The Concept and Importance of a Healthy Lifestyle
Among the many factors that affect overall health and disease resistance, lifestyle is considered the most controllable and at the same time the most influential.
Non-communicable diseases account for more than 60% of deaths worldwide. As a result, the continuous rise in chronic illnesses has become one of the biggest global health challenges. In most industrialized countries, chronic diseases are the leading cause of poor health, disability, and premature death, and they also consume a large portion of healthcare system expenses, according to PubMed Central.
A healthy diet, regular moderate exercise, and sufficient quality sleep form the foundation of a healthy lifestyle. Healthy food choices and consistent physical activity can significantly delay or prevent chronic diseases. Sleep is also a crucial factor for maintaining health, but it is often neglected in modern societies, as sleep duration continues to decline while sleep disorders increase.
Long-term healthy habits can prevent or effectively manage chronic diseases. Timing also plays an important role, even though it is often overlooked in studies of diet, sleep, and exercise. Considering timing in lifestyle interventions may provide additional health benefits and improve adherence.
Recent studies highlight the role of behavioral rhythms and their impact on metabolic disorders and cancer. As cancer develops, most cancer cells adopt specific metabolic patterns, making them highly sensitive to changes in nutrient supply and overall metabolic state. For example, the risk of colorectal cancer is significantly influenced by dietary patterns and gut microbiome composition.
A healthy diet rich in vegetables, fruits, and dairy products has been shown to reduce the risk of colorectal cancer in individuals with certain gut microbiome types by about 34% (adjusted odds ratio of 0.66). Diet composition and microbiome regulation also affect metabolic diseases such as MASLD (Metabolic Dysfunction-Associated Steatotic Liver Disease), previously known as NAFLD. Lifestyle modifications remain the most effective treatment for MASLD and its complications, including MASH and liver fibrosis.
Diet and Proper Nutrition
A healthy diet is essential for proper nutrition and overall health. It protects against many non-communicable chronic diseases such as heart disease, diabetes, and cancer. A healthy diet includes a variety of foods while reducing salt, sugar, and saturated or trans fats, according to the World Health Organization.
A balanced diet includes:
Staple foods such as wheat, barley, corn, or rice
Starchy roots like potatoes and taro
Legumes such as lentils and beans
Fruits and vegetables
Animal-based foods such as meat, fish, eggs, and milk
According to WHO recommendations, healthy eating should begin early in life. Breastfeeding supports healthy growth and may reduce the risk of obesity and chronic diseases later in life. Exclusive breastfeeding is recommended for the first six months, followed by the introduction of safe and nutritious complementary foods while continuing breastfeeding up to two years or more.
Eating plenty of fruits and vegetables provides essential vitamins, minerals, fiber, plant proteins, and antioxidants. People who consume a diet rich in fruits and vegetables have a lower risk of obesity, heart disease, stroke, diabetes, and certain cancers.
Fat intake should be limited, as fats are highly concentrated sources of energy. Excess consumption of unhealthy fats—such as saturated and industrial trans fats—increases the risk of heart disease and stroke. Healthier options include unsaturated vegetable oils such as olive oil, soybean oil, sunflower oil, and corn oil.
Total fat intake should not exceed 30% of daily energy intake.
Sugar intake should also be limited to less than 10% of total energy, with additional health benefits when reduced below 5%. Choosing fresh fruits instead of sugary snacks and reducing intake of soft drinks and sweetened beverages helps lower sugar consumption.
Salt intake should be kept below 5 grams per day to help prevent high blood pressure and reduce the risk of cardiovascular diseases and stroke. Reducing salt and sodium-rich seasonings such as soy sauce and fish sauce during cooking also contributes to better health.
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