50. Glucose Is the Most Efficient Fuel | The ATP & Metabolism Science Explained (Part 1)

What if the most efficient fuel for the human body isn't fat… but glucose?

In this episode, Zane Griggs breaks down the actual biochemistry behind ATP production, mitochondrial efficiency, and why cardiologists actively try to shift failing hearts away from fat oxidation and back toward glucose oxidation.

This conversation dives deep into the P/O ratio, oxygen efficiency, insulin resistance, heart failure, ketones, metabolic flexibility, and the misunderstood role of glucose in human metabolism.

If you've been told that fat is always the superior fuel source, this episode may completely change how you think about metabolism, performance, and energy production.

In this episode:

Why glucose produces more ATP per oxygen molecule The truth about fat oxidation vs glucose oxidation Why the heart becomes "stuck" burning fat in heart failure The real meaning of metabolic flexibility Why insulin is not the villain it's been made out to be The difference between glycolysis and glucose oxidation Why ketones are not the "super fuel" many claim How mitochondrial inefficiency impacts metabolic disease The connection between diabetes, heart disease, and fuel selection This is Part 1 of a deeper metabolic series exploring insulin resistance, ATP production, glucose metabolism, and how the body actually creates energy.

Feeling "off" despite doing everything right?

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