According to projections by the World Health Organization (WHO), between 2000 and 2050, the proportion of the world's population over 60 years old will double from about 11 % to 22%. In the same period, the number of people aged 80 or older will have almost quadrupled to 395 million.
By 2017, the number of adults aged 65 and above will outnumber children under the age of 5; this is unprecedented in human history. By 2050, these older adults will outnumber children under the age of 14. Scientists have found that human beings can expect to live a full and meaningful life to 120 years old. Not only that, but according to research, it is not impossible for humans to live to 150 years old through proper care and eating a complete and nutritious diet.
Nonetheless, maintaining a healthy and strong body requires effort, more so as a person ages. Therefore, consuming foods that can defend against diseases becomes of utmost importance. Guiding the elderly to consistently consume more wholesome plant foods can help them to maintain good health.In this regard, Nutritional Immunology is a longevity science that has become increasingly pivotal for human beings to achieve a healthier and longer life.
Nutrition plays an important role in the fighting of infections-an absence of any one nutrient will have unfavorable effects on the immune system. However, Nutritional Immunology does not focus on the need for basic nutrients like proteins, minerals, and vitamins. Rather, it focuses on nutrients like phytochemicals, antioxidants, and polysaccharides. Although a deficiency in proteins, minerals, and vitamins will lead to a malfunctioning immune system, most people do not lack these nutrients in this day and age.
The nutrients we usually lack are those that are especially beneficial to the functioning of the immune system, like phytochemicals, antioxidants, and polysaccharides. Therefore, exploring ways to obtain these nutrients that help keep the immune system in optimal condition is the crux of health topic discussions.