are you sure it is not just the vaccine??? at this point I have seen them point to everything under the sun to not blame the vaccine for the heart attacks. I have even seen articles from the MSM claiming that climate change is responsible for the heart attacks of the ppl who took the vax.
Lots of lifestyle and diet issues causing problems out there. Considering byproducts with no nutritional value to be "healthy" alternatives is one of them. Keto generally where you lose weight by giving yourself a metabolic disorder that puts your systems under duress and can complicate other issues you have is another.
I have a friend who had a heart attack at 32 well before covid. Know many high school and college athletes who went to ER thinking they were having a heart attack because they took too much pre workout or hit their weed pen too much before practice. Vax just exacerbates the issue.