The Claim

In healthy adults with a BMI of 20–30 kg/m², consuming egg white protein shakes providing 20% of daily energy needs prior to meals increases the percentage of daily calories derived from protein to approximately 25.8% without reducing overall energy intake.

Source: A randomized cross-over trial to determine the effect of a protein vs. carbohydrate preload on energy balance in ad libitum settings

What the research says

Supports is higher

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

Supports
88score
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

When healthy adults with a normal body weight consume egg white protein shakes before meals, the proportion of their daily calories coming from protein rises to about 25.8%, and their total calorie intake does not decrease.

See the scientific wording

In healthy adults with a BMI of 20–30 kg/m², consuming egg white protein shakes providing 20% of daily energy needs prior to meals increases the percentage of daily calories derived from protein to approximately 25.8%, without reducing overall energy intake, suggesting that protein supplementation can elevate dietary protein proportion without triggering compensatory reductions in ad libitum intake.

Why this might work

When egg white protein is consumed before meals, the body uses more energy to break down and process the protein than it does for carbohydrates or fats. This increased energy use does not cause the person to eat less food later, so the total calories consumed stay the same, but the proportion of those calories coming from protein rises because the protein shake adds extra protein without replacing other foods.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: A randomized cross-over trial to determine the effect of a protein vs. carbohydrate preload on energy balance in ad libitum settings

    When healthy people with normal weight drank protein shakes before meals, their daily diet ended up being about 26% protein — even though they ate the same amount of food as before. So adding protein didn’t make them eat less, but it did raise the protein share of their diet.

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

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