I discovered Vessel Health while looking for a way to monitor my cortisol levels. As with many of these things, I was skeptical at first, but still very eager to give it a try. I contemplated signing up for months. Eventually, I got a discount for a month's supply of test cards. I already had blood work scheduled, so I purchased a Thorne Stress test and decided to compare all three. This gave me the perfect opportunity to try it out and see how accurate it was. What is it? The portion of the ...