Genetic Testing, Not Consumer Grade

I understand the inherited risks with 23andme and the like. My wife had genetic testing done at her doctors office and found out she carries a gene relating to dementia. One of our children is in cancer treatment now, and we learned that a cousin has a generic marker for breast cancer.

Is genetic testing at a legit medical practice/hospital system any safer than consumer kits? I'm really curious to know if I have any markers for disease, but I'm …

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