Research

Hormonal

A single meal containing 72g of digestible carbohydrates inhibits ketosis (lipolysis) for several days, with recovery time dependent on baseline fasting insulin levels.

If you are relying on ketosis for fat loss, avoid high-carb meals entirely. A single meal with ~72g of carbs (e.g., bread and jam) can stop fat burning for 2 to 5 days, or indefinitely if your fasting insulin is high. Recovery time depends on your metabolic health; those with higher insulin levels may never recover ketosis within a standard 2-week window.

ModerateRefutesMEDIUM confidence
After the ingestion of the carbohydrate meal, the fasting breath acetone concentration significantly dropped to 5.7 ppm (p = 0.0014), and it took 5 days to achieve stable ketosis again... individuals with lower fasting insulin levels achieved stable ketosis again after 2 days and persons with medium insulin levels took 5 days, while those with higher baseline values did not reach the stable ketosis range by the end of the study
Kerstin Kempf et al. · Nutrients · 2024

Why this rating

Small sample size (n=10), single-group non-blinded design, but statistically significant results (p=0.0014).

Source

Effects of a Carbohydrate Meal on Lipolysis

Kerstin Kempf et al. · Nutrients · 2024

DOI 10.3390/nu16203531

cohort · n=10Cited 1×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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