Palmitic acid optimal range and reference range
Compiled by Alina Radu, founder of Sera, from the published sources below · Last reviewed November 9, 2026
Sera's bands for Palmitic acid:
- Optimal 20 – 30 %; sufficient 15 – 35 %; out of range below 15 or above 35 %.
Evidence grade: Published reference interval. A band that primarily reflects a published adult laboratory or population reference interval. It is not necessarily applicable to every assay or laboratory.
All units
| Unit | Optimal | Sufficient | Out of range |
|---|---|---|---|
| % | 20 – 30 | 15 – 35 | below 15 or above 35 |
What the evidence says
No published reference interval or clinical threshold exists for red cell palmitic acid in percent; the bands are Sera's own. Cohort averages measured by one method across seven countries were 20.9% to 24.0%, so a result a little below 20% is ordinary. The outer edges of 15% and 35% have no source. Largely produced by de novo lipogenesis from excess carbohydrate rather than eaten, so the membrane level tracks metabolic state more closely than saturated fat intake — which is why cutting dietary saturated fat may not move it. In the Framingham Offspring cohort palmitic acid did not predict death, while palmitoleic acid, the lipogenesis marker made from it, did. Percentages depend on which fatty acids the panel counts, so compare only within one laboratory.
Assay: Results differ meaningfully between platforms and methods. Compare against the interval printed by the issuing laboratory before acting on a borderline value.
Sources
- Red Blood Cell Fatty Acid Patterns from 7 countries: Focus on the Omega-3 Index — Schuchardt JP, Cerrato M, Ceseri M, et al. — Prostaglandins, Leukotrienes and Essential Fatty Acids, 2022 · Peer-reviewed publicationMean red cell levels measured by one laboratory method in 17 cohorts (Italy, Spain, Germany, Canada, United States, Japan, Korea; 167,347 people). Cohort means only: the paper gives no percentiles or reference interval. Palmitic acid (C16:0) means: 20.9% to 22.2% in the ten US cohorts, 21.9% to 24.0% elsewhere (Canada 23.5%). All lie inside the optimal band of 20 to 30%; no edge is supported.
- Using an erythrocyte fatty acid fingerprint to predict risk of all-cause mortality: the Framingham Offspring Cohort — McBurney MI, Tintle NL, Vasan RS, et al. — The American Journal of Clinical Nutrition, 2021 · Peer-reviewed publicationFramingham Offspring, 2,240 adults, 27 red cell fatty acids as percent of total. Only myristic, palmitoleic, behenic acid and the Omega-3 Index predicted all-cause death; palmitic acid did not, though it correlated (0.62) with palmitoleic acid. Supports the statement that there is no outcome-linked threshold.
What Palmitic Acid (C16:0, RBC) measures
The most abundant saturated fatty acid in the body and in most diets, measured as a share of membrane fatty acids.
Largely made by the body rather than eaten: de novo lipogenesis produces palmitic acid from excess carbohydrate, so a high membrane level tracks metabolic state more closely than it tracks saturated fat intake. That is what makes it worth measuring.