Research Shows It's Not The Fructose — Key Takeaways
Fructose is not uniquely toxic or the primary driver of fatty liver disease — free fatty acids (elevated on low-carb diets and fasting) contribute roughly 60% of liver fat, so favorable carb sources like fruit, honey, and maple syrup don't need to be feared.
Key takeaways
Free fatty acids are the primary substrate for liver fat in NAFLD
Free fatty acids are the primary substrate for liver fat in NAFLD
- Study: 60% of liver triglycerides in NAFLD come from non-esterified fatty acids, not carbohydrates.
- Only 25% from de novo lipogenesis (carbs), 15% from dietary fat.
Low-carb and fasting raise free fatty acids 2-3x
Low-carb and fasting raise free fatty acids 2-3x
- Study: low-carb diet doubled free fatty acids vs control; 67h fast tripled them.
- Even post-meal, keto dieters maintained higher free fatty acids than carb group.
Fructose to blame for fatty liver? Low-carb advocates ignore bigger driver
Fructose to blame for fatty liver? Low-carb advocates ignore bigger driver
- The same inflammatory pathways blamed on fructose are triggered more strongly by free fatty acids.
- Low-carb, high-fat diets increase these free fatty acids, creating a contradiction in Lustig's logic.
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In this video
- 1mlow-carb, high-fat diets trigger the exact mechanisms Dr. Lustig blames on fructose
- 10mwhat really causes fatty liver disease
- 14mshould we avoid fructose-containing foods to fix fatty liver disease? Is soda and candy the answer?
“The primary substrate for fat production in fatty liver disease is free fatty acids.”
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