Dr. Dayan Goodenowe on the BetterHealthGuy Podcast: Lipid Biology, Plasmalogens, & Neurodegenerative Prodromes

Dr. Dayan Goodenowe recently joined Scott on the BetterHealthGuy Podcast for a wide-ranging, two-part conversation on lipid biology, plasmalogen science, and the biochemical patterns that precede neurodegeneration. Episode 230, the first of two parts, dives deep into the foundational role that membrane lipids play in cellular function, resilience, and systemic health.

This was a substantive conversation. If you’re interested in understanding why lipids matter, not just that they matter, this episode is well worth your time.

What’s Covered in Part 1

The discussion begins with a first-principles look at how the body builds and maintains its cellular membranes. Dr. Goodenowe walks through the phospholipid bilayer, the biological wall that gives every cell in the body its structure, and explains how the composition of that membrane varies not only between different cell types, but even within different regions of the same cell. The membranes surrounding your mitochondria, for example, look very different from the outer membrane of the cell itself.

From there, the conversation moves on to what happens when that membrane composition is disrupted by oxidative stress, nutritional gaps, or environmental burdens. When polyunsaturated lipids and plasmalogens in the membrane are damaged, the cell becomes less flexible, less functional, and more likely to trigger an immune response. Dr. Goodenowe explains this process in clear, accessible terms, drawing on analogies that make the science easy to follow.

Other key topics include:

• How mitochondrial function connects to membrane integrity and the Cell Danger Response
• The nutrient and cofactor requirements that keep mitochondria running, and what happens when they’re missing
• The functional differences between omega-9 and omega-3 plasmalogen precursors (PlasmalogenN9 and PlasmalogenN3), and how they support different aspects of cellular health
• How plasmalogens function as the body’s primary membrane-level antioxidant, and why that mechanism is so different from other antioxidants
• The role of peroxisomes in endogenous plasmalogen production, and how fasting and resistance training support peroxisomal function
• Why plasmalogen precursors, rather than intact plasmalogens from food, are the effective route to restoring plasmalogen levels in cells and in the brain
• The seed oil debate, viewed through the lens of lipid biology
• Phosphatidylcholine, its importance for cellular health, and why animal-derived sources matter for the brain
• Epigenetics as a reflection of function, not a driver of it, and what that reframe means for how we think about health optimization