Sugar Diet & Randle Cycle Confusion: You CAN Eat Carbs With Fat — Key Takeaways
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Sugar Diet & Randle Cycle Confusion: You CAN Eat Carbs With Fat
Jay Feldman Wellness12mJun 18, 2025
Watch the originalThe Randle cycle operates at the cellular level and does not prevent the body from using carbs and fats simultaneously across different tissues — eating both together does not cause weight gain or metabolic dysfunction in healthy individuals.
Key takeaways
Very low-fat diets reduce bile flow, raising SIBO and estrogen/toxin clearance risk
Very low-fat diets reduce bile flow, raising SIBO and estrogen/toxin clearance risk
- Bile has strong antibacterial effects in the small intestine; less dietary fat = less bile = higher SIBO and fungal overgrowth risk.
- Bile clears estrogen, pesticides, and heavy metals from the liver — reduced flow impairs detox of all three.
Body fuel use mirrors dietary fat/carb ratio — respiratory quotient tracks food quotient
Body fuel use mirrors dietary fat/carb ratio — respiratory quotient tracks food quotient
- Studies show if you eat 80% carbs/20% fat, your body burns ~80% carbs/20% fat — not one or the other.
- Exceptions only appear at extremes (very low-fat or very low-carb), where the body compensates via conversion pathways.
Excessively low-fat diets consistently lower testosterone and DHT in men long-term
Excessively low-fat diets consistently lower testosterone and DHT in men long-term
- Research shows reduced reproductive hormones on very low-fat diets; initial weight loss may mask this by lowering estrogen first.
- Prolonged adherence reverses the hormonal benefit — testosterone suppression then dominates, threatening lean and bone mass.
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In this video
- 1mRandle Cycle misconceptions: do you need to separate carbs and fats?
- 4mhow low-fat diets work to improve glucose metabolism and misapplications of the Randle cycle
- 8mlow-fat diets and hormones: low testosterone and DHT levels in men
“There's nothing about the Randle cycle that dictates that your muscles can't be using fat while your brain is using glucose.”
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