As I understand it, when you have a large difference between systolic and diastolic, it is an indication of hardening of the arteries.
I do not remember why I started mega doses of vitamin C, but it has corrected a couple of problems. A year ago, my spread between systolic and diastolic was typically 75 with a bp 155/80. I just took it a few minutes ago, and it is 143/84, a spread of 59.
I have not taken any meds of any kind for decades. I am 68 yo. male. I started out aiming for 200 grams of vitamin C per day spread out through each day. Now it seems hard to remember, so I end up with about 30 grams a day.
I take 6 grams at a time and try to do it each hour. I try to quit by 4 pm so I can sleep without so much gas.
Another problem that was helped was blood in the semen. It cured it. Makes sense. Vitamin C helps the body to produce collagen, and collagen strengthens the blood vessels. I use ascorbic acid and make my own capsules. At times I will put a spoonful in a glass of water with some honey. The cheapest vitamin C I have found is from Vitacost. Every once in a while, it goes on sale BOGO half off.
Heart disease, google 1989 nobel prize in medicine dr linus pauling, heart disease is a very bad vit c deficiency.