Fix it: Look for deodorants that boast all-natural ingredients such as cymbopogon flexuosus oil, a natural deodorizer culled from an organic lemongrass plant. Tom's of Maine's Original Care Deodorant ($5, tomsofmainestore.com), does not contain any of the above toxins, and publishes a full list of its products' ingredients and what they're used for.
BPA-free has become one of those buzz words that we think translates to "safe." But, that's not always the case. In a 2011 study published in Environmental Health Perspectives, researchers tested and analyzed more than 400 common plastics found in different types of bottles—including BPA-free ones—and found that 70% tested positive for endocrine disruptors and released chemicals that mimic the sex hormone estrogen. What gives? Ironically, some materials that manufacturers are subbing in for BPAs are now the ones emitting these nasty toxins. And the more flexible the plastic, says Gaughran, "the more plasticizers are in the bottle and the more toxins are leaching into the water or drink as a result."
Fix it: Consider glass water bottles instead. Try Lifefactory's glass water bottle ($27, lifefactory.com) which is covered in a grip-friendly, non-toxic silicone sleeve.
MORE: Your Water Bottle Has 24, 500 Chemicals In It
There's new technology in the form of silver woven into fabric that can help keep workout apparel odor-free. The problem is that those tiny microscopic particles of silver, called nanoparticles, don't stay on your clothing, but rather, rub off on you. An animal study in the journal Environmental Science & Technology showed that nanoparticles can detach from clothing and get absorbed by your skin when you sweat, leaving you exposed to untested and potentially harmful levels of the metal. In fact, researchers found that people wearing this apparel would have exposure to silver in an amount that's nearly three times more than you'd get in a dietary supplement containing the metal. While not much is known about silver's effect on humans, those silver nanoparticles have been shown to damage lung, liver, and kidney function in animals.
Fix it: Opt for naturally antimicrobial performance apparel instead, like pieces made from bamboo. The apparel line Devigi (prices start at $7; devigi.com), uses composite bamboo fabrics.
MORE: 1 0 Worst Germ Hot Spots You Touch Every Day
Many yoga mats are composed of PVC (aka vinyl), which is one of the most toxic plastics according to the Centers for Disease Control. There isn't much research on yoga mats specifically, but to give you an idea of what the issue with PVC is, brand new PVC shower curtains have been found to release as many as 108 volatile organic chemicals into the air. Those toxic gas chemicals can not only damage the liver and central nervous system, but can also cause developmental damage and wreak havoc on the respiratory and reproductive systems, according to the Center for Health, Environment & Justice.
Fix it: Luckily, non-toxic, environmentally-friendly yoga mats do exist. Look for ones made from natural rubber, jute, hemp, cotton or TPE Material (Thermo Plastic Elastomer), which is non-toxic and biodegradable. Thinksport's Yoga/Pilates mat ($40, thinkbaby.com) is latex-, PVC-, and lead-free, and made from safe, non-toxic materials.
MORE: Does Your Yoga Mat Stink?
Energy & Protein Drinks
After a tough workout, it's best to refuel your body with food that helps replenish the nutrients you lost and rebuilds the muscles you worked. But sometimes the very food or protein drink that's supposed to be helping you recover can actually hurt you. One of the biggest culprits: acid. A study in General Dentistry showed that an increased use of sports drinks eats away at the enamel on teeth—and causes irreversible damage. Damage was noted after just five days of repeated exposure.
Fix it: Skip the sports drink and reach for water or a banana instead. Research has shown that consuming a banana post-sweat session was just as, if not more, productive in refueling the body than a sports drink.