The human health risk assessment concluded that there are no risks of concern because no toxic effects have been identified when used as a dermally applied insect repellent, and there is no dietary or occupational exposure for DEET.
People that have swallowed products containing DEET have experienced stomach upset, vomiting, and nausea. Very rarely, exposure to DEET has been associated with seizures in people.
DEET is a widely used repellent that deters pests by making it harder for them to smell humans. Despite being effective, it has faced controversy over potential health and environmental impacts, including skin irritation and toxicity concerns. Some countries have even banned DEET due to these risks.
Occasionally, there have been reports of people having negative reactions after excessive use of repellents containing DEET. These effects included seizures, uncoordinated movements, agitation, aggressive behavior, low blood pressure, and skin irritation.
It is absorbed through the skin and digestive tract, so it is likely that DEET can also be absorbed through the lungs and into the blood. DEET in the lungs can be coughed up and swallowed, if it is not absorbed first.
Very often, people don't wash the product off their skin after returning indoors. This can result in overexposure, especially in cases where a product is applied too often (at short intervals) or daily for several days. A small amount of DEET is absorbed into the body when applied to the skin.
N, N-diethyl-meta-toluamide (DEET) is a repellent used since the 1950s and is metabolized by the liver and excreted in urine. DEET toxidrome ranges from GI upset to neurologic toxicity. However, liver injury is not a commonly attributed phenomenon.
Why does DEET have a reputation for being harmful? DEET is neither intended nor safe for ingestion. Dr. Amin notes that oral intake can result in side effects such as nausea, vomiting, and (in rare cases) seizures.
DEET has been classified as a Group D carcinogen (not classifiable as a human carcinogen.) Although DEET's use has been implicated in seizures among children, the Agency believes that the incident data are insufficient to establish DEET as the cause of the reported effects.
Health Canada decided to limit DEET concentration to 30% in the country since 2002 due to an increased long-term risk observed with repeated applications. DEET is often sold and used in spray or lotion in concentrations up to 100%.
If used improperly, such as if someone swallows it or applies too much, DEET can cause severe health effects like seizures, low blood pressure, uncoordinated movements or death, Dr. Kennedy said. But those cases are rare — seizures, for example, occur only once in every 100 million uses, according to the E.P.A.
DEET, picaridin, and natural oils like lemon and eucalyptus oil are all very common and safe ingredients found in bug repellent. Some people prefer to stay away from DEET, as it can burn when it gets in your eyes and often comes with a potent smell.
There is no reliable evidence that deet causes cancer.
A Swedish study did find that men who used insect repellent for 115 days or longer faced an increased risk of developing testicular cancer.
There have also been scattered research reports tying DEET to health concerns. One 2009 study concluded that DEET may prevent the normal breakdown of acetylcholine, a nervous system chemical that triggers movement and muscle activity. Some older research has also tied DEET to seizures or brain toxicity in children.
DEET is a documented neurotoxin, meaning it can negatively impact the nervous system. When mixed with permethrin, another pesticide, animal studies show the mixture can cause the death of neurons in the brain and disease in the offspring of exposed adults.
For more than 60 years, DEET has reigned as the undisputed champion of insect repellents. No longer. There's now a potentially better alternative on the market: picaridin. Both DEET and picaridin are proven to be effective at fending off ticks—and are superior to other repellents when it comes to protection time.
Skin absorption is more likely to occur if you use highly concentrated formulas of DEET, if it is applied to broken or irritated skin, or with repeated applications. Covering the skin with clothing after applying DEET can also increase absorption and result in poisoning.
DEET has an excellent safety profile and has remarkable protection against mosquitoes, ticks and various other arthropods. Toxicity is unusual, and is generally associated with incorrect, or overuse of the product. We report a patient with severe toxicity following inhalational exposure to a "bug bomb".
Whether and how much DEET use causes reproductive problems in humans will need to be confirmed in future studies. Such studies have been scarce to date in humans because of the ethical concerns involved.
It's a chemical, after all — and bodies often react to chemicals. Some people experience rashes or irritated skin after using DEET. It can also irritate your eyes if sprayed too close to your peepers. More alarming, there have been rare reports of seizures associated with DEET.
Yes, our Expedition 100+ DEET Insect Repellent spray remains compliant and available for sale in the UK and Ireland.
According to the Centers for Disease Control and Prevention (CDC) , DEET products are usually safe as long as people follow their label instructions and do not use them heavily. When choosing a DEET product, a person must use the lowest percentage necessary for the amount of time they will be outside.
Federal Environmental Protection Agency spokesman Albert Heier confirmed that New York is the first state to restrict DEET. The EPA believes a small number of people may be particularly sensitive to the chemical and recommends it be used sparingly, Heier said from Washington.
When a mosquito bites, it injects saliva through one channel. However, the blood it sucks as a meal flows in a completely separate channel and only in one direction, toward the mosquito. So the answer therefore is that it is biologically unlikely for mosquitoes to transmit Hepatitis B.
Nevertheless, no repellent is 100 percent safe and all repellents must be used carefully. Use of DEET concentrations above 50 percent have been associated with increased skin irritation and similar reactions.