The great positive impact of public health programs is widely acknowledged. Due in part to the policies and actions developed through public health, the 20th century registered a decrease in the mortality rates for infants and children and a continual increase in life expectancy in most parts of the world. For example, it is estimated that life expectancy has increased for Americans by thirty years since 1900,[51] and worldwide by six years since 1990.[52]
Professor Alan Boobis OBE, Toxicologist, Division of Medicine, Imperial College London states that "The body’s own detoxification systems are remarkably sophisticated and versatile. They have to be, as the natural environment that we evolved in is hostile. It is remarkable that people are prepared to risk seriously disrupting these systems with unproven ‘detox’ diets, which could well do more harm than good."[11]

Genetics, or inherited traits from parents, also play a role in determining the health status of individuals and populations. This can encompass both the predisposition to certain diseases and health conditions, as well as the habits and behaviors individuals develop through the lifestyle of their families. For example, genetics may play a role in the manner in which people cope with stress, either mental, emotional or physical. For example, obesity is a significant problem in the United States that contributes to bad mental health and causes stress in the lives of great numbers of people.[27] (One difficulty is the issue raised by the debate over the relative strengths of genetics and other factors; interactions between genetics and environment may be of particular importance.)

Sleep is an essential component to maintaining health. In children, sleep is also vital for growth and development. Ongoing sleep deprivation has been linked to an increased risk for some chronic health problems. In addition, sleep deprivation has been shown to correlate with both increased susceptibility to illness and slower recovery times from illness.[43] In one study, people with chronic insufficient sleep, set as six hours of sleep a night or less, were found to be four times more likely to catch a cold compared to those who reported sleeping for seven hours or more a night.[44] Due to the role of sleep in regulating metabolism, insufficient sleep may also play a role in weight gain or, conversely, in impeding weight loss.[45] Additionally, in 2007, the International Agency for Research on Cancer, which is the cancer research agency for the World Health Organization, declared that "shiftwork that involves circadian disruption is probably carcinogenic to humans," speaking to the dangers of long-term nighttime work due to its intrusion on sleep.[46] In 2015, the National Sleep Foundation released updated recommendations for sleep duration requirements based on age and concluded that "Individuals who habitually sleep outside the normal range may be exhibiting signs or symptoms of serious health problems or, if done volitionally, may be compromising their health and well-being."[47]

“Le mouvement One Health (“une seule santé”), initié au début des années 2000, fait suite à la recrudescence et à l'émergence de maladies infectieuses, en raison notamment de la mondialisation des échanges. Le principe [de One Health] est simple : la protection de la santé de l'Homme passe par la santé de l'animal et celle de l'ensemble des écosystèmes”, peut-on lire sur le site de l'Inrae. Alors que nous traversons une période de pandémie mondiale, comme l'explique Philippe Mauguin, PDG de l'Inrae, il est important de rappeler que 60 % des maladies infectieuses humaines proviennent du monde animal : c'est la zoonose. De plus, 70 % de ces maladies nous sont transmises par les animaux sauvages. L'objectif de cet Institut qui a vu le jour en janvier 2020, au travers de One Health, est de démontrer le lien entre la dégradation de la biodiversité et l'émergence de ces nouvelles zoonoses. Pour cela, plusieurs départements et unités de recherche de l'Inrae consacrent leurs études aux facteurs de dégradation et des pressions imposées sur l'ensemble des écosystèmes. “La problématique des conséquences directes et indirectes de différents facteurs de l'environnement sur les santés [...] est un sujet de préoccupation pour l'Inrae”, explique Thierry Caquet, Directeur Scientifique-Environnement de l'Institut.
An important way to maintain your personal health is to have a healthy diet. A healthy diet includes a variety of plant-based and animal-based foods that provide nutrients to your body. Such nutrients give you energy and keep your body running. Nutrients help build and strengthen bones, muscles, and tendons and also regulate body processes (i.e. blood pressure). Water is essential for growth, reproduction and good health. Macronutrients are consumed in relatively large quantities and include proteins, carbohydrates, and fats and fatty acids. Micronutrients – vitamins and minerals – are consumed in relatively smaller quantities, but are essential to body processes.[39] The food guide pyramid is a pyramid-shaped guide of healthy foods divided into sections. Each section shows the recommended intake for each food group (i.e. Protein, Fat, Carbohydrates, and Sugars). Making healthy food choices is important because it can lower your risk of heart disease, developing some types of cancer, and it will contribute to maintaining a healthy weight.[40]
Health science is the branch of science focused on health. There are two main approaches to health science: the study and research of the body and health-related issues to understand how humans (and animals) function, and the application of that knowledge to improve health and to prevent and cure diseases and other physical and mental impairments. The science builds on many sub-fields, including biology, biochemistry, physics, epidemiology, pharmacology, medical sociology. Applied health sciences endeavor to better understand and improve human health through applications in areas such as health education, biomedical engineering, biotechnology and public health.
Making the decision to cleanse your body is great! It shows that you’re taking your health seriously and trying to make positive changes. However, rather than trying cleansing plans, doctors recommend living an overall healthier lifestyle instead. There’s really just no substitute for a healthy diet, regular exercise, lots of sleep, and cutting out harmful habits like smoking and drinking. By making these changes, you can successfully cleanse your body and enjoy the benefits.