Endothelial Erosion: How Trans Fats Compromise Arterial Health

Overview

The vascular endothelium—a monolayer of specialised squamous cells lining the luminal surface of the cardiovascular architecture—serves as the primary gatekeeper of arterial homeostasis. Operating as a dynamic endocrine and paracrine organ, it regulates vasomotor tone, leukocyte trafficking, and thrombogenesis. However, the ingestion of industrial trans-fatty acids (TFAs), predominantly derived from partially hydrogenated vegetable oils, instigates a progressive pathophysiological cascade known as endothelial erosion. Unlike classical plaque rupture, endothelial erosion is characterised by the denudation of the endothelial lining in the absence of a large necrotic core, exposing the thrombogenic subendothelial extracellular matrix and precipitating acute vascular events. Epidemiological data corroborated by the UK Biobank and landmark investigations published in The Lancet demonstrate a robust, dose-dependent correlation between dietary TFA consumption and accelerated cardiovascular morbidity, challenging the traditional paradigm that attributes atherogenesis solely to hypercholesterolaemia.

At the cellular and molecular level, trans fats perturb the biophysical properties of the endothelial plasma membrane. Because TFAs possess a linear trans-conformation, distinct from the cis-configuration of physiological unsaturated fats, their incorporation into phospholipid bilayers alters membrane fluidity, trans-membrane signalling, and receptor function. This structural aberration impairs endothelial nitric oxide synthase (eNOS) activation, diminishing the bioavailability of nitric oxide (NO)—the quintessential vasoprotective, anti-atherogenic molecule. Concurrently, TFAs trigger a profound pro-inflammatory and oxidative state within the vascular wall. As documented in peer-reviewed literature indexed on PubMed, exposure to trans fats upregulates nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B) pathways, driving the transcription of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), and E-selectin. This molecular signalling promotes monocyte recruitment, adhesion, and trans-endothelial migration, culminating in chronic sub-endothelial inflammation.

Furthermore, industrial trans fats exacerbate systemic lipotoxicity by adversely skewing the circulating lipoprotein profile. TFAs elevate low-density lipoprotein cholesterol (LDL-C) while concomitantly suppressing high-density lipoprotein cholesterol (HDL-C), impairing reverse cholesterol transport and augmenting the propensity of LDL particles to undergo destructive oxidation (oxLDL). These oxLDL moieties interact directly with scavenger receptors on macrophages, accelerating foam cell formation within the tunica intima. Simultaneously, the sustained oxidative stress—driven by an overproduction of reactive oxygen species (ROS) via NADPH oxidase activation—induces endothelial apoptosis and anoikis, a form of programmed cell death triggered by detachment from the extracellular matrix. At INNERSTANDIN, our critical appraisal of this mechanistic toxicology reveals that endothelial erosion is not a passive consequence of aging, but an active, chemically driven degradation of vascular integrity engineered by the systemic integration of xenobiotic dietary fats into human biology. Understanding this pathway is vital for shifting modern nutritional science away from simplistic caloric models toward a rigorous, mechanistic appreciation of molecular cytotoxicity in cardiovascular disease.

The Biology — How It Works

At the cellular level, the ingestion of industrial trans-fatty acids (TFAs)—primarily produced via the partial hydrogenation of vegetable oils—initiates a cascade of cytotoxic events that structurally and functionally dismantle the vascular endothelium. Under physiological conditions, a healthy monolayer of endothelial cells acts as a dynamic, semi-permeable barrier regulating vascular tone, leukocyte trafficking, and haemostasis largely through the constitutive synthesis of nitric oxide (NO) via endothelial nitric oxide synthase (eNOS). However, when dietary TFAs become integrated into circulating lipoproteins and the local cellular architecture, this homeostatic equilibrium is severely compromised.

Biophysically, TFAs possess a linear molecular geometry, differing distinctly from the cis-configuration of natural unsaturated fats. When incorporated into the phospholipid bilayer of endothelial cell membranes, these rigid, unnatural structures significantly diminish membrane fluidity and alter micro-domain organization, such as lipid rafts. This biophysical perturbation impairs the mechanotransduction pathways necessary for eNOS activation, leading to a profound downregulation in bioavailable nitric oxide. Consequently, endothelium-dependent vasodilation is blunted, predisposing the micro- and macro-vasculature to persistent vasospasm and elevated systemic vascular resistance.

Concurrently, intracellular processing of TFAs triggers endoplasmic reticulum (ER) stress and upregulates the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B) inflammatory axis. As documented in foundational mechanistic studies published in journals such as The Lancet and peer-reviewed literature indexed on PubMed, exposure to industrial trans fats stimulates the excessive secretion of pro-inflammatory cytokines, including tumour necrosis factor-alpha (TNF-$\alpha$), interleukin-1 beta (IL-1$\beta$), and interleukin-6 (IL-6). This sustained inflammatory microenvironment drives the aberrant expression of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), and E-selectin on the luminal surface of the endothelium. These adhesion molecules facilitate the tethering, rolling, and transmigration of circulating monocytes into the sub-endothelial space, a critical initiating step in atherogenesis.

Furthermore, TFAs exert a potent pro-apoptotic influence on endothelial cells through the generation of reactive oxygen species (ROS) and mitochondrial dysfunction. Uncoupling of eNOS transforms the enzyme from a protective NO producer into a superoxide-generating machine, exacerbating oxidative stress within the vascular wall. This oxidative milieu oxidises low-density lipoproteins (oxLDL) locally, which are subsequently engulfed by infiltrating macrophages, transforming them into lipid-laden foam cells.

Here at INNERSTANDIN, our critical appraisal of the toxicological data reveals that unlike saturated fats, which may modulate lipid profiles with varying degrees of systemic impact, industrial trans fats actively sabotage the intrinsic cellular machinery of the vascular wall. The cumulative consequence of this TFA-induced cellular dysfunction is progressive endothelial erosion—the denudation of the protective endothelial lining. This exposes the highly thrombogenic sub-endothelial extracellular matrix to circulating platelets, precipitating micro-thrombi formation and accelerating the natural history of cardiovascular disease across the UK population.

Mechanisms at the Cellular Level

At the microvascular interface, the consumption of industrially produced trans-fatty acids (iTFAs)—such as elaidic acid—initiates a complex, multi-tiered disruption of endothelial homeostasis. The single-cell-thick vascular endothelium is not merely a passive barrier, but a dynamic endocrine organ responsible for maintaining vasomotor tone, regulating local coagulation, and modulating systemic inflammatory responses. When dietary iTFAs are incorporated into the phospholipid bilayer of endothelial cell membranes, they alter membrane fluidity, biophysical properties, and transmembrane signaling cascades. This aberrant lipid integration impairs the functional capacity of endothelial nitric oxide synthase (eNOS), precipitating a precipitous decline in bioavailability of the vasoprotective molecule nitric oxide (NO) and triggering uncoupling of the enzyme, which subsequently generates vasotoxic superoxide radicals rather than physiological vasodilatory signals.

Concurrently, cellular profiling demonstrates that iTFAs upregulate nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B) pathways, driving the transcription of pro-inflammatory cytokines, including interleukin-1 beta (IL-1$\beta$), interleukin-6 (IL-6), and tumour necrosis factor-alpha (TNF-$\alpha$). This transcriptional shift provokes the luminal expression of critical adhesion molecules—namely intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin. In alignment with findings documented across vascular biology literature indexed in PubMed, these molecules capture circulating monocytes, facilitating their transmigration into the subendothelial space where they differentiate into macrophages and engulf oxidized low-density lipoproteins to become foam cells. Furthermore, trans fats induce endoplasmic reticulum (ER) stress and subsequent unfolded protein response (UPR) activation, culminating in programmed cell death (apoptosis) and anoikis of endothelial cells.

This localized cellular attrition breaches the structural integrity of the tight junctions—claudins, occludins, and junctional adhesion molecules—that secure inter-endothelial continuity. As endothelial denudation progresses, the subendothelial extracellular matrix is exposed to the flowing blood, transforming the antithrombotic surface into a pro-thrombotic milieu characterized by platelet aggregation and fibrin deposition. Public health analyses, including data sets monitored by UK health agencies, consistently correlate high-iTFA dietary patterns with this accelerated vascular senescence and localized erosion. By compromising the intrinsic regenerative capacity of endothelial progenitor cells (EPCs) mobilized from the bone marrow, trans fats effectively arrest vascular repair mechanisms. At INNERSTANDIN, our synthesis of current molecular pathology indicates that this convergence of oxidative stress, sustained inflammation, and structural delamination underpins the initiation and rapid progression of atherosclerotic cardiovascular disease, independent of traditional circulating lipid parameters alone.

Environmental Threats and Biological Disruptors

At the core of modern cardiovascular pathology lies the insidious interaction between xenobiotic industrial fats and the delicate single-cell lining of our vascular tree: the endothelium. Within the analytical framework of INNERSTANDIN, we must examine how trans-fatty acids (TFAs)—primarily manufactured via the partial hydrogenation of vegetable oils—act as potent biological disruptors. When integrated into human biology, these non-natural lipid configurations provoke profound structural alterations in cell membranes, initiating a cascade of events that culminates in endothelial erosion and the destabilisation of vascular homeostasis.

From a mechanistic perspective, dietary TFAs substitute for natural cis-unsaturated and saturated fatty acids within the phospholipid bilayer of endothelial cells. Because of their linear, rigid molecular conformation, industrial trans fats pack tightly within cellular membranes, significantly diminishing membrane fluidity and elasticity. As demonstrated in landmark biochemical assays cited in The Lancet and various PubMed-indexed vascular journals, this rigidity impairs the mechanotransduction pathways of endothelial cells. Consequently, nitric oxide (eNOS) production is severely downregulated. Without adequate bioavailable nitric oxide, the endothelium loses its baseline vasodilatory tone and its critical anti-atherogenic signalling capacity.

Furthermore, the environmental burden of circulating industrial trans fats triggers a state of chronic, low-grade vascular inflammation. TFAs upregulate nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B), a master transcriptional regulator of the inflammatory response. This activation drives the overexpression of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), and E-selectin on the luminal surface of the endothelium. These adhesion molecules act as molecular grappling hooks, capturing circulating monocytes and T-lymphocytes, which subsequently transmigrate into the sub-endothelial space and transform into foam cells.

Compounding this inflammatory surge, industrial trans fats induce severe endoplasmic reticulum (ER) stress and generate overwhelming levels of intracellular reactive oxygen species (ROS). This oxidative stress overwhelms the endogenous antioxidant defences of the endothelium, specifically superoxide dismutase and glutathione peroxidase. The resulting redox imbalance accelerates apoptotic pathways within the endothelial monolayer. As endothelial cells undergo programmed cell death or detach due to structural compromise, areas of the basal lamina are stripped bare—a pathological phenomenon clinically defined as endothelial erosion. Unlike classical rupture-prone vulnerable plaques characterized by thick necrotic cores, eroded endothelia expose thrombogenic extracellular matrix proteins directly to the flowing blood, triggering acute platelet adhesion, local thrombus formation, and sudden ischemic events without necessarily requiring antecedent high-grade stenosis.

Within the United Kingdom, where historic dietary reliance on processed margarines and deep-frying fats has left a distinct epidemiological footprint, public health data correlates high serum TFA concentrations with accelerated arterial stiffening and elevated cardiovascular morbidity. Although the UK Food Standards Agency and subsequent legislation have restricted industrial TFAs in manufactured foodstuffs, residual dietary exposure and the metabolic legacy of long-term tissue accumulation continue to challenge vascular integrity. At INNERSTANDIN, our interrogation of the literature reveals that the cellular toll of industrial trans fats extends far beyond mere lipid profile elevation; it represents a fundamental disruption of membrane biophysics, redox signalling, and structural cellular survival that directly compromises the arterial wall.

The Cascade: From Exposure to Disease

When industrial ruminant-derived or partially hydrogenated vegetable oils enter the systemic circulation, they initiate a precise, multi-stage pathological sequence culminating in structural vascular failure. The initial phase of this pathophysiological cascade begins with the incorporation of trans-isomers—specifically elaidic acid—into circulating low-density lipoprotein (LDL) particles and endothelial cell plasma membranes. As demonstrated in seminal investigations published in The Lancet and indexed across PubMed repositories, the geometric rigidity of trans-double bonds disrupts the native fluidity of the endothelial lipid bilayer. This structural aberration impairs transmembrane signaling pathways and compromises the mechanotransduction machinery of endothelial cells, rendering them hyper-susceptible to hemodynamic shear stress.

At the molecular level, intracellular accumulation of trans fats triggers chronic, low-grade endoplasmic reticulum (ER) stress within the vascular endothelium. This activates the unfolded protein response (UPR) and subsequently upregulates nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B), the master transcriptional regulator of inflammation. Concurrently, endothelial nitric oxide synthase (eNOS) uncoupling occurs, driven by local peroxynitrite generation and diminished bioavailability of tetrahydrobiopterin ($BH_4$). The resulting deficit in vasoprotective nitric oxide ($NO$) abolishes endothelium-dependent vasodilation, while the overexpression of pro-inflammatory cytokines such as tumor necrosis factor-alpha (TNF-$\alpha$) and interleukin-1 beta (IL-$1\beta$) drives the surface translocation of vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1).

As adhesion molecule expression surges, circulating monocytes tether, roll, and transmigrate into the sub-endothelial space, a process fundamentally accelerated by trans fat-induced endothelial activation. Within the intima, these monocytes differentiate into macrophages, which avidly scavenge oxidized LDL particles—the formation of which is drastically exacerbated by the circulating oxidative burden imposed by industrial lipids. This unchecked uptake gives rise to lipid-engorged foam cells, establishing the foundational fatty streak.

Crucially, unlike standard atherosclerotic progression driven predominantly by sub-endothelial lipid accumulation, trans fat exposure uniquely targets the structural integrity of the endothelial monolayer itself. Apoptosis and programmed detachment (anoikis) of endothelial cells outpace local regenerative capacity, leading to focal denudation of the basement membrane. This phenomenon—endothelial erosion—exposes highly thrombogenic sub-endothelial extracellular matrix proteins, including von Willebrand factor and fibrillar collagens, directly to flowing blood.

In alignment with epidemiological data from the UK Biobank tracking cardiovascular morbidity associated with industrial fat intake, this denudation creates a pro-thrombotic milieu. Platelet adhesion, activation, and aggregation occur spontaneously upon the exposed matrix, precipitating acute luminal thrombosis without necessarily requiring prior plaque rupture. Thus, the biological cascade initiated by trans fat ingestion transcends simple lipid deposition; it systematically dismantles the vasoprotective barrier, orchestrates localized chronic inflammation, and culminates in irreversible endothelial erosion and catastrophic vascular events. At INNERSTANDIN, we emphasize that mapping these exact molecular pathways is essential for redefining dietary policy and clinical interventions against ischemic heart disease.

What the Mainstream Narrative Omits

For decades, institutional dietary guidelines promulgated by bodies such as the UK’s Scientific Advisory Committee on Nutrition (SACN) have operated on a reductionist paradigm, framing cardiovascular risk almost exclusively through the narrow lens of circulating low-density lipoprotein cholesterol (LDL-C) and saturated fat consumption. While public health messaging successfully targeted industrially produced partially hydrogenated oils for their role in raising LDL-C and depressing high-density lipoprotein cholesterol (HDL-C), the mainstream narrative fundamentally omits a far more insidious pathophysiological mechanism: the direct, non-lipid-mediated structural sabotage of the vascular endothelium by trans-fatty acids (TFAs). By evaluating cardiovascular pathology solely through a lipid-centric prism, mainstream epidemiology obscures how TFAs physically integrate into endothelial cell membranes, altering biophysical properties and instigating localized inflammatory cascades long before systemic dyslipidaemia manifests.

At the molecular level, peer-reviewed literature indexed in PubMed reveals that dietary elaidic acid—the primary trans isomer found in industrial oils—readily incorporates into the phospholipid bilayers of human endothelial cells. This aberrant incorporation alters membrane fluidity, disrupts lipid raft architecture, and impairs the mechanotransduction pathways of endothelial nitric oxide synthase (eNOS). Consequently, production of the vasoprotective signalling molecule nitric oxide is critically blunted. Furthermore, as documented in landmark vascular biology investigations published in The Lancet and specialized circulation journals, TFAs act as potent agonists of systemic inflammation. They upregulate nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B) pathways, driving the overexpression of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), and E-selectin. This molecular signature facilitates monocyte adhesion and sub-endothelial migration—the foundational steps of atherogenesis that occur independently of circulating cholesterol metrics.

Compounding this oversight is the mainstream narrative's persistent failure to contextualise the unique vulnerability of the UK population, where ultra-processed foods rich in cheap industrial fats remain deeply entrenched in socio-economically deprived demographics. Standard lipid panels routinely fail to capture the cellular toxicity wrought by trans fats because they measure quantitative lipid mass rather than qualitative vascular damage. At INNERSTANDIN, our synthesis of contemporary molecular pathology demands a paradigm shift: we must move beyond outdated lipid hypotheses and recognize endothelial erosion as a direct cytotoxic consequence of xenobiotic fat ingestion. True cardiovascular prevention requires looking past mere biomarker management and addressing the structural degradation of the arterial wall at the cellular interface.

The UK Context

Within the United Kingdom, the epidemiological footprint of industrial trans-fatty acids (iTFAs) on cardiovascular pathology remains a critical public health metric, despite legislative interventions designed to mitigate population-level exposure. Mechanistically, when exogenous iTFAs—predominantly elaidic acid derived from partially hydrogenated vegetable oils—are incorporated into the phospholipid bilayers of human endothelial cells, they induce profound biophysical perturbations. As documented in landmark analyses published in The Lancet and various PubMed-indexed vascular biology compendiums, these trans-isomers decrease membrane fluidity and disrupt lipid raft architecture. This structural deformation impairs endothelial nitric oxide synthase (eNOS) phosphorylation, attenuating the bioavailability of vascular nitric oxide and precipitating endothelial dysfunction, the initiating step in atherogenesis.

From a regulatory standpoint, the UK’s Committee on Toxicity (COT) and the Scientific Advisory Committee on Nutrition (SACN) have long established that saturated and trans-fatty acid consumption directly correlates with elevated low-density lipoprotein cholesterol (LDL-C) and suppressed high-density lipoprotein cholesterol (HDL-C). However, the molecular reality extends far beyond standard lipid panels. At the cellular level, UK-based biochemical research highlights how iTFAs upregulate vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) via nuclear factor kappa B (NF-$\kappa$B) signalling pathways. This creates a pro-inflammatory milieu that recruits circulating monocytes, driving them to transmigrate into the sub-endothelial space where they oxidise and transform into foam cells.

Here at INNERSTANDIN, we must emphasise that while Food Standards Agency (FSA) guidelines and voluntary reformulation by the British food manufacturing sector have successfully curtailed dietary iTFA intake from historic highs, socio-economic disparities in dietary patterns across the UK continue to sustain pockets of high exposure. Ultra-processed foods (UPFs), which dominate significant portions of the British dietary landscape, frequently harbour residual industrial fats and oxidised lipid degradation products. When chronically ingested, these compounds subvert physiological vascular homeostasis, accelerating sub-clinical arterial stiffening and predisposing the British populace to ischaemic heart disease through unyielding, low-grade endothelial erosion.

Protective Measures and Recovery Protocols

Mitigating the vasotoxic cascades induced by industrially produced trans-fatty acids (iTFAs) requires a multi-pronged biochemical intervention aimed at halting membrane incorporation, suppressing chronic vascular inflammation, and upregulating endogenous repair mechanisms. As demonstrated in landmark investigations published in The Lancet and indexed across PubMed, systemic recovery from endothelial erosion is contingent upon absolute dietary elimination of partially hydrogenated oils (PHOs). Given the UK Committee on Medical Aspects of Food Policy (COMA) and subsequent Scientific Advisory Committee on Nutrition (SACN) recommendations, dietary intake of iTFAs must remain below 2% of total daily energy intake, though optimal vascular homeostasis demands literal zero-tolerance.

At the cellular level, primary recovery protocols focus on membrane phospholipid remodelling. Because iTFAs structurally mimic saturated fatty acids while retaining a non-natural trans-double bond, they integrate into the endothelial plasma membrane, impairing fluidity and downregulating endothelial nitric oxide synthase (eNOS) phosphorylation. To outcompete residual trans-isomers, targeted nutritional interventions utilise high-dose marine-derived omega-3 polyunsaturated fatty acids—specifically eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Clinical pharmacokinetic data indicate that supraphysiological EPA/DHA administration competitively inhibits the desaturase and elongase enzymes responsible for trans-fat metabolism, whilst simultaneously displacing iTFAs from lipid rafts. This restores membrane biophysics, normalises mechanotransduction, and reactivates caveolae-mediated nitric oxide production.

Simultaneously, countering the severe oxidative stress and inflammasome activation (specifically NLRP3 upregulation) triggered by iTFA-induced lysosomal destabilisation necessitates potent antioxidant buffering. Upregulation of the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway is critical for restoring endogenous glutathione homeostasis and scavenging intravascular reactive oxygen species (ROS). Clinical trials highlight the efficacy of high-potency polyphenol supplementation—such as epigallocatechin gallate (EGCG) from green tea and anthocyanins—in suppressing vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) expression, thereby arresting leukocyte arrest and sub-endothelial migration.

Crucially, true arterial restitution relies on endothelial progenitor cell (EPC) mobilisation and homing to denuded basement membrane sites. Elevated circulating iTFA concentrations inhibit bone marrow-derived EPC release and impair functional migration capacity via vascular endothelial growth factor (VEGF) receptor downregulation. Protocol optimisation via targeted micronutrient repletion—including optimal vitamin D3 status and magnesium repletion—facilitates stromal cell-derived factor-1 (SDF-1) gradient re-establishment. This biochemical signalling is vital for directing EPCs to sites of erosion, accelerating re-endothelialisation, and preventing the progression from early structural compromise to advanced atherosclerotic plaque development. Through this rigorous, mechanism-driven framework, INNERSTANDIN empowers clinicians and researchers to reverse the insidious vasotoxic footprint of industrial lipids.

Summary: Key Takeaways

Industrial trans-fatty acids (TFAs) exert profound vasotoxic effects, fundamentally destabilising vascular homeostasis and accelerating atherogenesis through distinct molecular pathways. As established in landmark epidemiological and mechanistic studies published in The Lancet and peer-reviewed PubMed literature, xenobiotic TFAs integrate into endothelial cell membranes, drastically altering biophysical properties such as fluidity and transmembrane receptor signalling. This structural incorporation triggers sustained oxidative stress via the upregulation of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and the concomitant downregulation of endothelial nitric oxide synthase (eNOS), culminating in a precipitous depletion of vascular nitric oxide bioavailability.

Concurrently, TFAs provoke chronic, low-grade vascular inflammation by upregulating nuclear factor kappa-light-chain-enhancer of activated B cells (NF-$\kappa$B) pathways, which subsequently drive the endothelial expression of vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1). Within the context of the UK population—where historical consumption of partially hydrogenated oils has left a distinct legacy of cardiovascular morbidity—these interrelated mechanisms precipitate profound endothelial erosion. The denudation of the protective glycocalyx and the detachment of endothelial monolayers expose the underlying thrombogenic subendothelial matrix. At INNERSTANDIN, our synthesis of contemporary molecular pathology confirms that industrial TFAs do not merely dyslipidify plasma lipoproteins; they act as primary cellular disruptors that dismantle arterial integrity at the microscopic level, cementing their status as potent vascular toxins.