Research
Energy balance
Approximately 41% of ingested fructose is converted to glucose within 2-6 hours in normal non-exercising subjects, with lower conversion rates observed in women, obese, and diabetic individuals.
If you consume fructose, expect about 40% of it to turn into glucose in your body within a few hours. This effect is weaker in women and people with diabetes or obesity.
GoodQualifiesHIGH confidence
These data suggest that 41% ±10.5 (mean ± SD, range 29-54%) of fructose can be converted to glucose within 2–6 hours after ingestion in normal non-exercise subjects. This conversion may be lower in women compared to men, and obese and diabetic subjects may also have lower conversion capability.
Why this rating
Based on multiple tracer studies reviewed.
Source
Fructose metabolism in humans – what isotopic tracer studies tell us
Sam Z. Sun et al. · Nutrition & Metabolism · 2012
DOI 10.1186/1743-7075-9-89
narrative_reviewCited 305×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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