The ubiquitous directive to “drink eight glasses a day” is simple to write but false. Fluid needs vary with body size, activity, climate, diet, and state of health. One widely cited reference by the U.S. National Academies estimates average total daily fluid intake—both drink and food water—at about 3.7 liters for men and 2.7 liters for women. Those amounts work out to roughly 125 and 91 US fluid ounces. Because roughly twenty percent of the fluid requirement for a typical day comes from food, what you have to drink is less than the total requirement.

If you menstruate, you understand the feeling: the morning alarm clock sounds, and despite a rejuvenating evening’s sleep, your body is heavy, tired, and utterly spent. Lethargy that strikes at your period is more than “in your head.” Physicians verify it’s the very real physiological symptom brought on through an interaction of fluctuating hormones, blood loss, and lifestyle issues. The great news? If you know what’s going on within your body, there are actionable steps that you can do in order to beat the sluggishness and regain your vitality.

Sugar’s in everything — fizzy beverages, cereals, baked foods, and condiments. But all sugars are not equal. For decades, two titans of the sweetener world have been battling it out: corn syrup (to be specific, high-fructose corn syrup, or HFCS) vs. cane sugar (sucrose). As health more and more becomes a top-of-\-mind consumer priority, all anyone cares to know is: is cane sugar necessarily a healthier alternative to corn syrup, or an exercise in hype and nostalgia? First, let’s dig up some facts and sort through some science behind the two rival sweeteners so you can make a more informed decision.

Air pollution is no longer a far-off mega-city problem; it’s an everyday circumstance for communities worldwide. Wildfires beget smoke, car-congested streets beget smog, even dust storms can profoundly alter what you inhale—most often without you ever being aware of it. But in 2025 you are not helpless. With the help of innovative mobile technology, there are some outstanding smart phone apps that have endowed ordinary citizens with capabilities to monitor minute-to-minute air quality in home towns, thus making effective choices about well-being, activity, and indeed peace of mind.

The problem of healthy sleep in the age of digital technology has given way to constant exposure of blue light: smartphones, tablets, computers, and LEDs are an everyday challenge. The evening blue light disrupts the body to secrete some melatonin the hormone that induces sleep. This disturbance may impede the sleep timing, disrupt sleep quality and interfere with functioning during the day. Luckily, your sleep can be well-protected, as there are science-driven measures to reduce the effect of blue light and prevent its impact.

Vitamin D is key for good health. It is key to strong bones, how well our body fights off germs, and also our mental mood. Even though it matters a lot, many people globally don’t consume enough of it without realizing it. Being very tired, getting flu-like symptoms often, or feeling pains in your bones and muscles may mean that Vitamin D is low in your diet.

Many people enjoy good sleep, but too many also cannot sleep, which makes being happy difficult. Doing some yoga before sleeping may greatly improve your sleep, since it calms the nervous system, relaxes your body, and eases your mind. The following are five unique yoga positions with steps and the advantages you can do in your bedroom, so your body and mind are ready for bed.

For many decades, people everywhere have turned to television for fun, comfort and companionship. Watching TV, starting from solving a crisis to cheering for a winning sports team, to exploring realms of fantasy and dragons, helps us feel many emotions. Would it ever cross your mind that your favorite shows could affect your physical health? If you find that television isn’t helping you feel better, it might be helpful to choose a different episode or channel.