Most people see them as a guarantee of safety against harmful pathogens, but the antibacterial chemicals commonly added to soaps, toothpastes and various other personal care products could be making you sick. A new study out of South Korea has found that the popular antibacterial additive, triclosan, exhibits cancer-promoting effects both in vitro andin vivo, a finding that could have significant implications for humans.
For their research, Kyung-Chul Choi and colleagues from Chungbuk National University and the Korea Research Institute of Bioscience and Biotechnology looked at triclosan in the context of how it affects the hormonal system. A known hormone-disruptor, triclosan has been shown in previous research to mimic the feminizing hormone estrogen, which in turn alters the normal production and expression of other hormones like testosterone.
As a result, triclosan appears to throw the endocrine system out of balance, leading to abnormal cellular growths. Particularly in women, triclosan appears to trigger the growth of breast cancer cells, leading to the formation of malignant tumors. This was demonstrated both in cell samples and in live mice, as breast cancer cells were shown to thrive in the presence of triclosan.
After comparing the frequency and progression patterns of breast cancer growth in both the cell samples and the mice, some of which were exposed to triclosan and some of which were not, it became clear that the chemical spurs abnormal cell proliferation. And the fact that triclosan bioaccumulates in the body over time makes the threat of it even more pronounced.
“Although the doses of EDCs were somewhat high, we did this to simulate the effects of daily exposure, as well as body accumulation due to long-term exposure, simultaneously in animal experiments,” stated Choi. “Thus, exposure to EDCs may significantly increase the risk of breast cancer development and adversely affect human health,” wrote he and the others in their paper.
Octylphenol amplifies cancer-causing effects of triclosan
The team also identified another antibacterial chemical, octylphenol, which exhibits similar cancer-promoting effects. Though lesser known than triclosan, octylphenol was shown to work in conjunction with triclosan to amplify the growth and spread of cancer cells, illustrating the immense dangers associated with these ubiquitous chemicals.
“Research has found that two EDCs — triclosan, an antimicrobial ingredient in many products, including soaps, cosmetics and cutting boards; and octylphenol, which is in some paints, pesticides and plastics — have accumulated in the environment,” explains ScienceDaily.com. “Additionally, triclosan is reportedly in the urine of an estimated 75 percent of Americans.”
Consumer groups like Beyond Pesticides and the Environmental Working Group (EWG) have been raising awareness about the dangers of triclosan for years, highlighting its status as a known endocrine-disrupting chemical (EDC) and pushing for its removal from personal care products. But many commercial products still contain it, which is why consumers need to beware.
“Studies have increasingly linked triclosan and its chemical cousin triclocarban, to a range of adverse health and environmental effects, from skin irritation, endocrine disruption, bacterial and compounded antibiotic resistance, to the contamination of water and its negative impact on fragile aquatic ecosystems,” explains Beyond Pesticides.
So what products contain triclosan?
Due to public pressure, many major manufacturers have quietly begun reformulating their products without triclosan. Product formulations may change without notice. Below is a small sampling of products formulated with, or used to be formulated with triclosan and is not to be considered a comprehensive list. Remember to always refer to product labels to determine whether triclosan is contained in your product. Some retail outlets may still carry older formulations. Look out for labels that state: “antimicrobial protection.” Some antibacterial soaps may use triclosan’s cousin, triclocarban, in place of triclosan.
Soap: Dial® Liquid handsoap and bodywash; Tea Tree Therapy™ Liquid Soap; Clearasil® Daily Face Wash; Dermalogica® Skin Purifying Wipes; DermaKleen™ Antibacterial Lotion Soap; CVS Antibacterial Soap, Ajax Antibacterial Dishsoap, Ultra Concentrated Dawn Antibacterial Dishsoap, Kimcare Antibacterial Clear Soap, Bath and Body Works Antibacterial Hand Soaps, Gels and Foaming Sanitizers.
Dental Care: Colgate Total®; Breeze™ Daily Mouthwash; Reach® Antibacterial Toothbrush
Cosmetics: Garden Botanika® Powder Foundation; Mavala Lip Base; Movate® Skin Litening Cream HQ; Paul Mitchell Detangler Comb, Revlon ColorStay LipSHINE Lipcolor Plus Gloss, Babor Volume Mascara, Phytomer Perfect Visage Gentle Cleansing Milk, Phytomer Hydracontinue Instant Moisture Cream, Bath and Body Works Antibacterial Moisturizing Lotions.
Deodorant: Arm and Hammer® Essentials Natural Deodorant; Queen Helene® Tea Trea Oil Deodorant and Aloe Deodorant; DeCleor Deodorant Stick; Epoch® Deodorant with Citrisomes.
First Aid: SyDERMA® Skin Protectant plus First Aid Antiseptic; Healwell Plantar Fasciitis Night Splint; Solarcaine® First Aid Medicated Spray; Nexcare™ First Aid, Skin Crack Care; : Universal Cervical Collar with Microban.
Kitchenware: Farberware® Microban Cutting Boards; Franklin Machine Products FMP Ice Cream Scoop SZ 20 Microban; Hobart Semi-Automatic Slicer; Chix® Food Service Wipes with Microban; Compact Web Foot® Wet Mop Heads.
Other Personal Care Products: Murad Acne Complex® Kit, ®; Diabet-x™ Cream; Scunci Microban Comb, Sportslick Pocket Slick.
Clothes: Biofresh® socks, undergarments, tops and bottoms.
Office and School Products: Ticonderoga® Pencils with Microban Protection, Avery® Touchgaurd View Binders, C-line® products, Clauss® cutting instruments, Costco® products, Sharp® printing calculators. Westcott® scissors
Other: Bionare® Cool Mist Humidifier; Deciguard AB® Antimicrobial Ear Plugs; Bauer® Re-Akt hockey helmet and 7500 hockey helment; Miller Paint Acro Pure Interior Paint; Holmes Foot Buddy™ HMH120U Antimicrobial Foot Buddy Foot Warmer, Blue Mountain Wall Coverings, California Paints®, Davis Paint® Perfection, Hirschfield’s Paint®,O’Leary Paint®, EHC AMRail Escalator Handrails, Dupont™ Air Filters, Winix Dehumidifiers, J Cloth® towels, select Quickie cleaning products, Kimberly Clark® WYPALL X80 Towels, Canopy® kitchen towels, ALUF Plastics®, BioEars earplugs, Petmate® LeBistro feeders and waterers, Infantino cart covers and baby carriers, Oreck XL®, Bissell Healthy Home Vacuum™, NuTone® Central Vacuum systems, Rival® Seal-A-Meal® Vacuum Food Sealer, CleenFreek SportsHygiene Yoga Mat, Resilite Sports Products, Rubbermaid® Coolers, Stufitts sports gear, Venture Products® fitness mats, Custom Building Products, DAP®Kwik Seal Plus®, Laticrete, Niasa Biquichamp® mortar grout and sealant, ProAdvanced Products.