AMercy girls now pass through puberty significantly earlier than in decades prior, a trend that is related to physiological and psychological risks. The various factors considered to be early puberty include obesity, toxic stress, and environmental factors. A landmark study published Monday looks at a particular type of environmental element – the chemicals in household items.
A long-working study on mothers and children is released Person reproduction Determines that the onset of female puberty is associated with exposure to chemicals such as phthalates, parabens, and the antibacterial agent triclosan. The products are widely used in personal care products, like some brands of perfumes, cosmetics and toothpaste. The same result was not found in populations of boys, whose timbering of puberty was also examined in the study.
"We have known for the past 15-20 years that the girls are puberty at an earlier age, as they used to be in the past," lead author and university of California, Berkeley Associate Professor Kim Harley, Ph.D. Told Reverse. "We certainly know that obesity plays a role in that but now we also know that the hormone disrupting chemicals that are in our homes and our environment can be an additional factor that's contributing to this."
While it's too late to say that the widely used chemicals are definitive earlier, Harley believes that "We need to pay attention to the chemicals, and we are right to have enough information about them to be sure."
Discovering the cause of early puberty is important to scientists because the phenomenon is linked to a higher risk of developing depression, a greater risk for teen pregnancy, and an increased likelihood of developing diseases such as breast cancer and heart disease.
The new study investigation is based on data on pregnant women and children who brought birth to the Center for Health Assessment of Mothers and Children of Salinas Study between 1999 and 2000. When women were around 14 and 27 weeks , They gave the scientists a consensus to examine their urine sample for the concentration of phthalates, parabens, and phenols. After the women gave birth, the team collected urine samples and evaluated the puberty development of the resulting 179 girls and 159 boys. Every nine months between the ages of 9 and 13, scientists checked to see how puberty was affecting the children.
Overall, 90 percent of the urine samples have shown the concentration of all the components they tested. It is only detected in the 73 percent of pregnant women's samples and 69 percent of samples taken from the nine-year-old girls.
Mothers whose samples contained Diethal Fathhalate and Tricolson, had daughters in puberty before. For every doubling of triclosan in the mother's urine, the timing of the girls & # 39; First menstrual period shifted by just under a month and for each doubling in the samples for an indicator for phthalates, the development of girls' hair shifts by 1.3 months earlier. The yarn samples taken from 9-year-old girls have found that, for each doubling of concentrations of parasites, breast and public hair development, as well as their first time, happened one hour earlier than average.
One reason the chemicals may affect puberty is because all of them are known as endocrine disruptors. Previous studies on animals and humans have demonstrated that endocrine disrupters have the ability to mimic, block, or otherwise interfere with the body hormones.
"They can link to hormone receptors, such as estrogen receptors, and influenza changes in our bodies," explains Harley. "That's what we care about.We have learned from animal studies that chemicals can impact development in rats, especially if the exposure is in utero, and now we are starting to study human studies that they can also impact on development . "
What is happening about sharing the results of this study, says Harley, is that for now all they can say is that the "chemicals of concern." The Centers for Disease Control and Prevention Easy Convinced That It's Widespread Exposure to Phthalates and parabens, with the majority of Americans who have been tested with evidence of the chemicals in their urine. However, the agency states that finding a measurable amount of chemicals does not mean that they have an adverse health effect.
Harley hopes that the regulators look at the students as Hirsch when they are ahead of conducting policy decisions and regulations. As now, she explains, there is no established Benchmark level that stands when it is no longer safe to be exposed to the chemicals. It is not illegal to have them in personal care products because the science is not strong enough to say that they absolutely cause adverse health effects. They are controversial chemicals, and about 70 percent of Americans are in their bodies.
"The chemicals are basically ubiquitous," says Harley. "The regulation is not really there, and science is still equivocal, but for people who care, there are things that you can do."
The advice is simple: Reduce exposure to chemicals by changing the personal care products that you use and purchasing products that do not contain them. Scientists can not say for sure what will change for you if you do, but do so certainly can not hurt.