We're not talking about the heartwarming 'cuppa' much loved by Brits, or even the perfumed kind preferred by the Chinese! We are referring to the chemical compounds TEA - or Triethanloamine along with DEA (Diethanolamine) and MEA (Monoethanolamine), which are frequently used in mass-market brands of skin care in th role of solvents, emulsifiers and wetting agents.
These chemicals are also used to balance the pH of cosmetic and personal care and appears in the formulations of a variety of different products - including skin lotion, eye gels, moisturizers, shampoos, shaving foams etc.
Whilst Triethanolamine itself is not classified as carcinogenic to humans - some individuals may develop dermatitis when their skin comes into contact with it, especially if concentrations are relatively high.
Where nastier problems could arise is when TEA/DEA/MEA comes into contact with nitrosating agents that are often found in many personal care products when nitrites used in their preservation start to break down (which is most likely to happen after poor, or prolonged storage). This leads to the formation of N-nitrosodiethanolamine (NDEA) which is a human carcinogen (cancer-causing) agent.
The US Dept of Health and Human Services' National Toxicology Program, 1997 (NTP TR 478) which studied DEA in depth (which chosen for study due to the fact that many people are regularly exposed to it through their personal care products) stated that there was clear evidence of carcinogenic activity by the chemical toxins formed by DEA in combination with nitrostaing agents.
Names to look out for when scrutinizing those product labels include:
DEA (Diethanolamine), TEA (Tea, triethanolamine), MEA(Cocamide DEA; Laurimide DEA; Linoleamide DEA, Oleamide DEA)
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