MSc. Florencia Braga. Manager, Scientific Affairs, EMEA. Herbalife Nutrition.
Breakfast literally means ‘break the fast’, as it is the first meal of the day designed to break the fast after the night period and is usually consumed within two to three hours of waking. Regarding its nutritional composition, a healthy breakfast should provide between 15 to 25% of the total daily energy intake [1,2], and should achieve between 10 to 20% of the Daily Reference Value (DRVs) for fibre and most vitamins and minerals. Greater percentages of nutrients like Calcium should be covered with this meal [1,2].
Even though there is flexibility on which food groups should be consumed during breakfast, protein-rich, nutrient-dense, carbohydrate-rich (cereals, grains, fruit or/and vegetables) foods are considered essential to replenish nutrient storage after the period of fasting while sleeping . Regarding protein-rich foods, it is advised to choose from eggs, lean meat, meat substitutes (vegetable protein), legumes, nuts, and dairy products with special attention in controlling sodium and saturated fat levels .
Breakfast is frequently regarded as the most important meal of the day, and although every meal is important, science has shown that a daily breakfast provides a wide range of health benefits not only on physical, but also on mental health.
Breakfast and diet quality
There is evidence showing that those individuals who have breakfast on a regular basis have a more balanced overall diet with nutrient and food selection that can fulfil their nutritional recommendations [3-5]. Indeed, daily fruit intake is higher in breakfast eaters with an increased likelihood of meeting the ‘5-a-day’ requirement with all the associated benefits this brings [5-7].
Healthy breakfast eaters usually have better habits throughout the day  and this will result in a positive impact on their overall health. Nevertheless, it has been shown that breakfast consumers have an increased vitamin and mineral intake because of having breakfast which is usually not compensated by any other meal during the rest of the day by breakfast skippers [5,8].
Breakfast and weight control
As opposed to what some people believe,  skipping breakfast is not an effective method for weight control . Some studies have shown that breakfast skippers have a higher body mass index (BMI) and waist circumference than breakfast consumers [ 5,6]. A study run in Spain showed that the risk of abdominal obesity was 1.5 times higher in breakfast skippers compared to breakfast consumers .
Although lot of research still needs to be done, there are several reasons why regular breakfast is related to better body weight control.
First, due to its potential effect in hunger/satiety regulating hormones , breakfast consumption is associated with a low feeling of hunger during the following hours, helping to get to lunch time with less appetite. But not every breakfast would do the trick, as high protein breakfasts are considered to be more satiating than the ones with regular protein content [12,13]. High protein breakfasts have also shown to reduce the sweet and savoury cravings during several hours compared to breakfast skippers , which may help to cut-down on snacking throughout the morning [11,15]. In this sense, a high protein breakfast might help to reduce the caloric intake during lunch  and total daily caloric intake, compared to breakfast skipping .
Secondly, as mentioned above, breakfast is the perfect opportunity to start the day with a healthy and balanced diet which could help to achieve a normal weight.
In addition to this, some studies suggest that having breakfast may increase postprandial energy expenditure . Although more research is suggested, it seems that postprandial energy expenditure is higher in the morning than in the evening. This means that the energy expenditure after a meal (due to the energy costs of nutrient digestion) is higher in the morning 
Finally, regular breakfast consumption has been associated with higher none-structured physical activity, especially during the morning [ 17,18]. This means that, without noticing it, we move more. One of the possible suggested mechanisms for this is that when cutting the night fast, our bodies perceive the availability of energy (the exogenous glucose coming from the breakfast) and increase the energy expenditure through physical activity. In other words, our bodies sense that they don’t need to ‘save’ energy [17,18].
Breakfast and cardio-metabolic health
Breakfast skipping is not only related to weight gain, but also with worse blood glucose control and increased risk of type 2 diabetes. In fact, at the beginning of this year, a study conducted by researchers from the German Diabetes Centre which reviewed different studies published on the matter, including 96,175 participants in total, suggested that skipping breakfast is associated with a 33% higher risk of having type 2 diabetes, which is in part explained by an excess of body weight .
Breakfast and muscle mass
Skipping breakfast has also been shown to be a risk factor for lower muscle mass . Partly because protein intake at breakfast attenuates the overnight fasting protein losses , and partly because breakfast represents a very good opportunity to help to get the daily amount of protein that your body needs. It is well known that adequate protein consumption in combination with physical activity are key pillars for building and maintaining muscle mass. But, when it comes to muscle building support, not only the amount of protein consumption is important but also the quality, timing and distribution of protein during the day. Several studies suggest that around 20g of high-quality protein should be consumed per meal, to better stimulate muscle building, including breakfast occasion [22,23]. In addition to this, it’s also been shown that when protein intake is evenly distributed throughout the day, muscle support is greater than when protein is consumed in a skewed manner . Moreover, the consumption of a high protein breakfast containing between 25-30 g of protein has shown to promote the increased utilisation of dietary protein and stimulate its use by the muscle .
Improved sport performance
Studies suggest that the omission of breakfast prior to exercise might impair subsequent exercise performance in habitual breakfast consumers . But more surprisingly, exercise performance impairment when skipping breakfast has also been evidenced during evening exercise as well . After an overnight fast, our body’s fuel stores are reduced, and breakfast can help to top-up these fuel stores to support exercise performance.
Breakfast, cognitive function and mood
Some studies have suggested that breakfast consumption improves cognitive function and mood [27,28]; but these benefits have been found, in the majority of cases, with a healthy breakfast only [27,29]. Additionally, eating breakfast prior to doing physical activity has a positive impact on mood, on reducing mental fatigue and increasing alertness .Some of the suggested mechanisms through with breakfast can support cognitive function are the improvement of the overall nutritional status, and the modification of blood glucose concentration .
Breakfast consumption in Europe
Despite being regarded as the most important meal of the day, and all the health benefits associated with a regular consumption of a healthy breakfast, this might not be a habit regularly practiced by many. The breakfast habit appears to be less frequent when children enter teenage years, and, in some cases, they go back to it during adulthood . Although it may not be the case for all European countries, there is still a proportion of the adult population missing breakfast every day , with more than 15% of young adults in Spain, and more than 30% of adults in Switzerland not consuming breakfast regularly [31,32].
Sometimes, a hectic life style makes it difficult to spend a lot of time preparing a healthy breakfast. Particularly during working days, breakfast needs to be quick and easy while providing all necessary nutrients to keep up with the intensity of daily activities.
In this sense, below are couple of recommendations that will help to make daily breakfast an easier task :
- Set out dishes, utensils, and non-perishable ready-to-serve foods the night before.
- Prepare hard-cooked eggs the night before so they are ready for a quick ‘to-go’ breakfast.
- Layer fruit, cereal, and low-fat or fat-free yogurt for a fruit parfait to go.
- Keep easily accessible nutrient-dense foods like dry fruit or bars in the car, or in a bag to eat on the way to work.
- Make a grab-and-go healthy smoothie or shake. Make sure you choose protein and vitamin and mineral rich ingredients.
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