced dopamine/norepinephrine turnover and increased excitatory stress response; anxiety/insomnia due to impaired catecholamine metabolism.

(also think it mentioned reduced serotonin? )

Question 10

• Which nutrient may help detoxify acetaldehyde by supporting aldehyde dehydrogenase 2 (ALDH2) activity?

Answer 10

• Niacinamide (vitamin B3).

Question 11

• Which of the following is NOT one of the four known ways the body or its microbiota break down oxalates?

Answer 11

• the one that wasnt oxalate - NB oxalate oxidase came up twice
  
  • (The four are: oxalate decarboxylase, oxalate oxidase, Oxalobacter formigenes, and certain Bacillus species acting as oxalate decarboxylase with manganese.)

Question 12

• Oxalates can inhibit lactate dehydrogenase (LDH) by 55-68%. To ensure proper LDH function, which nutrient deficiency should you rule out?

Answer 12

• Thiamine (vitamin B1).

Question 13

• Which of the following bile acids has been shown to be superior when lowering oxalates?

Answer 13

• Ursodeoxycholic acid (UDCA) support for bile flow is favored clinically when oxalates are high.

Question 14

• Which of the following is a well-known urinary marker for Candida on an OAT?

Answer 14

Arabinose

Question 15

• Elevated kynurenic acid on an organic acid test may indicate a deficiency of:

Answer 15

• Vitamin B6 (PLP) and/or riboflavin (B2) within kynurenine pathway flux.

Question 16

• Pyroglutamic acid elevations may suggest increased glutathione demand. Which combination can help promote glutathione reductase activity?

Answer 16

• Riboflavin (B2) + NADPH support (e.g., vitamin C) + selenium/precursors (e.g., NAC/glycine) to recycle and rebuild glutathione.

Question 17

• What percentage of microbial infections can develop biofilms within approximately two weeks?

Answer 17

• About 80%.

Question 19

• Eating foods high in phenolic compounds can invalidate which organic acid marker?

Answer 19

• 4-hydroxybenzoic/4-hydroxyphenylacetic-related phenolic markers (e.g., HPHPA interpretation can be confounded by dietary phenols).

Question 20

• If a client has elevations in 2-hydroxyphenylacetic acid on an organic acid test, what might be the potential cause:

Answer 20

• Small intestinal bacterial overgrowth/dysbiosis involving phenylalanine-tyrosine metabolism.

Question 21

• Elevated HPHPA and 4-cresol on an organic acid test have been correlated with hyperammonemia due to Clostridia overgrowth. Which blood markers might you check to correlate ammonia burden?

Answer 21

• Plasma ammonia, BUN, and possibly AST/ALT if severe burden; also consider venous bicarbonate/CO2.

Question 22

• Which organism, when present in excess, has been associated with autism spectrum disorders?

Answer 22

• Clostridia species (e.g., C. difficile; HPHPA/4-cresol producers).

Question 23

• High 3-indoleacetic acid on an organic acid test might indicate:

Answer 23

• Excessive tryptophan putrefaction from intestinal dysbiosis/SIBO.

Question 24

• The majority of serotonin in the body is stored in:

Answer 24

• The gut (enterochromaffin cells/platelets).

Question 25

- Which symptom cluster is commonly associated with elevated epinephrine levels?

Answer 25

- Anxiety, palpitations, tremor, insomnia, and hypervigilance.

Question 26

- Low levels of GABA can present with which of the following symptom patterns?

Answer 26

- Restlessness, anxiety, poor sleep initiation, and heightened stress reactivity.

Question 27

- A low vanillylmandelic acid (VMA) level can indicate a potential deficiency in:

Answer 27

- Vitamin C and/or copper (dopamine beta-hydroxylase cofactor needs).

Question 28

- Reduced homovanillic acid (HVA) in clients may suggest a deficiency in:

Answer 28

- Tyrosine or cofactors for dopamine synthesis (iron, B6).

Question 29

- Why might elevated quinolinic acid be associated with depression?

Answer 29

- It’s an NMDA agonist/neurotoxic metabolite from the kynurenine pathway promoting excitotoxicity and neuroinflammation.

Question 30

- Why might alpha-lipoic acid (ALA) supplementation be approached cautiously in clients with suspected mercury burden but high acetaldehyde on OAT?

Answer 30

- ALA can mobilize mercury from tissues to the brain if systemic burden isn’t cleared, worsening symptoms.

Question 31

- A big pitfall when interpreting neurotransmitter markers (HVA, VMA, 5-HIAA) on OAT is failing to:

Answer 31

- Correlate with symptoms and cofactors/diet/meds; treat them as functional pathway clues, not direct CNS levels.

Question 32

- A client with high oxalates on OAT experiences vulvodynia and chronic UTIs. Which support strategy is often recommended first?

Answer 32

- Gradual reduction of dietary oxalates (stepwise taper) with B6 and magnesium support, plus bile flow support.

Question 33

- If 5-hydroxyindoleacetate (5-HIAA) is very low but kynurenine is extremely elevated, what does this suggest about tryptophan metabolism?

Answer 33

- Tryptophan is being shunted down the kynurenine pathway (inflammation/IDO activation) away from serotonin synthesis due to cofactor deficits or immune activation.