How diet and lifestyle regulate longevity with Dr. Valter Longo and Dr. Rhonda Patrick
FoundMyFitnessKey Moments
Fasting and diet regulate aging and disease by impacting key pathways like IGF-1 and mTOR, with fasting-mimicking diets showing promise.
Key Insights
Fasting and calorie restriction modulate aging, but different types of fasting (intermittent vs. prolonged vs. time-restricted) have distinct effects.
Calorie restriction in monkeys significantly reduced age-related diseases but had a smaller impact on lifespan.
Key aging pathways like IGF-1, mTOR, and PKA are influenced by nutrient intake, particularly amino acids and glucose.
Growth hormone receptor deficiency, leading to low IGF-1, is linked to increased lifespan and reduced disease incidence in mice and humans.
The fasting-mimicking diet (FMD) is designed to replicate fasting benefits while allowing food intake, showing promise in preclinical and human studies for disease risk reduction and rejuvenation.
FMD can help normalize markers like blood pressure, cholesterol, triglycerides, glucose, and inflammation, particularly in individuals with elevated levels.
Periodic FMD may be a viable strategy for weight loss, potentially improving metabolic flexibility and preserving lean body mass while targeting visceral fat.
Fasting and FMD can induce cellular repair mechanisms like autophagy and stem cell activation, leading to organ rejuvenation and potential benefits for autoimmune diseases and neurodegeneration.
The refeeding phase after fasting is crucial for rebuilding tissues and is supported by sufficient protein intake, which also influences IGF-1 for cell proliferation.
While FDA approval for diets as medical treatments is a long and expensive process, FMD can be considered experimentally by oncologists and patients under medical supervision.
DEFINING AND DISTINGUISHING DIETARY INTERVENTIONS
Dr. Valter Longo clarifies the terminology surrounding dietary interventions for longevity, distinguishing between caloric restriction (chronic reduction of calories), time-restricted feeding (specific eating windows), intermittent fasting (various frequencies of restriction), and periodic prolonged fasting or fasting-mimicking diets (FMD). He emphasizes that these modalities, while all involving food limitation, have unique mechanisms and outcomes. For instance, intermittent fasting is too broad a term, encompassing vastly different practices. Prolonged fasting and FMD, which Longo primarily researches, involve extended periods of very low caloric intake, differing significantly from daily time-restricted eating.
CALORIC RESTRICTION AND ITS IMPACT ON AGING
Studies on caloric restriction, particularly in primates, have shown remarkable effects on reducing age-related diseases such as diabetes, cancer, and cardiovascular disease by up to 50%. However, the impact on lifespan has been less consistent, with some studies showing modest increases and others showing no significant change. This highlights a potential dissociation between healthspan, the period of healthy living, and lifespan, the total duration of life. The variations in outcomes may be influenced by genetic background and the specific composition of the restricted diet.
KEY PATHWAYS REGULATING LONGEVITY
Central to aging and longevity are nutrient-sensing pathways like IGF-1, mTOR, and PKA. Proteins, especially certain amino acids, and sugars influence these pathways. Lowering IGF-1 and growth hormone signaling, as seen in individuals with growth hormone receptor deficiency (Laron's syndrome), is associated with extended lifespan and protection from diseases like cancer and diabetes in both mice and humans. This suggests that modulating these pathways is a viable strategy for promoting health and longevity.
DEVELOPMENT AND MECHANISMS OF THE FASTING-MIMICKING DIET
The fasting-mimicking diet (FMD) was developed to achieve the benefits of fasting without requiring complete food abstinence, particularly for patients undergoing cancer treatment who were unwilling to fast. The FMD is formulated to specifically lower the levels of proteins, sugars, and other components that activate aging pathways like IGF-1 and mTOR, while simultaneously promoting cellular protective mechanisms. It has been shown to effectively reduce IGF-1, insulin, glucose, and ketone bodies, mimicking the metabolic effects of water-only fasting.
CLINICAL APPLICATIONS AND BENEFITS OF FMD
Clinical trials with FMD in healthy subjects have demonstrated significant improvements in aging and disease risk biomarkers. Notably, the FMD normalizes elevated levels of blood pressure, cholesterol, triglycerides, fasting glucose, and C-reactive protein (CRP), while having minimal impact on individuals with already healthy levels. This targeted effect suggests a system reset rather than a uniform reduction. Studies also indicate that about 60% of these benefits are sustained three months after the intervention, suggesting a need for periodic FMD application.
FMD FOR WEIGHT LOSS AND BODY COMPOSITION
Periodic FMD shows potential as a strategy for weight loss, particularly for individuals struggling with obesity. Unlike traditional prolonged low-calorie diets that can lower metabolism, FMD appears to enhance metabolic flexibility and preserve lean body mass while targeting visceral fat. The cyclical nature of FMD, with a brief fasting period followed by refeeding, may help individuals maintain a healthy metabolism and psychological adherence, making it a more sustainable approach for long-term weight management.
CELLULAR REPAIR AND REJUVENATION THROUGH FASTING
Fasting and FMD trigger cellular repair processes, including autophagy and stem cell activation. This leads to the depletion of damaged cells and intracellular components, followed by regeneration during the refeeding phase. This 'self-repair' mode, possibly an evolved mechanism, can help address various diseases, including autoimmune disorders and neurodegeneration. The controlled breakdown and rebuilding process appears crucial for rejuvenating tissues and restoring optimal function.
THE ROLE OF REFEEDING AND PROTEIN IN REGENERATION
The refeeding phase following fasting is critical for rebuilding tissues and is significantly influenced by nutrient availability, particularly protein. Sufficient protein provides the building blocks necessary for cellular repair and drives growth factors like IGF-1, which are essential for stem cell proliferation and differentiation. This highlights the importance of a balanced approach, where the catabolic phase of fasting is complemented by an anabolic refeeding phase to achieve optimal rejuvenation and functional recovery.
POTENTIAL THERAPEUTIC APPLICATIONS AND FUTURE DIRECTIONS
FMD is being explored as a complementary intervention for various chronic diseases, including diabetes, cardiovascular disease, Alzheimer's, and cancer. While challenges like food aversion and the lengthy FDA approval process exist, ongoing clinical trials and growing physician recommendation point to its promise. Future research will focus on optimizing FMD protocols, clarifying its role in stem cell activation, and further investigating its potential as a 'self-repair' mechanism to combat a wide range of age-related conditions.
Mentioned in This Episode
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●Concepts
●People Referenced
Common Questions
Intermittent fasting is a broad term, while time-restricted feeding focuses on the daily eating window. Periodic prolonged fasting involves longer periods of not eating, such as 2 days or more, or using a fasting-mimicking diet.
Topics
Mentioned in this video
Valter Longo's former teacher, whose work on calorie restriction in the '90s influenced Longo.
Valter Longo's book discussing everyday diet principles for longevity and the fasting-mimicking diet for various diseases.
Funded research into the fasting-mimicking diet.
A type of cell involved in remyelination, which is activated during fasting in models of multiple sclerosis.
An amino acid that, along with others, regulates IGF-1 levels.
Researcher who studied the effects of growth hormone deficiency in mice.
A class of drugs used in cancer treatment that can be combined with fasting.
A signaling pathway that, like IGF-1 and TOR, appears to be down-regulated by fasting-mimicking diets.
The brand name for the fasting-mimicking diet tested in clinical trials.
Fasting for at least 2 days or more, or using a fasting-mimicking diet for at least 2 days, not necessarily frequent.
IGF-1 Binding Protein 1, affected by fasting-mimicking diets and potentially by glucose intake.
Student of Roy Walford who worked on a caloric restriction monkey study.
A syndrome in Ecuador characterized by growth hormone receptor deficiency, equivalent to growth hormone deficient mice, showing protection from cancer and diabetes.
A central enzyme in cellular signaling that is activated by glucose and IGF-1, and is influenced by fasting-mimicking diets.
Stem cells that give rise to all blood cells, activated by fasting and crucial for rebuilding the immune system.
Researcher who studied the effects of growth hormone deficiency in mice.
Metabolic byproducts produced during fasting or ketogenic diets, which can be used by both cancer cells and healthy cells.
C-reactive protein, a marker for systemic inflammation that tends to normalize with the fasting-mimicking diet.
Diets involving repeated cycles of weight loss and gain, which are often associated with lowering metabolism, but may be contrasted with periodic fasting.
Institution where a trial with athletes is being conducted, including muscle biopsies.
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