In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: CHICAGO--A new study lends further evidence to a suspected link between abnormal breast growth in young boys--called prepubertal gynecomastia--and regular exposure to lavender or tea tree oil, by finding that key chemicals in these common plant-derived oils act as endocrine-disrupting chemicals. The study results will be presented Monday at ENDO 2018, the Endocrine Society's 100th annual meeting in Chicago. 
  
 Lavender and tea tree oil are among the so-called essential oils that have become popular in the United States as alternatives for medical treatment, personal hygiene and cleaning products, and aromatherapy. Various consumer products contain lavender and tea tree oil, including some soaps, lotions, shampoos, hair-styling products, cologne and laundry detergents. 
  
 "Our society deems essential oils as safe," said study lead investigator J. Tyler Ramsey, a postbaccalaureate research fellow at the National Institute of Environmental Health Sciences (NIEHS), part of the National Institutes of Health. "However, they possess a diverse amount of chemicals and should be used with caution because some of these chemicals are potential endocrine disruptors." 
  
 An endocrine-disrupting chemical is a chemical in the environment that interferes with hormones and their actions in the body. 
  
 Male gynecomastia occurring before puberty is relatively rare, but a growing amount of cases have been reported to coincide with topical exposure to lavender and tea tree oil, and the condition went away after the boys stopped using the oil-containing products, Ramsey said. Researchers at the NIEHS, including Kenneth Korach, Ph.D., a co-investigator for the new study, previously found laboratory evidence that lavender and tea tree oil have estrogenic (estrogen-like) properties and anti-androgenic (testosterone inhibiting-like) activities, meaning they compete or hinder the hormones that control male characteristics, which could affect puberty and growth. 
  
 Under Korach's direction, Ramsey and his NIEHS colleagues went a step further. From the hundreds of chemicals that comprise lavender and tea tree oil, they selected for analysis eight components that are common and mandated for inclusion in the oils. Four of the tested chemicals appear in both oils: eucalyptol, 4-terpineol, dipentene/limonene and alpha-terpineol. The others were in either oil: linalyl acetate, linalool, alpha-terpinene and gamma-terpinene. Using in vitro, or test tube, experiments, the researchers applied these chemicals to human cancer cells to measure changes of estrogen receptor- and androgen receptor-target genes and transcriptional activity. 
  
 All eight chemicals demonstrated varying estrogenic and/or anti-androgenic properties, with some showing high or little to no activity, the investigators reported. Ramsey said these changes were consistent with endogenous, or bodily, hormonal conditions that stimulate gynecomastia in prepubescent boys. 
  
 "Lavender oil and tea tree oil pose potential environmental health concerns and should be investigated further," he said. 
  
 Of further concern, according to Ramsey, is that many of the chemicals they tested appear in at least 65 other essential oils. Essential oils are available without a prescription and are not regulated by the U.S. Food and Drug Administration. Thus, the public should be aware of these findings and consider all evidence before deciding to use essential oils. The NIEHS Division of Intramural Research funded this study through its support of Korach. 
  
 The researchers will present their findings during a press conference at 10 a.m. Central on Saturday, March 17. Register to view the live webcast at endowebcasting.com. 
  
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 Endocrinologists are at the core of solving the most pressing health problems of our time, from diabetes and obesity to infertility, bone health, and hormone-related cancers. The Endocrine Society is the world's oldest and largest organization of scientists devoted to hormone research and physicians who care for people with hormone-related conditions. ||||| Young boys receiving regular exposure to essential oils such as lavender or tea tree oil could be at risk of a rare condition that makes their breast tissue swell abnormally, a new study suggests. 
  
 The findings, being presented this week, add further evidence that certain plant-derived oils contain chemicals capable of disrupting human hormones – a stark reminder that just because these extracts come from nature, they aren't necessarily good for us. 
  
 "Our society deems essential oils as safe," says developmental biologist J. Tyler Ramsey from the National Institute of Environmental Health Sciences (NIEHS). 
  
 "However, they possess a diverse amount of chemicals and should be used with caution because some of these chemicals are potential endocrine disruptors." 
  
 Essential oils – meaning they contain the chemical 'essence' of plants, as opposed to being indispensable – are found in all sorts of consumer products, from soaps and lotions through to alternative medical treatments, aromatherapy oils, and cleaning products. 
  
 While they might be ubiquitous, there is concern in the research community that certain chemical components in these oils may be dangerous to human health, whether by being toxic, or by affecting how our bodies work. 
  
 NIEHS developmental biologist Kenneth Korach worked on a study that raised these fears a decade ago, finding that lavender and tea tree oil contain chemicals that mimic oestrogen and inhibit testosterone. 
  
 Those findings were the result of analysis of human cells exposed to the oils, but the research wasn't just conducted in the lab. It also considered the experience of three young boys aged four, seven, and ten, who all exhibited signs of prepubertal gynecomastia – a rare condition where males develop enlarged breast tissue. 
  
 In those cases, the swelling coincided with topical application of products that contained lavender and tea tree oils, but the effects went away after use of the essential oils ended. 
  
 Subsequent research on rats has cast doubt on this seeming oestrogenic potential of lavender oil, but now Korach and Ramsey have new evidence of why these essential oils could be harmful to boys after all. 
  
 In a new analysis, the researchers tested eight specific chemicals of the hundreds that appear in lavender or tea tree oil, testing them in the lab against human breast cancer cells. 
  
 The experiments revealed all eight of the chemicals tested classify as endocrine disruptor chemicals (EDCs), displaying varying levels of oestrogenic and/or anti-androgenic (testosterone-inhibiting) properties. 
  
 While some of the chemicals tested didn't actually have much of an effect, others did, and all were technically EDCs capable of contributing to the stimulation of mammary gland conditions in boys' bodies, the researchers say. 
  
 Even more alarmingly, the EDCs the team tested aren't contained to just lavender and tea tree oil – they're also present in at least 65 other essential oils currently on the market. 
  
 All up, these 67 extracts are contained in a huge range of products that don't require a prescription to buy, and which aren't regulated by the FDA, and the researchers warn it's important we learn more about the potential risks these oils may present. 
  
 But others explain that because of the limited amount of data we have so far on this rare phenomenon, we shouldn't jump to conclusions about the dangers of essential oils – especially since the latest findings haven't yet had a chance to be peer-reviewed by other experts. 
  
 While acknowledging that the new evidence seems to confirm why lavender and tea tree oil have this effect on young boys, paediatrician Ieuan Hughes from the University of Cambridge, who wasn't involved in the study, says there's still a lot we don't know. 
  
 "Not everyone exposing themselves to such oils has adverse effects, so it is possible there are particular individuals who may be more sensitive to the effects of the chemicals, or perhaps are using the products in excess," Hughes told the BBC. 
  
 "There is a complex relationship between oestrogen, testosterone and other hormones in the body, that cannot be replicated in these experiments," he added. 
  
 "Clearly, the longer-term effects of such exposure are unknown." 
  
 The findings are being presented at the Endocrine Society's annual meeting in Chicago, Illinois, on Monday. |||||
A: 
Wait a minute before dabbing lavender essential oil on your male child: A new study finds that regular exposure to certain plant-derived oils puts boys at risk of prepubertal gynecomastia—or, as Science Alert bluntly puts it, "man boobs." "Our society deems essential oils as safe," says the developmental biologist who led the study. "However, they possess a diverse amount of chemicals and should be used with caution because some of these chemicals are potential endocrine disruptors." That essentially means they can mess with hormones, and there have been a number of cases of young boys developing breasts after topical exposure to lavender and tea tree essential oils, per a press release. (In those cases, symptoms subsided after exposure was halted.) The new study analyzed eight common chemicals out of the hundreds found in those two oils. Scientists tested the chemicals against human breast cancer cells and found that all eight of them were indeed endocrine disruptor chemicals (EDCs) and displayed levels of estrogen-like properties and/or testosterone-inhibiting properties—meaning they could play a part in stimulating mammary gland conditions in a prepubescent male body. And many of those chemicals are also in at least 65 other essential oils, the lead author says, which is particularly concerning since the FDA does not regulate essential oils and no prescription is required to buy them. They're currently popular for use in everything from cleaning products to toiletries to alternative health treatments. The study authors say essential oils should be used with caution, but Science Alert notes that there is, so far, limited research on these effects and the latest findings have not yet been peer-reviewed. (The fervor for essential oils is bad news for frankincense forests.)