The Lipid Digest

A scientist's reading of the latest lipid biology

Brain, metabolism, nutrition, and the molecular evidence behind the headlines.

🧠 Brain & Neurodegeneration

Alzheimer's, Parkinson's, MS, myelin, APOE4, endocannabinoids, ketones, DHA, and the lipid biology of the aging brain.

Brain Lipid Metabolism · Nature Cell Biology

How the Brain Manages Its Lipids, Cell by Cell

Every cell type in the brain runs a distinct lipid economy. A landmark review maps astrocytes, neurons, microglia, and oligodendrocytes — with immediate implications for neurodegeneration.

DHA · Membrane Biology · APOE4

DHA Is Structural Brain Biology

Up to 40% of synaptic membrane fatty acids are DHA. It is not a supplement — it is the structural lipid that makes rapid, reliable synaptic transmission physically possible.

Lipid Genetics · APOE4 · TREM2 · GBA

The Lipid Genetics of Neurodegeneration

APOE4, TREM2, GBA — the genes carrying highest risk for Alzheimer's and Parkinson's disproportionately encode lipid enzymes and transporters. Lipid dysregulation is upstream.

APOE4 · Alzheimer's & Atherosclerosis

APOE4: The Gene That Connects Alzheimer's and Atherosclerosis

One gene. Two organs. One lipid biology. APOE4 drives neurodegeneration and vascular disease simultaneously through impaired cholesterol transport and defective membrane lipid delivery.

Parkinson's · Lysosomes · GBA1 · LRRK2

The Lysosome Is Failing. That's Why Neurons Are Dying.

GBA1, LRRK2, GRN, C9orf72 — every major genetic risk for Parkinson's and FTD converges on the same organelle. Lysosomal lipid trafficking failure is the mechanism, not the consequence.

Parkinson's · Sphingolipid Biomarkers

The Sphingolipid Biomarkers Rewriting Parkinson's Disease

BMP in urine tracks LRRK2 kinase activity. GluSph in plasma tracks GBA1 dysfunction. The first lipid-based precision biomarker framework for Parkinson's stratification.

Diagnostics · p-Tau217 · JAMA 2025

The Blood Test for Alzheimer's Is Here

Plasma p-tau217 detects Alzheimer's pathology with AUC 0.93–0.96 from a standard blood draw — 10–15 years before symptoms. Mass spectrometry made it possible.

Liver–Brain Axis · DHA · Personal

The Liver–Brain Axis: DHA and Alzheimer's

The DHA in your brain didn't swim there from your last salmon dinner. Your liver made it — and when that process breaks down, your brain feels it decades later.

💊 GLP-1 & Metabolic Disease

How GLP-1 receptor agonists rewrite lipid biology across adipose, liver, brain, and heart — and their emerging role in dementia prevention.

GLP-1 · VLDL · Ceramides · NLRP3

GLP-1 Drugs Are Rewiring Lipid Biology

Not weight loss drugs — systemic lipid metabolism reprogrammers. They remodel adipose, suppress hepatic VLDL export, activate astrocyte fatty acid oxidation, and inhibit NLRP3.

MASLD · Ceramides · DAGs · Lipid Trafficking

Fatty Liver Is a Lipid Trafficking Disease

MASLD affects 38% of adults globally. The danger is not triglyceride storage — it is the ceramides and DAGs that build up when lipid traffic exceeds capacity.

🫀 Cardiovascular Lipids

Beyond LDL — ceramides, Lp(a), oxidized phospholipids, the omega-3 index, vascular dementia, and RNA therapeutics transforming cardiovascular risk.

Cardiovascular Disease · Lipid Biomarkers

Beyond Cholesterol: The Evolving Lipid Biomarkers of CVD

Half of all heart attacks occur in people with normal LDL. The field is moving toward ceramides, Lp(a), oxidized phospholipids, and spatial lipidomics of plaques.

Lp(a) · OxPL · RNA Therapeutics

Lipoprotein(a): The Most Dangerous Lipid Particle

Lp(a) affects 1.4 billion people. Genetically determined, immovable by statins, 5–6× more atherogenic per mole than LDL. RNA therapies achieving 80–98% reduction are in Phase 3.

Omega-3 Index · UK Biobank

The Omega-3 Index: The Most Underused Lipid Biomarker

A high omega-6/omega-3 ratio predicts 26% higher all-cause mortality and 31% higher CVD mortality in 85,000 UK Biobank participants. Most clinicians have never ordered it.

Heart–Brain Axis · Vascular Dementia

Your Heart and Your Brain Are the Same Patient

Hypertension, diabetes, dyslipidemia, atherosclerosis — the conditions your cardiologist treats also destroy the tiny vessels feeding your brain, often a decade before the first memory symptom.

⚗️ Lipids & Cancer

Ferroptosis, tumor lipid addiction, immune synapse remodeling, CAR-T engineering, and the lipid logic of cancer metabolism and immunotherapy.

Ferroptosis · FSP1 · Nature 2025

Lipids That Kill Cancer: The FSP1 Ferroptosis Story

Three interlocking papers: FSP1 is essential in living tumors, guards lipid droplet neutral lipids from peroxidation, and is controlled by vitamin B2.

Cancer Metabolism · ACSL4 · FASN

Cancer Cells Are Addicted to Lipids

ACSL4 drives metastasis via PUFA membrane remodeling. FASN builds membranes for proliferation. FSP1 shields cells from ferroptotic death. The full lipid addiction of cancer, mapped.

🔬 Lipid Cell Biology

Membrane ecosystems, lipid droplets, GPCRs, gut–brain axis, SPMs, and the molecular machinery of lipid-driven signaling.

Organelle Lipidomics · Cardiolipin · BMP · Phosphoinositides

Every Organelle Has Its Own Lipid Identity

From van Meer and de Kroon's lipid map to modern organelle lipidomics — cardiolipin, BMP, phosphoinositides, and lipid rafts as functional readouts of cellular health.

GPCR · Membrane Lipids · Drug Targets

34% of All Drugs Target GPCRs. Lipids Are Running the Show.

Molecular dynamics simulations reveal membrane lipids entering GPCR binding pockets, stabilizing hidden allosteric sites, creating lateral gateways invisible to crystallography.

Membrane Biology · Protein–Lipid

The Hidden Lipid Ecosystems Around Proteins

Membrane proteins do not float in a uniform lipid sea. They are surrounded by selective, dynamic lipid ecosystems that determine their assembly, conformation, and function.

Aging · Plasmalogens · Centenarians

The Lipid Clock of Aging

Ceramides rise. Plasmalogens fall. Ether phospholipids mark exceptional longevity in centenarians. Large-scale lipidomics is building the first molecular clock of biological aging.

Exposome · Metabolomics · Nutrition

Your Genome Is Fixed. Your Exposome Is Not.

Food rewrites your molecular biology three times a day. The exposome is the totality of what your biology has been exposed to — and its record is written in your metabolome.

🧬 Emerging Technologies

Lipid nanoparticles, spatial lipidomics, mass spectrometry, AI multi-omics — the tools rewriting what is measurable, druggable, and deliverable.

AI · Multi-Omics · Neurodegeneration

AI-Driven Multi-Omics in Neurodegeneration

Single-cell genomics, fluid multi-omics, spatial transcriptomics, and spatial lipidomics — integrated by deep graph neural networks — breaking the target discovery bottleneck.

LNPs · mRNA Delivery · Organ Targeting

Lipid Nanoparticles That Know Where to Go

Peptide ionizable lipids, SORT chemistry, and protein corona engineering have broken the liver monopoly on mRNA delivery — opening lung, spleen, thymus, and bone marrow.

LTMS · Mass Spectrometry · NCB 2026

LTMS: Lipid Trap Mass Spectrometry

For the first time, researchers can identify which specific lipids bind to which specific proteins inside living cells. A new tool that reframes membrane biology.

Mass Spectrometry · Explainer

How Mass Spectrometry Actually Works

A mass spectrometer can detect thousands of molecules in a single drop of blood. Here's how it works — and why it is changing medicine, diagnostics, and our understanding of biology.

Biomarkers · Patient Stratification

Why Biomarkers Matter Even Without a Cure

Clinical subtypes are biologically heterogeneous. Molecular subtypes are biologically coherent. The case for molecular-driven patient stratification.

Drug Discovery · Metabolomics

Metabolomics & Lipidomics in Modern Drug Discovery

From target identification to precision medicine — how small-molecule readouts of real-time biology are reshaping the entire drug development pipeline.

🌿 Nutrition & Longevity

The molecular science of what we eat — OEA and satiety, the omega-3 index, dietary fat policy, the Mediterranean diet, and the biology of exceptional longevity.

Mediterranean Diet · Cognitive Aging

Mediterranean Diet Delays Brain Aging by 3.5 Years

A 2025 review of 18 studies found the Mediterranean diet delays cognitive aging by up to 3.5 years. A lipid scientist explains what's actually happening at the membrane level.