Here is some information about importance of having breakfast:
Breakfast skipping has been consistently associated with increased cardiometabolic risks in children and adults, both in cross-sectional and longitudinal studies. These include higher risks for overweight and obesity, increased visceral adiposity, insulin resistance, type 2 diabetes, and dyslipidemia. For example a longitudinal study of 29 206 men with a follow-up at 16 yrs revealed that breakfast skipping was associated with a 21% increase in risk of developing type 2 diabetes, even after adjustment for body mass index (BMI) (1). Another study of 211 diabetic patients found that breakfast skipping, prevalent in approximately 25% of the participants, was associated with higher fasting plasma glucose levels, but not with hemoglobin A1C (HbA1C) values, which is the gold standard measurement of longer-term glycemic control (2). The study that examined the effect of dietary counseling on glycemic control over a 3-mo period in 50 participants with type 2 diabetes found that those who skipped breakfast during the study had poorer metabolic control (3).
The endogenous circadian (24-h) timing system, controlled by the master circadian clock in the suprachiasmatic nuclei of the hypothalamus, plays a significant role in regulating a number of daily physiologic rhythms, including sleep/wake and feeding behavior, peripheral tissue metabolism, energy expenditure, and hormonal profiles. Many animal studies suggest the importance of the circadian system in body weight regulation as well as glucose and lipid metabolism. Laboratory studies in healthy volunteers have also demonstrated adverse metabolic consequences to circadian disruptions. Severe circadian misalignment, involving sleep/wake and meal schedules 12 h out of phase from their habitual times resulted in increased postprandial glucose and insulin levels, elevated mean arterial pressure levels, as well as decreased leptin concentrations. These data support the importance of the circadian timing system in metabolic regulation.
Recently published study demonstrated that both breakfast skipping and having a later chronotype are associated withpoorer glycemic control in patients with type 2 diabetes. Breakfast skipping is associated with a 10.8% increase in HbA1C of its original value. For example, given similar demographics, a breakfast eater may be expected to have an HbA1C level of 7%, whereas a breakfast skipper would have an HbA1C level of 7.8%. A reduction in HbA1C by 0.9% in patients with type 2 diabetes has been shown to reduce progressions of microvascular complications; 21% for retinopathy and 34% for albuminuria, a marker for nephropathy
1. Mekary RA, Giovannucci E, Willett WC, et al. (2012). Eating patterns and type 2 diabetes risk in men: breakfast omission, eating frequency, and snacking. Am J Clin Nutr. 95: 1182–9.
http://www.ncbi.nlm.nih.gov/pubmed/22456660
2. Kollannoor-Samuel G, Chhabra J, Fernandez ML, et al. (2011). Determinants of fasting plasma glucose and glycosylated hemoglobin among low income Latinos with poorly controlled type 2 diabetes. J Immigr Minor Health. 13:809–17.
http://www.ncbi.nlm.nih.gov/pubmed/21181446
3. Schmidt LE, Rost KM, McGill JB, Santiago JV. (1994). The relationship between eating patterns and metabolic control in patients with non-insulin-dependent diabetes mellitus (NIDDM). Diabetes Educ. 20:317–21.
http://www.ncbi.nlm.nih.gov/pubmed/7851248
4. Reutrakul S, Hood MM, Crowley SJ, Morgan MK, Teodori M, Knutson KL. (2013) The Relationship Between Breakfast Skipping, Chronotype, and Glycemic Control in Type 2 Diabetes. Chronobiol Int. 2013 Oct 4.
http://www.ncbi.nlm.nih.gov/pubmed/24094031