There was a genetic component to Elvis health issues and his mothers.
Interesting, never heard that until now. I found this:
He appeared to suffer symptoms of the condition in his final years, including an irregular heartbeat, fatigue, fainting and high blood pressure. ......The new findings suggest that regardless of his diet, the iconic singer was always destined to die young.
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https://www.mirror.co.uk/tv/tv-news/elvis-death-shocking-new-dna-3280460