One way is to have your DNA analyzed. My wife and I recently ran our DNA with Ancestry.com (other options are 23andme.com or familytreedna.com but check to ensure they provide the raw DNA to you), then we uploaded our raw DNA data to Promethease.com to learn our inherited risks. We already knew some of our weaknesses because of our knowledge of family members and ancestors' health problems.
We learned other inherited risks from the comprehensive analysis done by the inexpensive Promethease https://promethease.com/ analysis. I consider it a very valuable insight. The Promethease report identifies thousands of health areas and reports if your risk, based on your DNA profile, is greater or less than average. It also lists specific medication concerns for your body type based on medical studies. Because we turn to plants for our medicine rather than pharmacy medication we didn't pay as much attention to this part of the database but rather focused on what the system weaknesses are. When we know our weak systems we can use targeted herbs to rebuild the systems of the body that were identified as inherently weak.
Disclaimer: I am not affiliated with the Dr. Christopher Corporation. The conclusions I am sharing are from my own experience. This information is for education only and makes no claims of medical advice.