How Mitochondria Control Your Metabolism | Dr. Jared Rutter

September 7, 2026

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5 min read

How Mitochondria Control Your Metabolism

Dr. Jared Rutter opens with a striking claim: "There's a widely accepted hypothesis that mitochondria with excess energy leads to problems." When mitochondria are overpowered, they become susceptible to generating reactive oxygen species—forms of oxygen that damage proteins and nucleic acids, creating mutations and contributing to aging and disease. This sets the stage for a conversation that goes far beyond the familiar "powerhouse of the cell" description.

Your Body's Constellation of Metabolisms

Most people think of metabolism as a single number—calories in versus calories out. Rutter offers a different picture. Your body's metabolism is actually the sum total of the metabolisms of each of your roughly 30 trillion individual cells. Each cell takes in nutrients and processes them according to its specific needs.

This cellular view changes everything. A heart muscle cell (cardiomyocyte) has one primary job: contract every second of every day for your entire life. Its mitochondria are wired to consume whatever fuel is available and convert it to ATP, the energy currency that powers that contraction. By contrast, the stem cells lining your intestine need to completely duplicate themselves every five to seven days. Their metabolic program prioritizes building biomass—new DNA, proteins, and membranes—rather than just making ATP.

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What you'll learn

1 (00:00) **Energy Toxicity & Reactive Oxygen Species** - Introduces the hypothesis that over-energized mitochondria generate damaging reactive oxygen species.
2 (01:00) **Welcome & Episode Overview** - Andrew Huberman introduces Dr. Jared Rutter and frames the conversation around metabolism and mitochondria.
3 (02:29) **Defining Metabolism: Organism vs. Cell** - Dr. Rutter distinguishes between whole-body metabolism and cellular metabolism.
4 (05:36) **Why Cells Lose Energy with Age** - Explores the cellular basis for the decline in energy as we get older.
5 (08:36) **Why Study Mitochondria?** - Dr. Rutter explains his fascination with mitochondria, their evolutionary origin, and their critical role.
6 (13:06) **Mitochondrial Inheritance & Spatial Distribution** - Discusses how mitochondria are inherited and why they are distributed throughout the cell.
7 (20:44) **Diversification of Mitochondria** - Explains that mitochondria are different in every cell type and even within a single cell.

+ Full timestamped outline available in the app

Show Notes

Dr. Jared Rutter, PhD, Professor of Biochemistry at the University of Utah and Howard Hughes Medical Institute Investigator, is a leading expert on mitochondria and metabolism. He explains how mitochondria produce the energy for your cells to work but also how they regulate cell growth and replication and thereby contribute to health and disease. We also discuss how mitochondria are linked to aging, cancer, and other diseases. Our conversation explores your metabolism as the composite of trillions of individual cells and points to new ways to improve health, avoid, and treat diseases.

Show notes: https://go.hubermanlab.com/297-jared-rutter

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Timestamps

(00:00:00) Jared Rutter

(00:02:29) Metabolism, Cells; Aging

(00:08:36) Mitochondria, Origin & Cell Complexity