Promethease is a great resource to summarize your individual DNA against every study that has been published. The reality is that there have not been enough studies to make things truly viable as a solution.
One year ago I was 1.6x more likely for late onset, today I am 1.8x more likely for late onset because there have been additional studies published.
The way I see it, science has about 20 years to get it figured out before it becomes a real risk for myself. In the mean time, i can certainly enjoy the many physical and mental health benefits of Keto and as needed 21day fast to reset my brain chemistry when needed.
So re-run your DNA through Promethease each year or sooner to see how science is advancing.