Eggs in the Diet – Pros and Cons

Eggs are a highly nutritious food product. The nutrient content varies depending on several factors, including the diet of the hens, their age, and origin. Different bird species, such as chickens, ducks, quails, or pheasants, produce eggs with distinct nutritional profiles. Environmental conditions also play a significant role. An average egg weighs approximately 60 g and provides 143 kcal, 12.6 g of protein, 9.5 g of fat, and 0.7 g of carbohydrates per 100 g. Egg proteins feature an ideal balance of essential and non-essential amino acids, making them high-quality proteins. They contain crucial amino acids like arginine, lysine, and isoleucine, and are highly digestible. Eggs supply saturated, monounsaturated, and polyunsaturated fatty acids in balanced proportions. They are rich in fat-soluble vitamins (A, D, E, and to a lesser extent K) as well as B vitamins. Additionally, they contain magnesium, iron, calcium, phosphorus, zinc, selenium, and other minerals. The yellow color of the yolk is due to carotenoids such as zeaxanthin and lutein. Eggs also contain a significant amount of dietary cholesterol – up to 372 mg per 100 g.

Eggs are a staple in Polish cuisine, used in various culinary forms. They are most commonly consumed for breakfast as scrambled eggs, omelets, hard-boiled eggs, or modern poached eggs. Additionally, egg pastes with ingredients like chives, cottage cheese, or avocado are popular. From a health perspective, eggs cooked with minimal fat are the most recommended, especially soft-boiled eggs, which are easier to digest, such as for individuals with digestive disorders. Eggs also serve as a leavening agent in baked goods, pancakes, and blini, while the yolk acts as an emulsifier in sauces or mayonnaise.

The nutritional value of eggs and their impact on health depend on various factors, including the individual's health status, physical activity levels, and current dietary habits. It is essential to maintain a balanced diet and incorporate plant-based foods. What scientific evidence supports the regular consumption of eggs? Research suggests that moderate egg intake may positively influence metabolism, cardiovascular health, and overall well-being.

For eggs to have a negative impact on health, their consumption must be excessive. Other factors must be considered, not just the intake of this single product. Key aspects include: – the current dietary pattern, including the content of saturated fatty acids, trans fats, simple sugars, artificial additives, and highly processed foods, – the amount of fluids consumed daily, – the distribution and number of meals per day, – the frequency and intensity of physical activity, – the quality of sleep and recovery, – stress management techniques. What do scientific studies reveal? – Daily dietary cholesterol intake should not exceed 300 mg, and 200 mg for individuals with lipid disorders. One egg contains approximately 200 mg of cholesterol, necessitating restriction (Łukaszewski, Kręgielska-Narożna 2018). – Egg consumption may increase the susceptibility of LDL cholesterol to oxidation, potentially impairing endothelial function and leading to arterial inflammation (Blesso, Fernandez 2018). – Eggs can exacerbate postprandial lipemia and amplify the adverse effects of saturated fatty acids (Fielding 1995). – Egg consumption may lead to the production of trimethylamine N-oxide (TMAO), generated by specific gut bacteria. TMAO may indirectly contribute to cardiovascular diseases such as heart attack or stroke. The relationship between egg intake and TMAO levels in blood requires further investigation (Miller 2014). – In individuals with type 2 diabetes and/or impaired glucose tolerance, excessive egg consumption is linked to increased stroke risk and higher fasting glucose levels. Restricting eggs in the diet is recommended for diabetics and those at risk, such as overweight individuals, those with prediabetes, or metabolic syndrome (Sugano, Matsuoka 2021).

Eggs are a product that sparks considerable debate. While most people appreciate their taste, their health implications are a subject of contention, with both advocates and critics. A balanced diet can accommodate all foods, but attention must be paid to quantity and quality. When it comes to eggs, the manner of consumption is crucial. From a health perspective, boiled eggs (no more than 10 minutes to preserve nutritional value) or steamed eggs are preferable to those fried in excessive fat. Pairing them with vegetables is advisable—for instance, an omelette with spinach instead of fatty processed meats. Healthy individuals without cardiovascular risk factors can consume several eggs per week, ideally up to seven (one per day). However, this quantity depends on overall dietary habits and the presence of other cholesterol sources, such as organ meats, butter, or full-fat dairy products. For individuals with diabetes or impaired glucose tolerance, stricter limitations are necessary. Those at risk of diabetes (e.g., overweight, metabolic syndrome) should also moderate their intake. Depending on needs, eggs can be substituted with various alternatives. For baking, breading, or omelettes, potato, corn, or tapioca starch can be used, while tofu works well for scrambled eggs and mashed ripe bananas for cakes. Binding agents like flaxseeds, chia seeds, or nut butter can replace eggs, and agar is a suitable gelling substitute. In some dishes, egg replacements are unnecessary, allowing them to be omitted entirely.