Reaching the age of 100 used to be quite a rare achievement. Yet, nowadays, it seems to be a rather commonplace occurrence.

Well, believe it or not, centenarians are not the fastest-growing demographic age group worldwide. Researchers in Sweden followed tens of thousands of people and analyzed routine blood tests taken years earlier. They then posed a question regarding the potential link between blood type and longevity.

Do common lab markers hint at who reaches 100 years of age? The study revealed some of those common biomarkers, including glucose and cholesterol levels, in individuals who live past 90. The work has been published in a respected journal and made use of linked national registers; therefore, it draws on strong data. In this article, we will walk through what they measured and how they analyzed it.