TABLE 2.

Strength of available evidence for breakfast and glucose/insulin response¹

	Breakfast consumption vs. skipping	Protein level comparisons	Fiber level comparisons	Glycemic index comparisons	Fat level comparisons
Acute effects
Quality	Fair	Fair	Good	Good	Fair
Consistency	Fair	Fair	Fair	Good	Fair
Quantity	Fair	Fair	Good	Good	Fair
Clinical impact	Fair	Fair	Fair	Good	Fair
Generalizability	Fair	Good	Good	Good	Good
Overall	Fair	Fair	Good	Good	Fair
Second and later meal effects
Quality	Good	Limited	Fair	Good	Fair
Consistency	Good	Limited	Fair	Fair	Limited
Quantity	Limited	Limited	Limited	Limited	Limited
Clinical impact	Good	Limited	Fair	Fair	Limited
Generalizability	Good	Limited	Good	Good	Fair
Overall	Good	Limited	Fair	Fair-Good	Limited

¹Based on the Academy of Nutrition and Dietetics Evidence Analysis Manual (76).