A massively parallel reporter assay (MPRA) is a laboratory technique used to test thousands of genetic sequences at once to see how they control gene activity. It works by attaching a unique barcode to each DNA sequence, inserting them into cells, and then measuring which barcodes produce RNA. This lets researchers link specific genetic variations … Read more
Cortisol is a steroid hormone your adrenal glands produce. It is often called the stress hormone, but that name only tells part of the story. Cortisol helps regulate your sleep-wake cycle, blood sugar, blood pressure, and inflammation. It is essential for life. Without it, your body could not respond to stress or recover from daily … Read more
Long-range PCR is a laboratory technique used to amplify DNA segments that are much longer than what standard PCR can handle. Standard PCR reliably copies pieces of DNA up to about 1,000 to 2,000 base pairs. Long-range PCR pushes that limit to 10,000, 20,000, or even 30,000 base pairs in a single reaction. This matters … Read more
Low vitamin B12 is rarely a single-cause problem. Most often, it develops slowly over months or years when your body cannot absorb the vitamin from food, when your diet does not provide enough of it, or when a medical condition destroys the cells that carry it. The most common cause is a stomach condition called … Read more
Photographing bioluminescence is about capturing light that living organisms create themselves. You need a camera that allows manual control, a tripod, and patience. Set a wide aperture, a high ISO, and a shutter speed that matches your subject’s movement. The real skill is learning to see in the dark and letting your eyes adjust before … Read more
An electrocardiogram — commonly called an ECG or EKG — records the electrical activity of your heart. It is a quick, painless, and safe test that helps doctors see how fast your heart is beating, whether the rhythm is steady or irregular, and if there are signs of damage or strain on the heart muscle. … Read more
Mental health challenges among students are far more common than many people realize. Current data indicates that roughly 1 in 5 students between the ages of 13 and 18 experience a mental health disorder in any given year. Among college students, that number is similar, with about one-third reporting significant symptoms of anxiety or depression … Read more
Acne prone skin is skin that breaks out regularly, not just once in a while. You likely have it if you get new pimples most weeks, if breakouts appear in the same areas repeatedly, or if your skin stays oily and congested no matter what you do. The clearest sign is a history of recurring … Read more
Listeria infection during pregnancy is rare, but it is far more serious than most other foodborne illnesses. The Centers for Disease Control and Prevention estimates that pregnant women are about 10 times more likely to get a listeria infection than the general population. While the absolute risk remains low — roughly 1 in 6,000 to … Read more
Donating blood is one of the most straightforward things a healthy adult can do to help others, but there are strict rules about who can donate. The minimum weight requirement exists for your safety, not to exclude people. In the United States, you must weigh at least 110 pounds (50 kilograms) to donate whole blood. … Read more