From daily habits to nutrition and sleep, explore informational guides on living a healthier life — backed by research and written for real people.
Every electrical device in your home and every cell tower in your neighborhood emits electromagnetic fields (EMFs). These are invisible areas of energy produced by anything that uses electricity. The key difference between sources is the type of EMF they produce and how strong that field is at the distance you normally stand from it. … Read more
RNA is one of the most important molecules in your body. It carries instructions from your DNA, builds proteins, and regulates how genes are expressed. But before there was DNA, before there were cells, and before there was life as we know it, there had to be something simpler. Many scientists believe that something was … Read more
Cold sores are caused by the herpes simplex virus, most commonly type 1 (HSV-1). The virus spreads through direct skin-to-skin contact, often through a kiss or by sharing items like lip balm or utensils. Once you have the virus, it stays in your body for life and can reactivate, producing a new cold sore when … Read more
If you have noticed that one leg is larger than the other, you are not imagining it. Leg size differences are common, and they range from a fraction of an inch to several inches. The cause depends on whether the difference is in length, in circumference (muscle or fat), or both. In many cases, the … Read more
New parents often worry about their baby’s tiny fingernails. They grow fast and can be surprisingly sharp. A baby can scratch their face or yours without meaning to. Cleaning under those tiny nails is a normal part of baby care, but it needs a gentle touch. The safest method is to trim the nails short … Read more
A basophil is a type of white blood cell that plays a role in your body’s immune system, particularly in allergic reactions and inflammation. They are the least common white blood cell, making up less than 1% of your total white blood cell count. When your body detects a threat like an allergen or parasite, … Read more
Aluminum is the active ingredient that makes most antiperspirants work, and the question of whether it is bad for you comes up often. The short answer is that the scientific evidence does not currently show that aluminum in deodorant or antiperspirant causes breast cancer or Alzheimer’s disease. Major health organizations have reviewed the research and … Read more
Thick saliva is usually a temporary nuisance caused by dehydration, mouth breathing, or dry indoor air. But it can also signal an underlying condition like acid reflux, a side effect of medication, or an issue with your salivary glands. Treatment depends on the cause, but simple steps like drinking more water, chewing sugar-free gum, and … Read more
The COVID-19 pandemic did more than change our daily routines. It changed how our bodies handle stress. For many people, that stress showed up in a very specific place: the jaw. The connection between COVID-19 stress and TMJ disorder is real, and it has a clear biological explanation. When stress levels rise, your body responds … Read more
Yes, you can get chicken pox twice, but it is rare. Most people who have had chicken pox develop lifelong immunity. However, in certain situations, the virus can reactivate or a person can be reinfected. Understanding how the virus works explains why a second case is possible for some people. How Chicken Pox Immunity Works … Read more