Your body can rebuild its sugar stores even without eating carbs, as long as you wait a full day.
Scientific Claim
Glycogen re-synthesis can occur on a low-carbohydrate diet within 24 hours via gluconeogenesis from lactate, glycerol, and amino acids.
Original Statement
“The body has multiple pathways by which it can re-synthesize the glycogen, even on a low carbohydrate diet, as long as it has at least 24 hours to achieve this.”
Context Details
Domain
nutrition
Population
human
Subject
the body
Action
can re-synthesize glycogen via
Target
gluconeogenesis from lactate, glycerol, and amino acids within 24 hours on a low-carbohydrate diet
Intervention Details
Evidence from Studies
Supporting (2)
Low-Carbohydrate-High-Fat Diet: Can it Help Exercise Performance?
Even without eating lots of carbs, the body can still rebuild its energy stores (glycogen) by turning other things like fat and protein into sugar—this study shows athletes on low-carb diets keep their energy levels just as high as those on high-carb diets.
This paper explains that the liver can turn lactate, fat leftovers (glycerol), and muscle proteins (amino acids) into sugar, and then store that sugar as glycogen — exactly what the claim says happens on a low-carb diet.
Contradicting (1)
The study found that on a low-carb diet, muscles rebuilt their energy stores much slower than on a high-carb diet, and didn’t fully recover by 24 hours — which contradicts the claim that low-carb diets can quickly rebuild muscle energy using other sources like protein and fat.