Researchers in China have reversed multiple hallmarks of aging in monkeys, restoring cognition, bone density, and even gene expression patterns using genetically enhanced stem cells. If this holds true, it could mark the beginning of a new era in how we think about midlife.

Not only are women’s symptoms often different from men’s, but they are also not as widely known in many medical circles. Men’s symptoms have long been established as the overarching human “norm.” This results in delayed diagnoses and treatment for women—and an increased mortality rate—because most medical professionals, along with most of the general American population, are not familiar with the way women present disease. We are taught to look out for chest pain, not nausea, concerning a heart attack; we are taught to look out for face droop, not headaches, concerning a stroke.

Perhaps one of the most controversial topics in the world of medicine today is the use of exogenous testosterone as treatment for hormone imbalances, whether in mild cream-based doses or in injectable form. There have been many debates among medical professionals about this topic, and every discussion seems to be very polarized. Should testosterone be considered a steroid or a medication? Does it promote longevity, or does it cause patients to age faster? Is it good for your heart, or does it increase your risk of heart attack? This sort of discourse can leave many wondering: Is testosterone even safe to use?

If you want to truly understand your health status and dramatically improve your chances of living a longer, more energetic life, you need to look beyond conventional medical metrics. Measuring and optimizing your VO2 max could be the single most important step you take for your long-term health.

We reviewed Oura, WHOOP, Apple Watch, Eight Sleep, and Fitbit to find out which truly delivers the data that matters. Whether you're tracking HRV, temperature, or sleep latency, your perfect fit depends on your goals and lifestyle. Explore the breakdown →

While your hormone levels, metabolic processes, and gut health are always good to keep in mind in relation to your sleep, every body is unique, and certain stimuli or meal times that negatively impact one person may not be a problem at all for someone else. Some people may also experience “orthosomnia”—anxiety from trying too hard to optimize sleep—from all of these do’s and don’ts, which paradoxically worsens sleep quality.

The University of Warwick and Fudan University in China conducted a study in which researchers analyzed blood samples from more than 50,000 healthy people, 1,400 of whom went on to develop dementia over a follow-up period of 10-15 years. The researchers used the data they collected to identify 11 blood proteins that can be used as indicators for the biological changes that happen in people who will likely have dementia. According to this study’s findings, these 11 blood proteins predict dementia with an accuracy rate of up to 90%.

The University of Warwick and Fudan University in China conducted a study in which researchers analyzed blood samples from more than 50,000 healthy people, 1,400 of whom went on to develop dementia over a follow-up period of 10-15 years. The researchers used the data they collected to identify 11 blood proteins that can be used as indicators for the biological changes that happen in people who will likely have dementia. According to this study’s findings, these 11 blood proteins predict dementia with an accuracy rate of up to 90%.

The biggest health issue in the world is not obesity, chronic disease, or mental health.

It's the fact that almost nobody is operating at 100% of their capacity.