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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.

No matter what your health care goals or what wellness products you’re looking for, we’ll make the shopping process easy and convenient. Our Customer Service Representatives are ready to help you find just what you need, via telephone, mail, fax, email or even online live chat. When you’re ready to order, use our catalog quick shop or search DrLeonards.com to find products to meet your individual needs. You can also choose to shop from our Virtual Catalog to bring the catalog shopping experience to your computer, page by page. No matter how you prefer to shop Dr. Leonard’s, your satisfaction is our top priority. If for any reason you are not 100% satisfied with any product you purchase from us, you may return it for a prompt refund.
Just as there was a shift from viewing disease as a state to thinking of it as a process, the same shift happened in definitions of health. Again, the WHO played a leading role when it fostered the development of the health promotion movement in the 1980s. This brought in a new conception of health, not as a state, but in dynamic terms of resiliency, in other words, as "a resource for living". 1984 WHO revised the definition of health defined it as "the extent to which an individual or group is able to realize aspirations and satisfy needs and to change or cope with the environment. Health is a resource for everyday life, not the objective of living; it is a positive concept, emphasizing social and personal resources, as well as physical capacities".[10] Thus, health referred to the ability to maintain homeostasis and recover from insults. Mental, intellectual, emotional and social health referred to a person's ability to handle stress, to acquire skills, to maintain relationships, all of which form resources for resiliency and independent living.[9] This opens up many possibilities for health to be taught, strengthened and learned.
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