In this episode of The Metabolic Classroom, Dr. Bikman, a biomedical scientist and professor of cell biology, delves into the concept of energy toxicity.

He begins by explaining that energy toxicity attempts to explain why certain cells, particularly those capable of storing energy like muscle and liver cells, become insulin resistant. The primary idea is that when these cells accumulate excess energy, particularly in the form of triglycerides, they become resistant to further energy storage by becoming insulin resistant. He clarifies that this is closely related to lipotoxicity, where the stored fat itself, rather than glycogen, is seen as the main culprit for this condition.

Ben notes that while the notion of energy toxicity encompasses both glucose and fats, triglycerides, a type of fat stored in muscle and liver cells, play a significant role. However, studies, such as one on endurance athletes, have shown that muscle triglycerides alone do not cause insulin resistance, leading to the concept of the “athlete’s paradox.”

Dr. Bikman further explores the biochemical pathways involved in insulin resistance, emphasizing that specific lipid intermediates, particularly diacylglycerols (DAGs) and ceramides, are more relevant than triglycerides in causing insulin resistance. DAGs disrupt the insulin signaling pathway by activating protein kinase C, while ceramides inhibit insulin signaling and affect mitochondrial function, increasing reactive oxygen species and contributing to insulin resistance.

Ben challenges the notion of energy toxicity as a primary cause of insulin resistance, advocating instead for a focus on lipotoxicity and its mediators. He concludes that chronically elevated insulin levels, rather than the stored energy itself, are the main drivers of insulin resistance, suggesting that the term “insulin toxicity” might be more appropriate. This understanding is crucial for addressing what he identifies as the most common health issue worldwide—insulin resistance.

01:16: Defining Energy Toxicity

02:58: Lipotoxicity vs. Energy Toxicity

06:20: Ectopic Fat Storage

08:20: Triglycerides in Muscle Cells

13:57: The Athlete's Paradox

17:11: DAGs and Insulin Resistance

19:26: Ceramides and Mitochondrial Function

29:21: Insulin and Lipolysis

33:59: High Insulin and Insulin Resistance

Studies Referenced:

A phenomenon known as the “athlete’s paradox”:

https://academic.oup.com/jcem/article/86/12/5755/2849249

https://www.sciencedirect.com/science/article/abs/pii/S0165614717300962?via=ihub

https://www.sciencedirect.com/science/article/pii/S0021925820859080?via=ihub

https://www.jci.org/articles/view/43378

#MetabolicHealth #InsulinResistance #EnergyToxicity #Lipotoxicity #BenBikman #CellBiology #Triglycerides #DiabetesResearch #FatMetabolism #EctopicFat #KetogenicDiet #InsulinSensitivity #MitochondrialFunction #MetabolicClassroom #HealthScience #BiomedicalResearch #Endocrinology #Metabolism #HealthEducation #Type2Diabetes

https://www.insuliniq.com

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In this episode of The Metabolic Classroom, Dr. Bikman begins by emphasizing the critical role of insulin in regulating the body’s use of fuel, and influencing whether nutrients are stored or burned.

He highlights that food is a primary driver of insulin levels, but other factors like stress and sleep deprivation significantly impact insulin resistance.

Stress, often exacerbated by poor sleep hygiene, leads to elevated levels of cortisol and epinephrine, which in turn increase blood glucose levels. Ben explains that going to bed on a full stomach can worsen sleep quality, further contributing to insulin resistance.

Dr. Bikman discusses a study showing that restricting sleep to five hours per night for a week resulted in significant increases in cortisol and epinephrine, along with a notable decrease in insulin sensitivity. This chronic elevation of stress hormones due to poor sleep disrupts the natural circadian rhythm, causing a constant high level of cortisol, which not only hampers insulin function but also damages muscle, bone, and skin by promoting the breakdown of proteins for glucose production.

Dr. Bikman advises improving sleep hygiene, such as reducing evening snacking and dimming lights, rather than relying on stimulants like caffeine, which can exacerbate cortisol levels and insulin resistance.

00:57 - Impact of Stress on Insulin Resistance

01:59 - Effect of Evening Eating on Sleep Quality

02:59 - Study on Sleep Restriction and Insulin Sensitivity

04:10 - Stress Hormones and Sleep Deprivation

07:53 - Circadian Rhythm Disruption

08:54 - Cortisol’s Broader Effects

10:45 - Advice on Improving Sleep Hygiene

Studies referenced in this episode:

https://diabetesjournals.org/diabetes/article/59/9/2126/14525/Sleep-Restriction-for-1-Week-Reduces-Insulin

https://pubmed.ncbi.nlm.nih.gov/20371664/

#InsulinResistance #MetabolicHealth #DrBenBikman #Nutrition #Health #SleepDeprivation #StressManagement #Hormones #Cortisol #HealthyEating #SleepHygiene #InsulinSensitivity #Glucose #CircadianRhythm #KetogenicDiet #DiabetesPrevention #HealthTips #Wellness #Caffeine #HealthyLifestyle

https://www.insuliniq.com

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In this episode of The Metabolic Classroom, Dr. Bikman explores the history, science, and benefits of ketones, focusing on exogenous ketones.

Ben highlights the significant benefits of ketones for brain health. He disputes the common belief that glucose is the brain’s preferred fuel, citing research by Dr. George Cahill that indicates the brain relies heavily on ketones during fasting.

The classroom also addresses the evolution and advantages of exogenous ketones. Early forms of exogenous ketones, like ketone salts, had limitations such as mineral imbalance and poor taste. Advances led to the development of ketone esters and bioidentical BHB, which are more effective and palatable. Exogenous ketones can help control appetite, reduce inflammation, and improve exercise performance. Despite initial concerns about their potential to be converted back into fat, Professor Bikman clarifies that this is not a risk, as the liver cannot reverse ketone production into fat.

Overall, Dr. Bikman emphasizes that while ketones themselves offer numerous metabolic benefits, the primary advantage of a ketogenic state is maintaining low insulin levels, which supports fat burning and overall metabolic health. He encourages the use of exogenous ketones to enhance these benefits, particularly for managing cravings, improving physical performance, and supporting cognitive function.

00:01 - Introduction to Ketones

01:58 - Types of Ketones - Explanation of the three main types of ketones: acetoacetate, acetone, and beta-hydroxybutyrate.

02:58 - Ketones and Blood Acidity - Discussion on how ketones can affect blood acidity and the distinction between ketosis and ketoacidosis.

04:04 - Insulin's Role in Ketone Production - How insulin levels determine whether the body produces fat or ketones from acetyl-CoA.

07:23 - Benefits of Low Insulin Levels - Overview of the metabolic benefits of low insulin levels, including improved fat burning and metabolic health.

08:19 - Ketones and Brain Health - The positive effects of ketones on brain function and cognitive health, debunking the myth that glucose is the brain's preferred fuel.

13:33 - Ketones and Physical Performance - Evidence that ketones improve physical performance and energy efficiency in muscle cells.

17:31 - Anti-inflammatory Effects of Ketones - Ketones’ role in inhibiting inflammation and their benefits for inflammatory disorders.

Studies Referenced:

Alzheimer’s and Parkinson’s (Cunnane et al., 2016): https://alzres.biomedcentral.com/articles/10.1186/s13195-021-00783-x

Ketones Elicit Distinct Alterations in Adipose Mitochondrial Bioenergetics: https://pubmed.ncbi.nlm.nih.gov/32872407/

Ketogenic Diet Reduces Midlife Mortality and Improves Memory in Aging Mice: https://pubmed.ncbi.nlm.nih.gov/28877458/

The Effects of Ketogenic Diet on Insulin Sensitivity and Weight Loss, Which Came First: The Chicken or the Egg?: https://pubmed.ncbi.nlm.nih.gov/37513538/

Learn more: https://www.insuliniq.com

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