Low-Fat Diets Rich in Fruits and Veggies May Reduce Women’s Risk of Breast Cancer Death, Study Finds
A low-fat diet that prioritizes eating healthier foods like fruits and vegetables each day could lower a woman's risk of dying from breast cancer, according to a multi-decade study published this month.
The federally funded study, which involved almost 49,000 women aged 50-79 years old, found that after around 20 years, those who cut down their dietary fat to 25 percent or less and opted for more fruits and vegetables reduced their risk of dying from breast cancer by 21 percent.
The randomized clinical trial is the first of its kind to demonstrate that a healthy diet may reduce postmenopausal women's risk of death from breast cancer, the Washington Post reported. The results of previous observational studies, which cannot indicate cause and effect, have been inconsistent.
"Patients are eager for things that they can do," Dr. Jennifer Ligibel of the Dana-Farber Cancer Institute, who was not involved in the study, told the Associated Press. "It really suggests that changing your diet, losing weight, exercising, could actually be a treatment."
As part of the large Women's Health Initiative, the study followed 48,835 women who had no prior history of breast cancer for a median of 19.6 years. Beginning in 1993, researchers divided them into groups: one group had diets where 32 percent or more of daily calories came from fat, while the other was instructed to reduce fat in their diet to 20 percent or less and eat daily servings of fruit, vegetables and grains.
Most of the low-fat group, which had to maintain the diet for 8.5 years, managed to limit fat intake to 25 percent or less of their daily calories. They saw an average 3 percent loss in body weight, USA Today reported, noting that the study did not differentiate between types of fat.
From 1993 to 2013, nearly 3,400 cases of breast cancer were diagnosed. After being diagnosed with breast cancer, women in the low-fat group had a 15 percent lower risk of dying from any cause. The Associated Press reported that after 20 years, researchers also began to see a difference between the groups in deaths specifically from breast cancer, though the observed benefit of a low-fat diet was still small, as only 383 women in the study died from the disease. Adopting a low-fat diet did not lower the women's risk of developing breast cancer to begin with, however.
"The balanced diet we designed is one of moderation, and after nearly 20 years of follow-up, the health benefits are still accruing," lead study author Rowan Chlebowski of the Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center said in a press release.
Health experts, including a study co-author, told NPR that our understanding of health and unhealthy fats has grown since the study was designed, so it's difficult to gauge what truly led to the risk reduction, whether it was reducing fat across the board of increasing consumption, general weight loss, or consuming more healthy foods like fruits, vegetables and grains.
Still, Chlebowski told the Washington Post that the study demonstrated that women could improve their health with only simple dietary changes. "It's not like eating twigs and branches," he said. "It's what people were eating, say, 20 years ago, before you could pick up 900 calories in one candy bar."
The study has not yet been published by a peer-reviewed journal, though the results will be presented at the American Society of Clinical Oncology annual meeting in June.
- 21 Reasons to Eat Real Food - EcoWatch ›
- Drinking Coffee Can Be Good for You, but a New Study Suggests ... ›
Yet another former Trump administration staffer has come out with an endorsement for former Vice President Joe Biden, this time in response to President Donald Trump's handling of the coronavirus pandemic.
- Trump Denies CDC Director's 2021 Timeline for Coronavirus Vaccine ›
- Trump Orders Hospitals to Stop Sending COVID-19 Data to CDC ... ›
- Two White House Staffers Test Positive for Coronavirus - EcoWatch ›
- Trump Admin to Disband Coronavirus Task Force - EcoWatch ›
- Pence Offers 'Prayers' as Hurricane Laura Hits Gulf Coast While ›
EcoWatch Daily Newsletter
Every September for the past 11 years, non-profit the Climate Group has hosted Climate Week NYC, a chance for business, government, activist and community leaders to come together and discuss solutions to the climate crisis.
- Covering the 2020 Elections as a Climate Story - EcoWatch ›
- Coronavirus Delays 2020 Earth Overshoot Day by Three Weeks ... ›
By Elliot Douglas
The coronavirus pandemic has altered economic priorities for governments around the world. But as wildfires tear up the west coast of the United States and Europe reels after one of its hottest summers on record, tackling climate change remains at the forefront of economic policy.
- German Business Leaders Call for Climate Action With COVID-19 ... ›
- Climate Activists Protest Germany's New Datteln 4 Coal Power Plant ... ›
By D. André Green II
One of nature's epic events is underway: Monarch butterflies' fall migration. Departing from all across the United States and Canada, the butterflies travel up to 2,500 miles to cluster at the same locations in Mexico or along the Pacific Coast where their great-grandparents spent the previous winter.
Millions of People Care About Monarchs<p>I will never forget the sights and sounds the first time I visited monarchs' overwintering sites in Mexico. Our guide pointed in the distance to what looked like hanging branches covered with dead leaves. But then I saw the leaves flash orange every so often, revealing what were actually thousands of tightly packed butterflies. The monarchs made their most striking sounds in the Sun, when they burst from the trees in massive fluttering plumes or landed on the ground in the tussle of mating.</p><p>Decades of educational outreach by teachers, researchers and hobbyists has cultivated a generation of monarch admirers who want to help preserve this phenomenon. This global network has helped restore not only monarchs' summer breeding habitat by planting milkweed, but also general pollinator habitat by planting nectaring flowers across North America.</p><p>Scientists have calculated that restoring the monarch population to a stable level of about 120 million butterflies will require <a href="https://doi.org/10.1111/icad.12198" target="_blank">planting 1.6 billion new milkweed stems</a>. And they need them fast. This is too large a target to achieve through grassroots efforts alone. A <a href="https://www.fws.gov/savethemonarch/CCAA.html" target="_blank" rel="noopener noreferrer">new plan</a>, announced in the spring of 2020, is designed to help fill the gap.</p>
Pros and Cons of Regulation<p>The top-down strategy for saving monarchs gained energy in 2014, when the U.S. Fish and Wildlife Service <a href="https://www.fws.gov/southeast/pdf/petition/monarch.pdf" target="_blank">proposed</a> listing them as threatened under the Endangered Species Act. A decision is expected in December 2020.</p><p>Listing a species as endangered or threatened <a href="https://www.fws.gov/endangered/esa-library/pdf/listing.pdf" target="_blank">triggers restrictions</a> on "taking" (hunting, collecting or killing), transporting or selling it, and on activities that negatively affect its habitat. Listing monarchs would impose restrictions on landowners in areas where monarchs are found, over vast swaths of land in the U.S.</p><p>In my opinion, this is not a reason to avoid a listing. However, a "threatened" listing might inadvertently threaten one of the best conservation tools that we have: public education.</p><p>It would severely restrict common practices, such as rearing monarchs in classrooms and back yards, as well as scientific research. Anyone who wants to take monarchs and milkweed for these purposes would have to apply for special permits. But these efforts have had a multigenerational educational impact, and they should be protected. Few public campaigns have been more successful at raising awareness of conservation issues.</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="91165203d4ec0efc30e4632a00fdf57d"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/KilPRvjbMrA?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
The Rescue Attempt<p>To preempt the need for this kind of regulation, the U.S. Fish and Wildlife Service approved a <a href="https://www.fws.gov/savethemonarch/pdfs/Monarch%20CCAA-CCA%20Public%20Comment%20Documents/Monarch-Nationwide_CCAA-CCA_Draft.pdf" target="_blank">Nationwide Candidate Conservation Agreement for Monarch Butterflies</a>. Under this plan, "rights-of-way" landowners – energy and transportation companies and private owners – commit to restoring and creating millions of acres of pollinator habitat that have been decimated by land development and herbicide use in the past half-century.</p><p>The agreement was spearheaded by the <a href="http://rightofway.erc.uic.edu/" target="_blank">Rights-of-Way Habitat Working Group</a>, a collaboration between the University of Illinois Chicago's <a href="https://erc.uic.edu/" target="_blank" rel="noopener noreferrer">Energy Resources Center</a>, the Fish and Wildlife Service and over 40 organizations from the energy and transportation sectors. These sectors control "rights-of-way" corridors such as lands near power lines, oil pipelines, railroad tracks and interstates, all valuable to monarch habitat restoration.</p><p>Under the plan, partners voluntarily agree to commit a percentage of their land to host protected monarch habitat. In exchange, general operations on their land that might directly harm monarchs or destroy milkweed will not be subject to the enhanced regulation of the Endangered Species Act – protection that would last for 25 years if monarchs are listed as threatened. The agreement is expected to create up to 2.3 million acres of new protected habitat, which ideally would avoid the need for a "threatened" listing.</p>
A Model for Collaboration<p>This agreement could be one of the few specific interventions that is big enough to allow researchers to quantify its impact on the size of the monarch population. Even if the agreement produces only 20% of its 2.3 million acre goal, this would still yield nearly half a million acres of new protected habitat. This would provide a powerful test of the role of declining breeding and nectaring habitat compared to other challenges to monarchs, such as climate change or pollution.</p><p>Scientists hope that data from this agreement will be made publicly available, like projects in the <a href="https://www.fws.gov/savethemonarch/MCD.html" target="_blank">Monarch Conservation Database</a>, which has tracked smaller on-the-ground conservation efforts since 2014. With this information we can continue to develop powerful new models with better accuracy for determining how different habitat factors, such as the number of milkweed stems or nectaring flowers on a landscape scale, affect the monarch population.</p><p>North America's monarch butterfly migration is one of the most awe-inspiring feats in the natural world. If this rescue plan succeeds, it could become a model for bridging different interests to achieve a common conservation goal.</p>
The annual Ig Nobel prizes were awarded Thursday by the science humor magazine Annals of Improbable Research for scientific experiments that seem somewhat absurd, but are also thought-provoking. This was the 30th year the awards have been presented, but the first time they were not presented at Harvard University. Instead, they were delivered in a 75-minute pre-recorded ceremony.