The Claim

In adults with severe obesity, a 150-day protein-sparing modified fast diet delivered via nasogastric tube results in significantly lower fat mass (36.9 kg vs. 44.0 kg) and fat mass percentage (37.4% vs. 44.9%) compared to oral delivery, despite no difference in total body weight loss.

Source: The Real-Life Use of a Protein-Sparing Modified Fast Diet by Nasogastric Tube (ProMoFasT) in Adults with Obesity: An Open-Label Randomized Controlled Trial

What the research says

Supports is higher

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

Supports
61score
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 adults with severe obesity, receiving a 150-day protein-sparing modified fast diet through a nasogastric tube leads to lower fat mass and lower percentage of body fat compared to taking the same diet by mouth, even though total weight loss is the same in both groups.

See the scientific wording

In adults with severe obesity, a 150-day protein-sparing modified fast diet delivered via nasogastric tube results in significantly lower fat mass (36.9 kg vs. 44.0 kg) and fat mass percentage (37.4% vs. 44.9%) compared to oral delivery, despite no difference in total body weight loss.

Why this might work

When protein is delivered continuously through a tube into the intestine, it keeps amino acid levels high in the blood, which turns on muscle-building signals and blocks muscle breakdown. At the same time, the very low carbohydrate intake keeps insulin levels low, which lets fat cells release stored fat instead of storing more. This combination causes the body to lose more fat while keeping more muscle, even when total weight loss is the same as eating the same food by mouth.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: The Real-Life Use of a Protein-Sparing Modified Fast Diet by Nasogastric Tube (ProMoFasT) in Adults with Obesity: An Open-Label Randomized Controlled Trial

    When severely obese people eat a very low-calorie, high-protein diet through a feeding tube instead of by mouth, they lose more fat and keep more muscle—even though they lose the same total weight. The tube method works better for shaping the body.

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

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