For athletes who need to make weight (like wrestlers or boxers), eating low-carb and high-fat for a long time might help them lose fat without losing muscle, which is safer than starving or sweating off weight quickly.

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Evidence from Studies

Supporting (1)

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Low-Carbohydrate-High-Fat Diet: Can it Help Exercise Performance?

Narrative Review

2017 Feb

This study found that athletes who eat mostly fat and little carbs for a long time can lose body fat without losing muscle, which is exactly what the claim says — and it might be safer than starving or sweating off weight.

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Low-Carbohydrate-High-Fat Diet: Can it Help Exercise Performance?

Score: 1

DOI: 10.1515/hukin-2017-0025

Similar Assertions

Eating fewer carbs and calories helps overweight people lose weight by improving how their bodies process energy. This finding is from the abstract summary - full study details were not available

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75%

Adding high-intensity interval training to a very low-carb diet doesn't stop the muscle loss that happens when people with excess body fat eat very few carbs for 12 weeks.

73%

Eating very few carbs and more fats for 12 weeks makes the dangerous belly fat around organs shrink by about a quarter in people who have too much body fat.

72%