You might get some good information from the guy who developed the Vitamin K2 I'm taking: http://www.k-vitamins.com/index.php?page=My_Story
I've corresponded with him over the past few years. His coronay calcium score went over 1400 before he turned it around. He says thyroid getting T3 up between 4-6 was critical in his case. My T3 hasn't been that high for several years, but it did jump up there when I first started taking Iodoral some years ago. I can't figure out why it dropped back to current levels.
I wrote the top post of this thread: go back to page 1 of this thread: "vitamin C, iodine, vegetarian diet", which will answer some of your questions.
I started taking vitamin C in large doses circa 1980 because I read Pauling's book Vitamin C and the Common Cold and the Flu. I was getting sick several times per year, and the large doses of ascorbic acid solved the problem.
It was about 5 years ago I started having a-fib. I found that magnesium supplementation helped a lot, reduced a-fib to an occasional episode, but then I was already been taking iodine in lower dosage. Look at my top post for the details, but I quit taking iodine in January 2018 after Dr. Davis told me I was likely getting a toxic dose.
Big mistake! My a-fib came back worse than ever, 3-4 times per week for 8-20 hours per episode. When I realized iodine deficiency was probably the reason, I started iodine again at increasing dosage in March 2018. Now I'm taking 50 mg or more per day. I have not had a-fib for 2 and 1/2 months.
I also take testosterone and progesterone as recommended by this doc: https://www.progesterall.com/product47.html
My erections are fine, not what they were when I was 35, but I'm 69 and going strong. :0)
My testosterone is upper range for my age with the prescription bioidentical testosterone. Important to get bioidentical!