I, with little evidence, have made a diet choice to support health of the cardiovascular system and hopefully reduce the probability of a stroke. My support is the evidence in Ray Peat's comments on gelatin. Ray Peat knows that gelatin is anti-inflammatory. The anti-inflammatory effect might help.
The anti-inflammatory effect was strong for me. My sleep was sound(undisturbed by little pains), and my arthritis in the lower back didn't manifest when I awoke.
During the first three of the 5 months I have taken NOW gelatin at 20 grams a day, I had deep sleep, a dreamless sleep, sleeping 8 hours before BPH woke me, then sleeping 2 hours more. After 5 months, I may have one or two nights a week when I can remember a dream
My first goal was to rebuild my left meniscus using gelatin. People have found that growth hormone is increased when gelatin is added to the diet so it is possible that the meniscus can improve. I think because my right leg is shorter, the VMO muscle on the left leg atrophied. With an atrophied VMO maybe the meniscus was stressed by it's lateral movement causing knee cap displacement doing squats. When the VMO is much stronger I will risk doing squats again, to verify that I am 100%. Walking is no problem I do 3 -4 1/2 mile walks a week with an even stride provided by 3/8" extra on my boot sole.. No pain, except for shin splints when I started.
Gelatin used to be a large part of our diets. Nothing was thrown away in the past, but now bones, skin, and organs are greatly reduced in our diets. So, I believe my diet is improved by taking gelatin. I have increased the amount of gelatin, and hopefully my blood vessels will be also a bit more elastic and strong like I think my ligaments and joints are now.
(check out controlling homocysteine with supplements - if a doctor thinks it would help)