Item Value
Test name Fatty Acids, Very Long Chain , Saturated plus Phytanic acid
Available Stat? No
Turn around times 2 weeks
Performed by KNDY
Patient Preparation An 8 hour fast before specimen collection is recommended. For infants, where an 8 hour fast is not possible, it is recommended that the sample be collected just prior to a feeding. Otherwise, false positive results may occur.
Normal range
Normal X-linked ALD hemizygote X-linked ALD Heterozygote Zellweger Syndrome
C26:0 µg/mL 0.24 (0.14) 1.30 (0.45) 0.68 (0.29) 3.93 (1.50)
C26:1 µg/mL 0.11 (0.04) 0.34 (0.16) 0.23 (0.10) 4.08 (2.30)
Phytanic acid µg/mL 0.54 (0.29) 0.57 (0.46) 0.45 (0.22) 0.40 (0.28)
Pristanic acid µg/mL 0.05 (0.04) 0.06 (0.06) 0.06 (0.03) 0.09 (0.16)
C22:0 µg/mL 29.76 (6.45) 18.50 (5.10) 19.41 (4.08) 8.66 (4.97)
C24:0 µg/mL 22.88 (4.88) 32.25 (8.20) 24.89 (5.42) 17.51 (8.64)
C22:1 (n-9) µg/mL 1.61 (0.45) 1.19 (0.66) 1.33 (0.41) 1.73 (0.65)
Erucic acid
C24/C22 µg/mL 0.78 (0.10) 1.71 (0.23) 1.30 (0.19) 2.07 (0.28)
C26/C22 µg/mL 0.01 (0.003) 0.07 (0.03) 0.04 (0.02) 0.50 (0.16)
Container type Lavender top
Amount to Collect 6 mL blood
Sample type EDTA plasma

If you have additional questions regarding this test, please call: 415-353-1667