Nutritional intake: Nutritional imbalance is the root of many diseases, and the nutrients that men over 40 need most.

Many people have a habit of being picky eaters, and some middle-aged men are no exception. They eat their favorite foods without any restraint and ignore those they don't like. These two extreme eating habits prevent the body from getting balanced nutrition, resulting in nutritional imbalance, which is the root cause of persistent diseases.

Nutritional imbalance can have serious effects on our health:

(1) Lack of glucose

Every human function, including thinking, muscle contraction, and even breathing and heartbeat, relies on the energy produced by glucose metabolism. Under normal circumstances, the glucose level in the blood is maintained at a relatively stable concentration.

Glucose comes from carbohydrates in food. Whenever blood glucose levels rise after a meal, insulin causes glucose to be transferred into cells for storage. When blood glucose levels drop, glucagon draws glucose out of cells as an emergency measure.

If the body doesn't absorb enough glucose to keep up with its energy expenditure, the most serious consequence is "cutting flesh to satisfy hunger," using protein from the muscles as fuel. As a result, not only is fat lost, but the muscle groups built up over a long period of time are also greatly weakened.

(2) Lack of protein

Think carefully about every tiny part of your body; from cells to organs, proteins are present. A lack of protein in the diet can affect processes such as human growth, cell differentiation, damage repair, immune responses, and hormonal regulation. Take the immune response as an example: if malnutrition leads to weakened immune function, patients often exhibit poor resistance, making them vulnerable to attacks from bacteria, viruses, and cancerous cells.

(3) Lack of trace elements

Vitamins, iron, calcium, iodine, and many other nutrients, though required in small amounts, are indispensable. Iron deficiency prevents the body from synthesizing enough hemoglobin, leading to anemia and causing organ tissues to suffocate due to lack of oxygen. Calcium deficiency forces the body to break down bones, significantly reducing bone density and increasing the risk of osteoporosis.

Entering middle age, men shoulder heavy responsibilities, facing significant work pressure, a fast-paced work environment, and substantial family burdens, resulting in tight schedules. Physiologically, middle-aged men are at the peak of their physiological functions but also enter a transitional period into aging, undergoing a significant transformation from peak to decline. Compared to youth, middle-aged men experience a gradual decrease in basal metabolic rate with age, a reduction in muscle mass and other physical tissues, and an increase in adipose tissue. Digestive and circulatory system functions gradually decline, leading to digestive system diseases such as chronic gastroenteritis and ulcers. The body's ability to fight free radicals also weakens, and the walls of the cardiovascular system gradually lose elasticity, increasing susceptibility to cardiovascular diseases and tumors. After age 40, vision, hearing, sensation, and smell also begin to decline, and mood becomes unstable.

It is particularly important to emphasize that in late middle age, both cellular and humoral immunity begin to decline. Antibody production decreases, and various antibodies decline with age; the body produces mutated proteins, which the immune system recognizes as foreign proteins and produces antibodies, resulting in antigen-antibody complexes in the blood; cellular immune function also weakens, with the phagocytic function of macrophages beginning to decline; and the immune surveillance system's ability to monitor cells with cancerous mutations weakens.

However, proper nutrition during middle age is crucial for combating aging and extending lifespan. The nutritional requirements for middle-aged men are as follows:

(1) Heat

As people age, they should appropriately reduce their calorie intake. Reduce it by 5% when they are 40 to 50 years old and by 10% when they are 50 to 59 years old, in order to maintain a standard weight. Overweight people should pay attention to controlling their calorie intake and increasing their physical activity to burn off excess calories and reduce fat accumulation.

(2) Protein

While ensuring adequate protein intake, it's crucial to choose high-quality protein sources. Although middle-aged men require less protein than younger men, their physiological functions gradually decline, making this a period with the greatest risk of disease. With age, the body's utilization rate of dietary protein decreases to about 60% of that in youth, while protein breakdown is more efficient. Therefore, middle-aged men should ensure a rich, high-quality protein intake in greater quantities.

(3) Fat

Middle-aged men experience a gradual decrease in the amount of enzymes and bile acids responsible for fat metabolism, leading to a decline in their ability to digest, absorb, and break down fats. Furthermore, excessive fat intake can easily lead to obesity. Therefore, it is necessary to appropriately control fat intake.

(4) Carbohydrates

The main source of energy for the human body is carbohydrates in grains, such as rice, noodles, and root vegetables. Therefore, as long as the staple food meets the body's needs, eating more vegetables and fruits to provide the body with the necessary fiber is sufficient.

(5) Vitamins

Vitamins A, C, D, and E are all essential for human metabolism. Middle-aged men's digestive and absorptive functions begin to decline, resulting in lower utilization of various vitamins. This can lead to various vitamin deficiency symptoms such as bleeding, slow wound healing, blurred vision, ulcers, wrinkles, and premature aging. Therefore, an adequate daily supply of vitamins is crucial.

(6) Trace elements

Zinc, copper, selenium, and other trace elements are essential for human physiological activities and participate in the metabolism of enzymes and other active substances in the body. Middle-aged men are prone to relative deficiencies in certain trace elements, so they should increase their intake of foods rich in trace elements.

(7) Water

Water is a substance involved in all metabolic activities in the human body, so we should drink plenty of water every day to help eliminate metabolic waste products and prevent diseases.

Health Class

Some people can chew very hot food without any fear. This habit is very bad, because hot food can cause congestion of the oral mucosa, easily leading to ulcers, and can also damage the protective function of the mucosa in the mouth. Hot food is also harmful to the gums and teeth, easily causing gum ulceration and sensitive teeth. Hot food can also damage the esophageal mucosa, stimulating mucosal hyperplasia, leaving scars and inflammation, which can induce cancer in the long run. In addition, frequently eating excessively hot food can damage the taste buds on the tongue, affecting a person's taste nerves and gradually reducing their appetite.