http://list25.com/25-amazing-facts-about-your-heart-that-are-hard-to-beat/?view=all

What is cholesterol? - https://www.zmescience.com/science/what-is-cholesterol/

A recent study found a strong correlation between how a person performed on a cardiac stress test and their risk of dying from cancer. Here’s what you need to know. - https://www.nationalgeographic.com/premium/article/stress-test-cardiac-cancer-exercise

Believe the Food Hype: 10 Ways to Protect Your Heart - https://www.webmd.com/heart/ss/cm/food-10-ways-to-protect-your-heart