Glucose/Starch Vs Fructose To Rasie Thyroid/glycogen

7asssa7

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Ray Peat in his articles claims that fructose is more thermogenic and is better at stimulating thyroid than Glucose/Starch. He goes as far as to say that Fructose stimulates T4 to T3 conversion much better than glucose and that fructose is less likely to be stored as fat.

Is he right about fructose being more thermogenic, increasing T3 and metabolism? What about glycogen levels?
 

jaguar43

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7asssa7 said:
Ray Peat in his articles claims that fructose is more thermogenic and is better at stimulating thyroid than Glucose/Starch. He goes as far as to say that Fructose stimulates T4 to T3 conversion much better than glucose and that fructose is less likely to be stored as fat.

Is he right about fructose being more thermogenic, increasing T3 and metabolism? What about glycogen levels?


Am J Clin Nutr 1993 Nov;58(5 Suppl):766S-770S. Fructose and dietary thermogenesis. Tappy L, Jequier E. “Fructose ingestion induces a greater thermogenesis than does glucose. This can be explained by the hydrolysis of 3.5-4.5 mol ATP/mol fructose stored as glycogen, vs 2.5 mol ATP/mol glucose stored. Therefore the large thermogenesis of fructose corresponds essentially to an increase in obligatory thermogenesis. Obese individuals and obese patients with non-insulin-dependent diabetes mellitus commonly have a decrease in glucose-induced thermogenesis. These individuals in contrast display a normal thermogenesis after ingestion of fructose. This may be explained by the fact that the initial hepatic fructose metabolism is independent of insulin.”

http://raypeat.com/articles/articles/glycemia.shtml

I have read that fructose is more efficient for glycogen stores than glucose.

Fructose can bypass FFA's and increases the kreb cycle. glycogen levels can be lower by many things. Estrogen, high blood pressure , hypothyroid and other things.
 

ddjd

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in another thread 'Ben' said:

"Fructose keeps glucose in the bloodstream and this inhibits cortisol, which is the primary inhibitor of T4-T3 conversion."
 
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