A mitochondrial peptide that mimics exercise? The data are surprising. I went down the rabbit hole—and now I’m testing it ...

Learn about econometrics, including how it uses statistical models and data analysis to test economic theories, forecast ...

Experts think certain non-routine tests are worth asking your doctor about, since the results could point to health-saving ...

The idea is straightforward: Take a blood test now, even without symptoms, and learn if you could some day develop Alzheimer’s disease. Subscribe to read this story ad-free Get unlimited access to ...

Scientists have long known that the immune system plays a key role in aging. As people age, they have weaker responses to ...

TB tests use phlegm — not the easiest thing to get or work with. It takes time for results. And there can be false negatives and positives. A new test is more accurate and takes less than half an hour ...

Urine tests can detect alcohol or alcohol metabolites for 12 to 24 hours after drinking, though advanced tests may detect metabolites up to 80 hours after heavy use. Ethyl glucuronide (EtG) and ethyl ...

You mentioned in a recent column that prospective randomized controlled trials (RCTs) are a powerful type of study. Can you ...

Scientists have long known that the immune system plays a key role in aging. As people age, they have weaker responses to ...

Identification of microbes joins together the discipline of microbiology with the study of infectious diseases. Methods of reliable and accurate microbial identification are valuable to a wide range ...

This product goes further than others that only tests iron levels. By measuring ferritin levels, it looks at the amount of overall iron storage and whether a person has normal iron levels. This test ...

The famed efficient market hypothesis, or EMH, is widely accepted by academics and modern investors. The hypothesis states that stock prices reflect all available information at any given time, making ...