The Claim

A 1-month very-low-calorie ketogenic diet in women with obesity is associated with a 65% reduction in carbohydrate oxidation and an 11% increase in fat oxidation, reflecting a metabolic shift toward fat utilization as the primary fuel source.

Source: Effects of 1-Month Very-Low-Calorie Ketogenic Diet on 24-Hour Energy Metabolism and Body Composition in Women With Obesity

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
53score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

In women with obesity, following a very-low-calorie ketogenic diet for one month results in a 65% decrease in the body's use of carbohydrates for energy and an 11% increase in the use of fat for energy.

See the scientific wording

A 1-month very-low-calorie ketogenic diet in women with obesity is associated with a 65% reduction in carbohydrate oxidation and an 11% increase in fat oxidation, reflecting a metabolic shift toward fat utilization as the primary fuel source.

Why this might work

When carbohydrate intake drops very low, the body runs out of stored sugar in the liver, so it starts breaking down fat for energy. The liver turns that fat into ketones, which the brain and muscles use instead of sugar. This stops the body from burning sugar and makes it burn fat instead.

Verified mechanismbased on 1 study

What the research says

1 study
  1. Study: Effects of 1-Month Very-Low-Calorie Ketogenic Diet on 24-Hour Energy Metabolism and Body Composition in Women With Obesity

    After one month on a very low-calorie keto diet, the study found that women burned 65% less carbs and 11% more fat for energy — just like the claim says. This means their bodies switched to using fat as the main fuel.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.