Nearly every other page on this site describes plasmalogens going down: down with age, down in Alzheimer’s cohorts, down in kidney failure, down in sepsis. Pregnancy research is where that pattern breaks. In placentas from preeclamptic pregnancies, and in the third trimester plasma of women who go on to develop preeclampsia, plasmalogen measures come in higher than in uncomplicated pregnancies. That inversion is the most useful thing on this page, because it disposes of the idea that more plasmalogen is simply better. Nothing here is medical advice, and nobody who is pregnant should start any supplement without their obstetric team.
Key Takeaways
- In placentas from 20 preeclamptic and 20 normotensive pregnancies, total plasmalogen-derived dimethyl acetal was elevated by 18% in preeclampsia, p equal to 0.026, with the 16:0 species specifically higher, p equal to 0.018[1].
- In a cohort of women with obesity sampled every trimester, standard lipid panels showed few differences, but targeted lipidomics found plasmalogen, phosphatidylethanolamine and free fatty acid species elevated in the third trimester of women with preeclampsia[2].
- Four plasmenyl-phosphatidylethanolamines measured at 24 to 28 weeks were associated with increased risk of spontaneous preterm birth, and the association was carried by the saturated species[3].
- In gestational diabetes the direction flips back again: of 33 postpartum lipid species associated with the condition, the inverse associations were primarily cholesterol esters and phosphatidylcholine plasmalogens[4].
- So plasmalogens are not a one-directional health marker. They run low in some disease states and high in others, and the same lipid class points opposite ways in two complications of the same pregnancy.
- No trial has given a plasmalogen supplement during pregnancy. There is no safety data in this population.
The Placenta Result, Which Came First
A 2017 study characterised plasmalogen-derived dimethyl acetal fatty acid derivatives in placentas from 20 normotensive and 20 preeclamptic pregnancies, sampled at two sites, near the cord insertion and at the periphery, and quantified by gas chromatography mass spectrometry with flame ionisation detection. Total dimethyl acetal was elevated by 18% in the preeclamptic placentas against normotensive controls, p equal to 0.026. The 16:0 species accounted for more than 55% of the dimethyl acetal fatty acids measured, and it was significantly higher in preeclampsia, p equal to 0.018. Placental polyunsaturated fatty acids were elevated too[1].
Dimethyl acetal is the same readout used as a plasmalogen proxy in the kidney and sepsis literature, where it runs low. Here it runs high. The measurement technique is not the variable, the tissue and the disease are.
The Maternal Plasma Result, and Why Standard Panels Missed It
A 2023 study followed a cohort of women with obesity across pregnancy, collecting blood at each trimester and running both targeted lipidomics and standard clinical lipid panels. The framing matters: obesity roughly triples the risk of preeclampsia, yet only about 10% of women with obesity develop it, so the question was what separates the 10% from the rest. Standard lipid panels and clinical measurements revealed few differences at all. Targeted lipidomics identified plasmalogen, phosphatidylethanolamine and free fatty acid species that were elevated in the third trimester of women with preeclampsia. Race and trimester were both considerable sources of variation in the plasma lipidome of these women[2].
Two things follow. First, a routine lipid panel is not measuring this, so no reader can infer anything about it from an ordinary blood test. Second, the signal appeared in the third trimester, which is late enough that its value as an early warning is unproven.
Preterm Birth
A 2021 study collected maternal plasma at 24 to 28 weeks gestation and profiled the lipidome by high-performance liquid chromatography tandem mass spectrometry, analysing metabolites individually, as whole lipid classes, and grouped by degree of saturation. After false discovery adjustment at q below 0.15, four plasmenyl-phosphatidylethanolamines and three free fatty acids were associated with increased risk for spontaneous preterm birth. The association was held specifically by the saturated plasmenyl-phosphatidylethanolamines[3].
A 2025 placental study of early spontaneous preterm birth, before 32 weeks, found long-chain polyunsaturated fatty acids, acylcarnitines, acylglycerols, plasmalogens and lysophospholipids all remarkably different between preterm and term placentas. The alterations were much more profound in placentas from Black than from White mothers, and neither mode of delivery nor body mass index accounted for the difference. The disrupted pathways also differed by fetal sex, particularly between Black male and Black female placentas, and the overall pattern was consistent with placental inflammation[5]. A 2023 study of pregnancies complicated by obesity similarly found fetal sex differences in placental ether and plasmalogen phosphatidylethanolamine and phosphatidylcholine content[6].
Those race and sex differences are worth stating plainly because they mean a single population-average number would misdescribe most individual pregnancies.
Gestational Diabetes Points The Other Way
A 2023 prospective cohort enrolled 1,409 women 24 to 72 hours after delivery of a singleton baby and followed them for a median of 11.8 years, during which 219 developed type 2 diabetes. Thirty-three postpartum lipid species were associated with gestational diabetes. Sixteen of those associations were inverse, and they were primarily cholesterol esters and phosphatidylcholine plasmalogens. Seventeen were positive, primarily diacylglycerols and triacylglycerols. Four of the 33 were associated with incident type 2 diabetes and mediated roughly 12% of the progression from gestational diabetes to type 2 diabetes[4].
So within pregnancy research, plasmalogens run high in preeclampsia and preterm birth and low in gestational diabetes. Anyone holding a mental model where plasmalogen is a single dial with a good end and a bad end has to give it up here. Our article on what plasmalogens do in membranes explains why that is unsurprising: these lipids are structural and context-dependent, and the same class can be consumed, mobilised or accumulated depending on what the tissue is doing.
What This Means If You Are Pregnant
It means the research is at the biomarker stage and nothing in it is actionable. No trial has given a plasmalogen supplement to a pregnant woman, so there is no dose, no duration, no safety data and no outcome. Pregnancy is also the single setting where supplement caution should be highest, because exposures reach the fetus and because preeclampsia and preterm birth are managed clinically with approaches that have actually been tested.
The practical instruction is short: take supplement questions during pregnancy to your obstetric provider, and do not infer a plasmalogen recommendation from a measurement study. Our general safety page covers what is and is not known about tolerability in adults, and our evidence-tier page shows how little of this literature has reached human trials. Readers researching supplements for non-pregnancy reasons can see current options in the authorized seller guide.
Frequently Asked Questions
Are plasmalogens high or low in preeclampsia?
High. A 2017 study of 20 preeclamptic and 20 normotensive placentas found total plasmalogen-derived dimethyl acetal elevated by 18% in preeclampsia, with the 16:0 species specifically higher. A 2023 study of women with obesity found plasmalogen species elevated in third-trimester plasma of those who developed preeclampsia. This is the opposite direction to kidney disease and sepsis.
Do plasmalogens predict preterm birth?
Four plasmenyl-phosphatidylethanolamines measured in maternal plasma at 24 to 28 weeks were associated with increased risk of spontaneous preterm birth after false discovery adjustment, and the saturated species carried the association. A separate placental study found the alterations were much more profound in Black than White mothers, so a single population average would misdescribe most pregnancies.
Why do plasmalogens go up in some conditions and down in others?
Because they are structural membrane lipids whose level reflects what a tissue is doing, not a single measure of health. Within pregnancy alone they run high in preeclampsia and preterm birth and low in gestational diabetes, where phosphatidylcholine plasmalogens were among the inverse associations in a study of 1,409 women.
Is it safe to take a plasmalogen supplement while pregnant?
This is not known, because no trial has given a plasmalogen supplement to a pregnant woman. There is no dose, duration, safety data or outcome for this population. Supplement questions during pregnancy should go to an obstetric provider.
References
- Bernabe BP, Tussing-Humphreys L, et al. Placental dimethyl acetal fatty acid derivatives are elevated in preeclampsia. Placenta (2017). PMID 28292473
- Kasimanickam RK, Kasimanickam VR, et al. Lipidomics Reveals Elevated Plasmalogens in Women with Obesity Who Develop Preeclampsia. Journal of clinical medicine (2023). PMID 37109308
- Aung MT, Ashrap P, Watkins DJ, et al. Maternal lipidomic signatures in relation to spontaneous preterm birth and large-for-gestational age neonates. Scientific reports (2021). PMID 33854141
- Wang Y, Zhu Y, Tsai MC, et al. Gestational Diabetes Mellitus, Postpartum Lipidomic Signatures, and Subsequent Risk of Type 2 Diabetes: A Lipidome-Wide Association Study. Diabetes care (2023). PMID 37043831
- Yang Y, Wang Y, Lyu Y, et al. Race and sex differences in placental lipid metabolism are associated with spontaneous early preterm birth†. Biology of reproduction (2025). PMID 40244074
- Powell TL, Uhlson C, Madi L, et al. Fetal sex differences in placental LCPUFA ether and plasmalogen phosphatidylethanolamine and phosphatidylcholine contents in pregnancies complicated by obesity. Biology of sex differences (2023). PMID 37770949
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
