From daily habits to nutrition and sleep, explore informational guides on living a healthier life — backed by research and written for real people.
A cold sore shows up right when you least want it. The redness, the swelling, the tiny blister — all of it is hard to hide. You can cover it, but you need to do it the right way. The goal is to make it less visible without making it worse or spreading the virus. … Read more
The vastus lateralis muscle on the outer side of the thigh is the standard and safest site for a self-administered testosterone injection. You give the injection in the middle third of the outer thigh, between the hip and the knee, staying on the outside of the leg away from major blood vessels and nerves. This … Read more
If you have ever felt a sudden, urgent need to use the bathroom shortly after taking a sip of your morning coffee or a glass of water, you are not imagining things. The connection between drinking fluids and bowel movements is a real, physiological response. This happens because the entire digestive tract, from your stomach … Read more
Burning during urination is a signal from your body that something is irritating your urinary tract. The medical term for this symptom is dysuria, and it is one of the most common reasons people see a doctor. The cause is usually a bacterial infection, but it can also come from irritation, injury, or other medical … Read more
Glucagon-like peptide-1, often shortened to GLP-1, is a naturally occurring hormone your body produces in the gut. It is released after you eat and plays a central role in regulating blood sugar and appetite. This single hormone helps signal the pancreas to release insulin, slows down how quickly food leaves your stomach, and communicates with … Read more
If you are checking labels because you have celiac disease or a gluten sensitivity, you have likely seen maltodextrin on an ingredient list and wondered if it is safe. The short answer is yes: maltodextrin is gluten-free. In the United States, maltodextrin is almost always made from corn, rice, or potato starch, not wheat. Even … Read more
Teeth whitening is a cosmetic dental procedure that lightens the color of your teeth and removes stains and discoloration. It works by using peroxide-based bleaching agents that break down the chemical bonds of discolored molecules inside the tooth enamel. The result is a brighter, whiter smile that typically lasts for several months to a few … Read more
Cortisol is a hormone your adrenal glands produce. It is often called the stress hormone, but that name undersells it. Cortisol helps regulate your sleep-wake cycle, blood sugar, blood pressure, and inflammation. Your cortisol levels naturally rise and fall throughout the day. They are highest in the morning to help you wake up and lowest … Read more
Waking up with an erection is a normal part of the male sleep cycle. Most men have several erections during the night, and one is often present when the alarm goes off. But sometimes it feels bigger, harder, or more frequent than usual. This usually points to a change in your body, your sleep, or … Read more
A cavity is permanent damage to your tooth enamel, and once that hard outer layer is broken, your tooth cannot repair itself. The only way to truly remove a cavity that has formed is for a dentist to remove the decayed tissue and restore the tooth, which usually involves drilling. However, there are now non-drilling … Read more