The claim

A common online claim holds that eating 30 grams of protein at breakfast transforms appetite control. The underlying research is more limited.

What studies actually measured

Several small trials found improved short-term satiety scores with higher-protein breakfasts. Long-term weight outcomes were mixed and depended heavily on total daily intake.

A reasonable takeaway

Total daily protein and overall diet quality remain the primary factors in most published research. Meal timing appears to be secondary.