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Awareness

Chemicals in Yoga Mats Linked to Infertility in Women

8/31/2017

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Women with higher urinary concentrations of a common type of flame retardant had reduced likelihood of clinical pregnancy and live birth than those with lower concentrations, according to researchers at Harvard T.H. Chan School of Public Health.
Picture
Image from Gaia.com
The study, conducted in the Fertility Clinic at Massachusetts General Hospital, is the first to examine associations between organophosphate flame retardants (PFRs)—which are used in polyurethane foam in many products, including upholstered furniture, baby products, gym mats, and even some phone cases—and reproductive outcomes in women. PFR's can be absorbed by the body through physical contact. These chemicals are not chemically bonded to foam and have been shown to migrate into the air and dust of indoor environments

“These findings suggest that exposure to PFRs may be one of many risk factors for lower reproductive success,” said first author Courtney Carignan. “They also add to the body of evidence indicating a need to reduce the use of these flame retardants and identify safer alternatives.”

Infertility, defined as the inability to get pregnant after 1 y or more of unprotected intercourse, affects one in six couples worldwide. One study found that pregnancy loss (miscarriage) affected approximately 28% of couples planning a pregnancy. Infertility has an associated health-care cost in the billions of dollars per year, not including the physical and psychological burden placed on the couple. Both the high rates of fertility along with the associated high costs should prompt the need to improve our understanding of risk factors that impair the ability to have a child.

One potential risk factor is environmental exposure. Several classes of endocrine-disrupting chemicals (EDCs) with widespread general population exposure, including pesticides and phthalates, have been linked to infertility and adverse pregnancy outcomes. Since EDCs are ubiquitous, only a fraction have been evaluated for effects on infertility and pregnancy. PFRs are a class of EDCs with omnipresent exposure that have been detected in 90–100% of adult urine samples. Over the past decade, PFRs have been used widely in the polyurethane foam of upholstered furniture as replacements for pentabromodiphenyl ether, a flame retardant mixture that was phased out of use in 2005.

Animal studies indicate that exposure to PFRs can disrupt endocrine function through altered thyroid action, steroidogenesis, or estrogen metabolism, and can also impair embryo development. Researchers have observed  increasing PFR exposures were associated with a decrease in sperm motility and increased serum total T3 levels, in a small study of men. 

The aforementioned study explored the association between urinary concentrations of PFRs and pregnancy outcomes among women in a prospective cohort study, the Environment And Reproductive Health (EARTH) study, using assisted reproductive technologies (ART) as a model to study early developmental endpoints and pregnancy outcomes.

In conclusion, using IVF (in vitro fertilization) as a model to investigate human reproduction and pregnancy outcomes, we found that concentrations of some urinary PFR metabolites were inversely associated with proportions of successful fertilization, implantation, clinical pregnancy, and live birth. These results highlight the potential reproductive effects of low-level exposure (i.e., background exposure levels of the general population) to PFRs and adverse IVF outcomes. Future research should focus on potential interactions between PFRs and other chemicals (i.e., mixtures analysis) that adversely affect reproductive health and also explore the potential effect of PFRs on male reproductive health.

The work was supported by grants ES009718, ES022955, ES000002, and T32ES007069 from the National Institute of Environmental Health Sciences (NIEHS).

References

Carignan, C., Mínguez-Alarcón, L., Butt, C., Williams, P., Meeker, J., Stapleton, H., Toth, T., Ford, J. and Hauser, R. (2017). Urinary Concentrations of Organophosphate Flame Retardant Metabolites and Pregnancy Outcomes among Women Undergoing in Vitro Fertilization. Environmental Health Perspectives, 125(8). http://dx.doi.org/10.1289/EHP1021

Harvard. (2017). Common flame retardant chemicals may reduce likelihood of clinical pregnancy, live birth among women undergoing fertility treatments. [online] Available at: https://www.hsph.harvard.edu/news/press-releases/chemicals-flame-retardants-pregnancy/ [Accessed 31 Aug. 2017].

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GMOs Revealed - Episode 1

8/23/2017

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It’s being called “The Biggest Environmental Disaster in the History of Mankind,” but chances are you haven’t heard about it.

That’s because companies like Monsanto are making billions of dollars on genetically modified foods and the toxic chemicals they are designed to be used with, and they’d rather you not know how this affects your health and the state of the environment.

GMOs Revealed, a brand-new docu-series brought to you by an expert team of whistle-blowers determined to expose the facts about genetically modified food to as many people as possible.

This 9 part series is available FREE for a limited time to registered users, August 22nd through August 31st. Watch and share this eye-opening series and learn why it’s vital that we are aware of the real risks posed by the rise of GMOs.

It’s up to us to become educated about what GMOs are doing to our bodies and the environment.

Real change only happens when people like you and me join together to raise awareness and demand accountability.

In the opening episode, you'll meet Dr. Zach Bush. Dr. Bush is a leading expert in GMOs and a triple-board certified physician (very rare).

In Episode one, he'll bust the myth that GMOs improve our ability to feed the world more efficiently, and will explain why they instead pose a real and serious threat to human biology.

You'll be SHOCKED to know what GMOs are doing to our bodies.
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The Hazardous Reality of Sunscreen

8/2/2017

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Each time you become exposed the warm sunlight, the sun's ultraviolet radiation bombards your skin, which in moderation may optimize your health, or in excess, may lead to sunburns, rapidly aging skin, and potentially, skin cancer. To lower one's risk, many will often turn to sunscreens—sprays, lotions, and even powders—to protect their skin from the worst of the sun's effects. Unfortunately, researchers have collected data showing that you should be very cautious when choosing sunscreen to apply to your skin.
Picture
Image by fabio lf petry on Flickr
Ultraviolet radiation reaches the earth as UVA and UVB light, and has been classified as a human carcinogen by the National Toxicology Program (NTP) (National Toxicology Program, 2000). UVA is generally considered to be less carcinogenic than UVB. Originally, it was believed UVB light was more dangerous, thus sunscreen products were first developed to filter UVB and not UVA. However, recent research has demonstrated UVA radiation actually plays an important role in the development of malignant melanoma, the most aggressive form of skin cancer.

Skin Cancer on the Rise - No Proof That Sunscreen Prevents Skin Cancer

According to the National Cancer Institute, the rate of new melanoma cases among American adults has tripled since the 1970s, from 7.9 per 100,000 people in 1975 to 25.2 per 100,000 in 2014 (National Cancer Institute, 2017). A similar trend can be observed in regards to melanoma death rate for white American men, the highest risk group, which has escalated sharply, from 2.6 deaths per 100,000 in 1975 to 4.4 in 2014. From 2003 to 2012, the rates of new melanoma cases among both men and women have been increased by 1.7 and 1.4 percent per year (Centers for Disease Control and Prevention, 2016).

While the exact cause of melanoma is unknown, researchers have established that risk factors for melanoma include family history, indoor tanning, the number of moles on a person’s skin, fair skin, freckles, blue or green eyes, blonde or red hair and a history of severe sunburns, among others (Centers for Disease Control and Prevention, 2017). People are able to modify only three of these risk factors: indoor tanning, exposure to UV radiation and severe sunburns.

In December 2012, the Food and Drug Administration began to enforce new laws designed to improve sunscreens and consumer protection. The new laws restrict certain bogus label claims, but they allow most sunscreens to advertise “broad spectrum” skin protection. Sunscreen manufacturers are permitted to tell consumers, that with proper use, their products can help reduce the risk of skin cancer. However, the FDA and the International Agency for Research on Cancer have concluded that the available data does not support the assertion that sunscreens alone reduce the rate of skin cancer (Food and Drug Administration, 2011; IARC 2001).

It's Not the Sunscreen, It's the Additives

Recent research by the Center for Disease Control and Prevention found 96% of the U.S. population has oxybenzone in their bodies, a common chemical used in sunscreens; a chemical that is a known endocrine disruptor, linked to reduced sperm count in men and endometriosis in women (Environmental Working Group, 2017).

Researchers have observed that adults who put on sunscreen containing 4% oxybenzone (the US allows up to 6%) in the morning and evening—mimicking what they’d do while on vacation—continued to excrete the chemical in their urine for five days afterwards, suggesting that it was being stored in the body (Gustavsson Gonzalez, Farbrot & Larko, 2002).

Aside from oxybenzone — which is found in 70% of sunscreens — other commonly used chemicals that can enter your bloodstream and can cause toxic side effects, including hormone disruption, include but are not limited to:
Octyl methoxycinnamate (OMC)
Para-aminobenzoic acid (PABA)
Octyl salicyclate
Phenylbenzimidazole
Octocrylene
Octisalate
Dioxybenzone
Menthyl anthranilate
Homosalate
Octinoxate
Cinoxate
Parabens
Other chemicals, such as retinyl palmitate, may actually increase your risk of developing skin cancer. This product is a form of vitamin A that may speed the development of tumors and lesions when exposed to sunlight (National Toxicology Program, 2012).

It is also advised to avoid using personal care products that contain synthetic fragrance, as this term describes any number of harmful chemicals that do not have to be listed individually on the label. Some common "fragrance" chemicals include:

  • Parabens: Synthetic preservatives known to interfere with hormone production and release.
  • Phthalates: Another synthetic preservative that's carcinogenic and linked to reproductive effects (i.e., decreased sperm counts, early breast development, and birth defects) and liver and kidney damage.
  • Synthetic musks: These are linked to hormone disruption and are thought to persist and accumulate in breast milk, body fat, umbilical cord blood, and the environment.

Mineral Sunscreens May Contain Nanoparticles

Mechanical sunscreens, including zinc oxide and titanium dioxide, have proven over years of use to be safe and effective mechanisms for blocking both UVA and UVB light. According to the Environmental Working Group (EWG) - a non-profit environmental organization that specializes in research and advocacy in the areas of toxic chemicals, agricultural subsidies, public lands, and corporate accountability - sunscreens made with zinc oxide and titanium dioxide are better alternatives because they provide strong sun protection with few health concerns and they don’t break down in the sun. Zinc oxide is EWG’s first choice for sun protection. Most studies to date have shown that zinc oxide and titanium dioxide are safe and unlikely to penetrate your skin when applied topically, as long as they are not nanosized. However, in an attempt to meet the desire of their consumers for products that don't leave a thick film on the skin, some manufacturers have reduced the size of the molecules, creating nanoparticles (microscopic particles measuring less than 100 nanometers).

This nanotechnology has several different effects. Some are concerned that the particles have become so small that they may be absorbed directly into your skin. Although mixed, some studies have found significant negative health effects from the absorption of nanoparticles (European Union Public Health, 2006). While these nanoparticle technologies may make an excellent drug delivery system, it is questionable for use in sunscreen (De Jong & Borm, 2008).

Titanium dioxide is more effective in UVB range and zinc oxide in the UVA range, therefore the combination of these particles assures a broad-band UV protection (Smijs & Pavel, 2011). Zinc oxide is beneficial because it remains stable in heat, but as a nanoparticle, the problems with toxicity probably outweigh the benefits to sun protection. Upon systemic distribution, toxicity of zinc oxide nanoparticles may affect the lungs, liver, kidneys, stomach, pancreas, spleen, heart and brain (Tian et al., 2015). Findings have also demonstrated that aging has a synergistic effect with zinc oxide nanoparticles on systemic inflammation and neurotoxicity, affecting your brain and neurological system. In other words, the older you are, the higher your risk of neurotoxicity from zinc oxide nanoparticle absorption.

Spray-on sunscreens, containing zinc oxide and/or titanium dioxide, pose an additional hazard by releasing these toxic nanoparticles into the air. The FDA has previously expressed concern that inhaling these products may be risky, especially to children, and has warned parents to avoid spray-on sunscreens (Food and Drug Administration, 2006).
While these two minerals are the safest topical sunscreen agents around, inhaling them is a whole different story. When these minerals are inhaled, they have been shown to irritate lung tissues and potentially lead to serious health problems, and the finer the particles, the worse their effects appear to be (Grassian, O’Shaughnessy, Adamcakova-Dodd, Pettibone & Thorne, 2006). The lungs have difficulty clearing small particles, and the particles may pass from the lungs into the bloodstream. Insoluble nanoparticles that penetrate skin or lung tissue can cause extensive organ damage. Some researchers speculate that the toxic effects of nanoparticles relate to their size being in the range of a virus, which may trigger your body's immune response (Buzea, Pacheco Blandino & Robbie, 2007).

The International Agency for Research on Cancer (IARC) has classified titanium dioxide as a "possible carcinogen" when inhaled in high doses. According to IARC:

"Titanium dioxide causes varying degrees of inflammation and associated pulmonary effects including lung epithelial cell injury, cholesterol granulomas and fibrosis. Rodents experience stronger pulmonary effects after exposure to ultrafine titanium dioxide particles compared with fine particles on a mass basis (IARC, 2006).

The use of nanoparticles in cosmetics poses a regulatory challenge because the properties of nanoparticles may vary tremendously, depending on their size, shape, surface area and coatings. A number of manufacturers sell products advertised as containing “non-nano” zinc oxide and titanium dioxide - these claims are generally misleading. While particle sizes vary among manufacturers, nearly all would be considered nanomaterials under a broad definition of the term, including the definition proposed in 2011 by the Food and Drug Administration (Food and Drug Administration, 2011b). According to the available information, these mineral sunscreens must be delivered in nanoparticle form to render a layer that is reasonably transparent on the skin.

According to EWG, even with the existing uncertainties, zinc oxide and titanium dioxide lotions are among the best choices on the American market. Here’s why:

  • The shape and size of the particles affect sun protection.
The smaller they are, the better the SPF protection and the worse the UVA protection. Manufacturers must then find a balance: small particles provide greater transparency but larger particles offer greater UVA protection. The form of zinc oxide most often used in sunscreens is larger and provides greater UVA protection than the titanium dioxide products that appear clear on the skin.

  • Nanoparticles in sunscreen may not penetrate the skin.
Some studies indicate that nanoparticles can harm living cells and organs when administered in large doses. But a large number of studies have produced no evidence that zinc oxide nanoparticles can cross the skin in significant amounts. Researchers found that less than 0.01 percent of either form of zinc entered the bloodstream. The study could not determine if the zinc in the bloodstream was insoluble nanoparticles, therefore the European regulators concluded it was most likely zinc ions, which would not pose any health risk (Scientific Committee on Consumer Safety, 2012). However, more research should be conducted to reach definitive conclusions.

  • It is unlikely that nanoparticles in sunscreen cause skin damage when energized by sunlight.
Titanium dioxide, and to a lesser extent zinc oxide, are photocatalysts, meaning that when they are exposed to UV radiation they can form free radicals that damage surrounding cells. Nanoparticle sizes of these minerals are more affected by UV rays than larger particles. Sunscreen manufacturers commonly employ surface coatings that can dramatically reduce the potential for photoactivity, with data suggesting that they reduce UV reactivity by as much as 99% (SCCNFP..., 2000). In sunscreens, problems may arise if particles are not treated with inert coatings, if the coatings are not stable, or if manufacturers use forms of zinc oxide or titanium dioxide that are not optimized for stability and sun protection. However, tests of living skin from human volunteers and animal testing suggest that these hazards are not a concern for human safety because the free radicals that are generated by nanoparticles on skin are quenched by the skin’s own antioxidant protections (Popov et al., 2009).

Currently, all available evidence suggests that zinc oxide and titanium dioxide can be safely used in sunscreen lotions applied to healthy skin and pose a lower hazard than most other approved sunscreen ingredients.

More human studies need to be conducted in regards to the health effects of inhaling of zinc oxide particles, especially at lower levels, such as from brief exposure to sunscreen spray. However, using these spray-on products are clearly an unnecessary risk since safer options are readily available. Your safest bet is to use topical zinc oxide or titanium dioxide that does not contain nanosized particles.

High SPF is "Inherently Misleading"

In theory, applying sunscreen with a sun protection factor (SPF) of 100 would allow sunbathers to be exposed to the sun 100 times longer before suffering a sunburn. For example, an individual who would normally redden after 30 minutes in the afternoon sun could theoretically stay out for 50 hours.

But for high-SPF sunscreens, theory and reality are two different things. Researchers have observed that people are misled by the claims on high-SPF sunscreen bottles. They are more likely to use high-SPF products improperly and as a result may expose themselves to more harmful ultraviolet radiation than people relying on products with lower SPF values. The FDA has long contended that SPF higher than 50 is “inherently misleading” (Food and Drug Administration, 2007).

Here are some reasons against applying sunscreens with SPF values greater than 50:

  • Marginally better sunburn protection.
Sunbathers often assume that they get twice as much protection from SPF 100 sunscreen as from SPF 50. In reality, the extra protection is negligible. Properly applied SPF 50 sunscreen blocks 98% of UVB rays, while SPF 100 blocks 99%. When used correctly, sunscreen with SPF values in the range of 30 to 50 will offer adequate sunburn protection, even for people most sensitive to sunburn.

  • Consumers misuse high-SPF products.
High-SPF products tend to deceive users into staying in the sun longer and overexposing themselves to both UVA and UVB rays. Saturated with a false sense of security, people extend their time in the sun well past the point when users of low-SPF products would head indoors. As a result, they get as many UVB-inflicted sunburns as unprotected sunbathers and are likely to absorb more damaging UVA radiation.

Researchers have conducted numerous studies on sunbathers and have observed that high-SPF products spur “profound changes in sun behavior” that may account for the increased melanoma risk found in some studies. The researchers confirmed that European vacationers spent more total time in the sun if they were given an SPF 30 sunscreen instead of an SPF 10 product (Autier et al., 2000). It is assumed the difference would also apply to products with SPF values greater than 50.

Solutions: Sunscreen Should be the Last Resort

You can boost your internal ability to offset UVA and UVB radiation through the consumption of specific nutrients each day. Antioxidants found in colorful fruits and veggies have been shown to have protective effects, but the omnipotent nutrient here is the fat-soluble carotenoid astaxanthin (asta-ZAN-thin), which is what gives krill, salmon, and flamingos their pink color (Ambati, Moi, Ravi & Aswathanarayana, 2014).

Astaxanthin is produced by the microalgae Haematococcus pluvialis when its water supply dries up, forcing it to protect itself from ultraviolet radiation. It is this "radiation shield" mechanism that helps explain how astaxanthin can help protect you from similar radiation.

When you consume this pigment, you are essentially creating your own "internal sunscreen." Researchers have confirmed astaxanthin is a potent UVB absorber that helps reduce DNA damage, reduce inflammation, oxidative stress and free radical damage throughout your body.

Each of these health-promoting effects of astaxanthin improves the ability of your skin to handle sun without burning, while giving your body the best advantage to manufacturing vitamin D. However, it is still advised to seek physical protection from the sun, such as hat and long-sleeved clothing, but consuming more astaxanthin will provide a healthier alternative to using synthetic chemicals to filter UV radiation.
Here are some helpful tips to help protect yourself from the sun's harmful UV rays:
Wear Clothes
Shorts, hats, shorts and pants can shield you skin from the sun's UV rays, reducing sun burns by 27%
Plan Around the Sun
Go outdoors in the early morning or late afternoon when the sun is lower in the sky
Find Shade - Or Make It
Find a tree or bring a canopy
Don't Get Burned
Red, sore, blistered skin means you have gotten far too much sun exposure
Sunglasses Are Essential
Polarized sunglasses protect your eyes from the sun's harmful UV rays
Check the UV Index
The UV index provides helpful information to help you plan your outdoor activities without the risk of too much sun exposure

When Purchasing Sunscreen

Your safest and best choice for sunscreen protection is zinc oxide. However, avoid nanoparticles, which are common in spray sunscreens, to circumvent potential toxicity. Unfortunately, it can be challenging to find a product without other chemical additives. To help you choose the safest product, EWG performs an annual sunscreen evaluation based on effectiveness and safety.
EWG's Sunscreen Purchasing Guide & Safety Ratings

References

Ambati, R., Moi, P., Ravi, S., & Aswathanarayana, R. (2014). Astaxanthin: Sources, Extraction, Stability, Biological Activities and Its Commercial Applications—A Review. Marine Drugs, 12(1), 128-152. http://dx.doi.org/10.3390/md12010128

Autier, P., Doré, J.-F., Reis, A. C., Grivegnée, A., Ollivaud, L., Truchetet, F., … Césarini, J.-P. (2000). Sunscreen use and intentional exposure to ultraviolet A and B radiation: a double blind randomized trial using personal dosimeters. British Journal of Cancer, 83(9), 1243–1248. http://doi.org/10.1054/bjoc.2000.1429

Buzea, C., Pacheco Blandino, I., & Robbie, K. (2007). Nanomaterials and nanoparticles: Sources and toxicity. Biointerphases. Retrieved 3 August 2017, from https://arxiv.org/ftp/arxiv/papers/0801/0801.3280.pdf

Centers for Disease Control and Prevention. (2017). What Are the Risk Factors for Skin Cancer?. Cdc.gov. Retrieved 3 August 2017, from https://www.cdc.gov/cancer/skin/basic_info/risk_factors.htm

Centers for Disease Control and Prevention. (2016). Skin Cancer Trends. (2017). Cdc.gov. Retrieved 3 August 2017, from https://www.cdc.gov/cancer/skin/statistics/trends.htm


De Jong, W. H., & Borm, P. J. (2008). Drug delivery and nanoparticles: Applications and hazards. International Journal of Nanomedicine, 3(2), 133–149.

Environmental Working Group. (2017). EWG's 2017 Guide to Safer Sunscreens. Ewg.org. Retrieved 3 August 2017, from http://www.ewg.org/sunscreen/report/the-trouble-with-sunscreen-chemicals/#.WYKSS4UnHPp

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