#20 - Thomas Dayspring, M.D., FACP, FNLA – Part I of V: an introduction to lipidology
This episode introduces Dr. Thomas Dayspring, a renowned lipidologist and Peter's mentor. They discuss Dr. Dayspring's remarkable 67-pound weight loss through a modified intermittent fasting regimen and carbohydrate restriction, and his personal obsessions with firefighting and hockey, before delving into basic lipid definitions.
Deep Dive Analysis
13 Topic Outline
Dr. Dayspring's Personal Health Transformation
Motivation for Lifestyle Change and Fasting Regimen
Dr. Dayspring's Lifelong Passion for Firefighting
The Influence of Sister Loretta Agnes on Dr. Dayspring
Dr. Dayspring's Early Obsession with Ice Hockey
Evolution of Atherosclerotic Heart Disease Treatment
Dr. Dayspring's Self-Taught Journey into Lipidology
The Importance of Visuals in Lipid Education
Revisiting the Significance of HDL Cholesterol
Defining Lipids, Cholesterol, and Triglycerides
The Crucial Role of Phospholipids in Biology
Primary Purpose of Lipoproteins Beyond Cholesterol Delivery
Impact of Fatty Acid Makeup on Cell Membrane Function
6 Key Concepts
Lipid
A lipid is a molecule that is not soluble in water, but may be soluble in organic solvents. Examples include oils, fats (fatty acids and glycerides), and cholesterol, which serve various purposes like energy storage or structural components in the body.
Triglyceride (Triacylglycerol)
Triglycerides are a type of glyceride formed when three fatty acids attach to a three-carbon sugar called glycerol. They are primarily the way the human body transports fatty acids in the plasma and stores them in tissues for energy or structural purposes.
Phospholipid
Phospholipids are glycerol compounds with two fatty acids attached and a head group containing a phosphate. They are amphiphilic, meaning they have both water-soluble and hydrophobic parts, allowing them to form cell membranes and the surface of lipoproteins, where they are crucial for fluidity and protein expression.
Lipoprotein
Lipoproteins are spherical particles that transport hydrophobic lipids like triglycerides and cholesterol through the water-based plasma. Their primary purpose is to deliver energy (triglycerides) and phospholipids to tissues, rather than solely delivering cholesterol, which most cells can synthesize themselves.
Lipoprotein Lipase
This is a powerful enzyme present in tissues like muscles and adipocytes that hydrolyzes (breaks down) the core triglycerides within large triglyceride-rich lipoproteins. This process causes the lipoprotein to shrink, releasing fatty acids for energy or storage, and extruding surface phospholipids.
Lipid Raft
A lipid raft is a specialized collection of specific phospholipids and free cholesterol within a cell membrane. The unique structural positioning created by the fatty acid makeup of these phospholipids allows certain cellular proteins, such as receptors, to locate and be expressed there, facilitating cell signaling and interactions.
5 Questions Answered
Dr. Dayspring was motivated by his age (71-72), accumulating morbidities (arthritic issues, cholecystectomy, fatty liver), and Peter Attia's podcast on longevity, which made him realize he wanted to extend his healthy lifespan.
The primary purpose of lipoproteins is to transport energy to tissues in the form of triglycerides, which cells oxidize for ATP, and to deliver essential phospholipids for cell membranes and the maturation of other lipoproteins like HDL.
Dr. Dayspring believes it's a waste of time to include HDL cholesterol in a lipid profile for risk assessment because its level does not reliably predict cardiovascular risk, nor does changing it necessarily improve patient outcomes.
Dr. Dayspring self-taught himself lipidology over about 10 years of intensive reading, making complex concepts understandable to himself as a general internist, and then developed a unique ability to explain and illustrate these concepts for others.
The specific fatty acid makeup (e.g., saturated vs. polyunsaturated) of phospholipids dictates the fluidity and structure of cell membranes and lipoprotein surfaces. This structure, particularly in areas like lipid rafts, is crucial for the proper localization and function of cellular proteins and receptors, impacting cell signaling and interactions.
25 Actionable Insights
1. Implement Modified Intermittent Fasting
Adopt a modified intermittent fasting regimen by consuming 700 calories or less per day with significant carbohydrate restriction for one week each month, as this led to significant weight loss (67 pounds in 11 months) and improved health markers for Dr. Dayspring.
2. Integrate Caloric Restriction to Optimize Metabolic Health
Incorporate caloric restriction for limited periods as a cornerstone of health strategy to powerfully deplete glycogen, reduce insulin, and intermittently turn off nutrient-sensing pathways, counteracting the metabolically destructive effects of constant feeding in modern environments.
3. Cultivate Strong Personal Motivation for Health Changes
Identify and internalize powerful personal motivations, such as the desire for longevity, family, and avoiding future morbidities, as this deep conviction can overcome initial skepticism and lead to sustained adherence to challenging health regimens.
4. Expect Broad Health Improvements from Fasting
Anticipate comprehensive health benefits from consistent modified intermittent fasting, including resolution of chronic orthopedic symptoms, improved mobility, normalization of cardiometabolic biomarkers (e.g., aminase levels), and overall biochemical health.
5. Persevere Through Initial Fasting Hunger
Understand that initial hunger pangs during a multi-day fast (e.g., days two or three) often subside, and with repeated practice, the body can adapt, leading to less hunger in subsequent fasting periods.
6. Seek Professional and Spousal Support for Dietary Changes
Engage with a dietitian for guidance on meal planning and logistics during restrictive diets, and enlist the support of a spouse or family member for meal preparation, as this external support significantly aids adherence.
7. Address Health Morbidities Proactively
Recognize the cumulative impact of aging and existing health morbidities (e.g., obesity, insulin resistance, arthritic issues, fatty liver) as a strong motivator to adopt healthier lifestyle changes for longevity and improved quality of life.
8. Ground Health Decisions in Scientific Plausibility
Base personal health and dietary decisions on scientifically plausible evidence and consider evolutionary genetic ancestry, rather than ad-libbed theories, to ensure effective and sustainable outcomes.
9. Re-evaluate HDL Cholesterol as a Risk Marker
Avoid making judgments about cardiovascular risk or the effectiveness of interventions solely based on high-density lipoprotein (HDL) cholesterol levels, as this metric is now considered grossly oversimplified and potentially misleading, with its primary utility being in calculations like non-HDL cholesterol.
10. Mitigate Cellular Cholesterol Toxicity Through Diet
Be aware that modern diets can lead to cells producing excessive cholesterol, turning it into a toxic molecule that crystallizes and damages cells; focus on dietary choices that support cellular mechanisms for cholesterol efflux to prevent this toxicity.
11. Optimize Phospholipid Intake for Cell Membrane Health
Recognize the critical role of phospholipids, particularly their fatty acid composition, in maintaining cell membrane fluidity, proper protein expression, and overall cellular signaling, which is essential for general health and lipoprotein functionality.
12. Understand Lipoproteins’ True Primary Function
Recognize that the primary purpose of the lipoprotein system is to transport energy (triglycerides/fatty acids) to tissues for ATP production, not primarily to deliver cholesterol, as most cells synthesize their own cholesterol.
13. Commit to Deep Self-Education in Complex Fields
Dedicate significant time (e.g., 10 years of serious reading) to self-educate in complex fields, even if initial comprehension is low, by persistently engaging with available materials until understanding solidifies, driven by a desire to improve professional practice.
14. Utilize Visuals for Learning and Explaining Complex Concepts
Employ graphical illustrations and visual aids to both learn and explain complex scientific or medical concepts, as the human brain processes visual information more effectively than text, enhancing comprehension for diverse audiences.
15. Persist Through Initial Frustration in Learning
When encountering complex and initially confusing information, persist by re-reading and re-engaging with the material multiple times, as initial frustration often gives way to deeper understanding and passion for the subject.
16. Strive for Excellence in Public Speaking and Education
Continuously refine your methods of explaining and illustrating complex topics in public speaking and educational settings to ensure clarity and engagement, as consistent excellence leads to demand and recognition.
17. Share Knowledge Through Regular Case Studies
Consider creating a regular, free newsletter or content series (e.g., weekly email) featuring real-world case discussions to share specialized knowledge, enhance your reputation, and build a dedicated audience.
18. Recognize the Half-Life of Scientific Facts
Be aware that scientific facts and understanding evolve over time, and information that was considered accurate in the past may now be outdated or incorrect, necessitating continuous learning and critical evaluation.
19. Leverage Third-Party Expertise for Family Health Interventions
When attempting to influence family members to adopt health protocols, especially if they are resistant to direct recommendations, leverage trusted third-party experts (e.g., dietitians, respected mentors) to provide guidance and encouragement.
20. Introduce Children to Passions Early
Expose children to personal passions and interests from a very young age (e.g., placing a hockey stick in a crib) to encourage early imprinting and potentially foster lifelong engagement and skill development.
21. Self-Teach New Physical Skills
Embrace the process of self-teaching new physical skills, such as ice skating and hockey, by starting with basic equipment and consistent practice, even if beginning later in life without formal instruction.
22. Value and Support Mentors for Long-Term Impact
Recognize the profound impact mentors can have on personal and professional development, and actively support their well-being and longevity to continue benefiting from their knowledge and guidance.
23. Follow Dr. Dayspring on Twitter
Follow Dr. Tom Dayspring on Twitter at @DrLipid (D-R-L-I-P-I-D) to access his insights and graphics on lipidology.
24. Utilize Corrected Transcripts
Access the editorialized and corrected versions of podcast transcripts in the show notes to thoroughly understand technical information, as they are meticulously reviewed for accuracy.
25. Explore Niche Historical Interests
If interested in historical firefighting, visit PattersonFireHistory.com to explore a vast collection of documented data, photographs, and the history of firefighting in the United States.
5 Key Quotes
I don't know how to express my gratitude towards Tom other than the way I probably do so in this podcast. And I really wanted to do this to share so much of the knowledge that Tom has given me with so many other people.
Peter Attia
I'm sorry, I'm just a Jersey boy. I just don't know how to sugarcoat it.
Tom Dayspring
I think it is safe to say that you could learn more in the next seven hours, meaning episodes one through five, than you would learn in a lipid fellowship.
Peter Attia
I just don't believe that they see that nowadays. Yes, they see acute coronary syndromes, but they don't see the type of acute coronary syndromes we saw back then.
Tom Dayspring
I personally think it's a waste of time to even put it in the lipid profile other than it's used in certain calculations that are popular nowadays, like non-HDL cholesterol. But I encourage no one to ever make a judgment on any human's cardiovascular risk based on their high-density lipoprotein cholesterol level.
Tom Dayspring
1 Protocols
Dr. Dayspring's Modified Intermittent Fasting Regimen
Peter Attia (proposed), Tom Dayspring (followed)- One week per month, consume 700 calories or less per day.
- Maintain significant carbohydrate restriction during the fasting week.
- Maintain carbohydrate restriction outside of the fasting week as well.