Mental health is more difficult to define than physical health because many psychological diagnoses depend on an individual's perception of their experience. According to the International Journal of Environmental Research and Public Health, this diet can help protect a person's heart and reduce the risk of several diseases, such as type 2 diabetes, cancer and diseases that cause brain and nerve damage. Maintaining strong social relationships, volunteering and other social activities have been linked to positive mental health and also to increased longevity. All types of health are related, and people should aim for general well-being and balance as keys to good health.
Since the late 1970s, the federal Healthy People programme has been a visible component of the US approach to improving population health. The study indicated that people who ate a healthy diet were more likely to consume high levels of fruits, vegetables and olives than people who regularly ate fast food. According to the National Institute of Mental Health, people who smoke tobacco, drink alcohol or use illicit drugs to manage stressful situations are more likely to develop health problems than those who manage stress through a healthy diet, relaxation techniques and exercise. In addition to safety risks, many jobs also present risks of illness, disease and other long-term health problems.
This has brought about a new understanding of health, not as a state, but in dynamic terms of resilience, i.e. as a resource for living. A healthy diet includes a variety of plant and animal foods that provide nutrients to the body. Progress has been limited on many objectives, raising doubts about the effectiveness of Healthy People in shaping outcomes in the context of a decentralised and uncoordinated US health system.
In line with the biomedical perspective, early definitions of health focused on the issue of the body's ability to function; health was seen as a state of normal functioning that could be altered from time to time by illness. In these societies, health care is available to those who can afford it or have self-insured (directly or as part of an employment contract) or may be covered by government- or tribal-funded care directly. Modern health care also depends on information, which in many health care settings is still provided in the form of paper records, but is now increasingly done electronically. Some of the factors affecting health are due to individual choices, such as the adoption of high-risk behaviour, while others are due to structural causes, such as whether society is organised in ways that make it easier or more difficult to obtain necessary health services.
Workplace wellness programmes are increasingly adopted by companies for their value in improving the health and well-being of their employees, as are school health services to improve the health and well-being of children.