The most popular New Year's resolution of 2015 was "stay fit and get healthy." It's hard to find someone who doesn't have that goal.

But in the pursuit of health, we've been led to believe that certain healthy habits actually aren't healthy at all, Business Insider reports.

Here are some you should keep in mind.

The gluten-free craze.

As ATTN: previously reported in April, those who are not suffering from celiac disease or some form of gluten allergy but still insist on eating gluten-free foods could actually be doing harm to their bodies and health. At the very least, it's giving in to aggressive marketing and potentially taking gluten-free food from someone who actually needs it.

Toilet seat covers.

Many public restrooms in the United States provide paper toilet seat covers, but how much do they actually protect you from disease? Basically zero. As Erin Brodwin notes for Business Insider, "by the time you sit down on a public toilet seat — even one that was recently used by someone else — most harmful pathogens probably won't be able to infect you." Dr. William Schaffner Chairman, Department of Preventive Medicine at Vanderbilt, assured readers of The Huffington Post. "Toilet seats are not a vehicle for the transmission of any infectious agents — you won’t catch anything," he added. The paper liner is pointless.

The standing desk fad.

If you choose to stand over sitting at work, don't expect long-term health benefits. According to Business Insider, a CDC survey on standing desk use among adults found "standing instead of sitting didn't do much to protect people from dying earlier than they should have (sorry, standing-desk fans)." However, standing does indeed burn more calories than sitting, Brodwin notes.

Juicing everything.

As ATTN: previously reported, smoothies are one of those food items Americans think are healthy, but typically really aren't, as smoothies are usually packed with sugar. Juicing is also a problematic health trend. "When you juice fresh fruits and veggies," Brodwin writes, "you remove all of their fiber, the key ingredient that keeps you feeling full and satisfied until your next meal." So you remove the good (fiber) but you leave the bad (sugar).

Detoxing or "teatoxing."

You've probably seen something like "detox tea" all over Instagram at some point. A "teatox," if you will. As ATTN: previously reported, going on a teatox involves drinking special tea that is infused with senna. As Kyle Jaeger writes, "Excessive use of senna can cause cramping, indigestion, and dehydration, pharmacists say." They're also not going to help with long-term, sustainable weight loss. And when it comes to any sort of detox, as Brodwin writes, "unless you've been poisoned, you already have a superefficient system for filtering out most of the harmful substances you eat."

Using the Body Mass Index System BMI to determine what a healthy weight is.

As ATTN:'s Danielle DeCourcey previously wrote in April, "BMI is a simplistic and many say flawed method of determining a healthy weight range for someone's height." In fact, BMI was also not designed as a method to determine a healthy weight. As DeCourcey writes, "the Belgian mathematician Lambert Adolphe Jacques Quetelet, who created the system in the 19th century, never meant for it to be a definitive formula for someone's 'fatness,' according to NPR." If you're seeking better health in 2017, don't depend on your BMI to guide the way.

[H/T Business Insider]