Q. How important is heredity in our health?

Many of the causes of our illnesses are inherited from our ancestors.

Almost one-third of known diseases have genetic links. These include colon cancer, heart disease, alcoholism and high blood pressure.

A medical genealogy or medical family tree can reveal patterns. If you have prepared a medical genealogy and found that a disease seems to run in your family, you might want to consider genetic testing. This form of testing can help you plan.

DNA, or deoxyribonucleic acid, is in the genes you get from your parents. DNA guides the cells in your body. If your DNA contains a mutation, you could develop a medical condition.

A test can reveal mutations that raise the risk of developing a disease.

Positive results for certain diseases can induce people to take preventive action, such as surgical removal of endangered organs.

Approximately 75,000 genetic tests are on the market and on average 10 more are added each day, according to an analysis published May 7 in “Health Affairs.”

Testing usually requires a blood sample, but may require hair, skin or other tissue samples, such as cells from the inside of your cheek.

Genetic testing should be viewed as a fallible tool. A positive result for a mutation doesn’t mean you’ll get a disease. And a negative result doesn’t mean you are immune.

Multiple mutations can cause a disease. Multiple genes can be responsible for a single disease. There are gene changes that develop without any link to your ancestors; they happen because you smoke or get too much sun or sometimes for no known reason.

If you decide to try genetic testing, remember that what you learn about yourself could be reassuring, but it could also be upsetting.

Genetic testing is a subject to discuss first with your personal physician.

You may be referred to a medical-genetics specialist, who is trained to interpret the results of tests.

To find genetics professionals in your area, contact the National Society of Genetic Counselors at www.nsgc.org or the American Society of Human Genetics at www.ashg.org.

To find more information about the medical conditions present in your family and about support groups, contact the Genetic Alliance at;

https://geneticalliance.org/

You may also want to consult a lawyer to protect your interests. Results of genetic tests are usually kept in your medical records.

The Genetic Information Nondiscrimination Act (GINA) is a federal law that prohibits discrimination in health coverage and employment based on genetic information.

Have a question? Email: fred@healthygeezer.com. Order “How To Be A Healthy Geezer,” 218-page compilation of columns: healthygeezer.com

All Rights Reserved &Copy; 2023 Fred Cicetti

The Times News, Inc. and affiliates (Lehigh Valley Press) do not endorse or recommend any medical products, processes, or services or provide medical advice. The views of the columnist and column do not necessarily state or reflect those of the Lehigh Valley Press. The article content is not intended as a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician, or other qualified health-care provider, with any questions you may have regarding a medical condition.