Skip to content

Author: Sima

Published on Leave a comment on Do You Eat Foods With Nanoparticles In Them?

How frequently do you eat foods with nanoparticles in them? The use of nanoparticles in foods is increasing every year, with the result that people may eat foods with them daily (thus having chronic exposure). Nanoparticles in foods are ingredients so small that they are measured in nanometers or billionths of one meter.

The most common nanoparticle is the food additive titanium dioxide, which in Europe is known as E171. Titanium dioxide is added to many processed foods, candy, and even supplements  and non-prescription medicines (e.g. antihistamines) as a "coloring" to make foods whiter or brighter. Currently there are no restrictions on using titanium dioxide nanoparticles in foods.

We still know very little about whether titanium dioxide nanoparticles have health risks to humans, but studies suggest they may cause intestinal inflammation, may disrupt gut microbes, and may migrate to other parts of the body.

Now another study is raising more questions about the safety of titanium dioxide in food. It was done in mice, but the researchers feel it applies to humans. The researchers found that titanium dioxide resulted in a "pro-inflammatory environment and biofilm formation" in the intestines of the mice, and in this way could predispose humans to conditions such as inflammatory bowel disease and colorectal cancer. Bottom line: Read food ingredient lists!

From Science  Daily: Common food additive found to affect gut microbiota

...continue reading "Do You Eat Foods With Nanoparticles In Them?"

Published on Leave a comment on Almost All Americans Have Pesticide Residues In Their Bodies

Did you know that over 90% of all Americans have pesticide residues in their bodies? How do we know this? From studies and from the Centers for Disease Control and Prevention (CDC) which does biomonitoring of large groups of Americans in order to measure pesticides (and other toxic environmental chemicals) in their bodies.

Biomonitoring tells us the "body burden" of toxic chemicals, usually by measuring them in our blood and urine, but also in hair, breast milk and meconium (an infant's first feces gives a measure of prenatal exposure to pesticides). Biomonitoring studies have detected hundreds of different chemicals (including many pesticides) in people, and shown that every single person has a mixture of many contaminants in their body.

The bad news is that we don't really know what all these chronic low level mixtures of pesticides are doing to us. Studies are finding health problems (e.g. various cancers, endocrine disruption, neurological and reproductive problems, even semen quality) with pesticide exposures - especially during pregnancy (the developing fetus), and during childhood. We're talking about pesticide exposures of ordinary people, living ordinary lives, in cities, suburbs, and rural areas.

How do pesticides get into us? Pesticides get into us from inhalation, through the skin, and through ingestion (foods, water).

Studies find that conventionally grown fruits and vegetables are good ways to ingest pesticides, and with more of these foods eaten, the higher the pesticide residue levels in the body. Unfortunately, as more and more pesticides such as fungicides, glyphosate and 2,4-D are used on crops, our exposures and levels of these pesticides in our bodies are increasing.

When our homes, our gardens, and lawns are treated with pesticides, we also get exposed to pesticides. We track them from the outside, and children (and pets) play in them on treated lawns. We are exposed to pesticide "drift" from neighboring properties. Pesticides used inside the house stay in the house dust (they don't break down easily in homes). Pesticides are even found in rain and fog. Scary, isn't it?

Can we lower the levels of pesticides in our bodies? Absolutely yes. Eat as many organic foods as possible - the levels of pesticide residues in the body (as measured in the blood and urine) will go down rapidly. Study after study shows this. A study even found an association with eating organic foods and a lower cancer rate. Don't use pesticides on lawns. Think of weeds as "native grasses" and clover as beneficial. When dealing with indoor pest problems, use least-toxic Integrated Pest Management.

A nice discussion of this is in a recent article by journalist Liza Gross. Excerpts from The Nation: More Than 90 Percent of Americans Have Pesticides or Their Byproducts in Their Bodies

...continue reading "Almost All Americans Have Pesticide Residues In Their Bodies"

Published on Leave a comment on Add Cherries To Your Diet

Another study finds beneficial health effects from eating real foods - this time eating Montmorency tart cherries reduces blood pressure and insulin levels up to 5 hours after ingestion. Of course. It was a small study done in the United Kingdom, with only 11 middle-aged participants, all with metabolic syndrome (increased blood pressure, high blood sugar, excess body fat around the waist, and abnormal cholesterol or triglyceride levels). It is estimated that about a third of U.S. adults have metabolic syndrome, which significantly increases the risk of cardiovascular disease and type 2 diabetes.

It was a nicely designed study, and the Montmorency tart cherries were taken in either juice form or capsules which contained freeze-dried Montmorency tart cherry powder. Drinking the juice had slightly better health effects than the freeze dried capsules. It would have been nice if they had also looked at a group of people eating fresh Montmorency tart cherries, rather than just juice or freeze dried cherries.

Keep in mind that this study found positive health effects from real food. However, in contrast, studies find that taking supplements and vitamins generally don't result in health benefits (e.g. calcium, omega-3, niacin, antioxidants), and can even cause harm - unless one has a nutritional deficiency. Studies also don't find that there are "superfoods" - instead, what is beneficial or not is the overall dietary pattern. Studies show that a diet rich in fruits, vegetables, whole grains, nuts, seeds, and legumes has many health benefits (something along the line of the Mediterranean dietary pattern). Try to eat a variety of fruits and vegetables - each has different micronutrients, and even different microbes (good!). Eating that way also results in a high fiber intake, which has many health benefits.

From EurekAlert!: Montmorency tart cherries may provide benefits for adults with metabolic syndrome

Montmorency tart cherries reduced systolic blood pressure, insulin levels and insulin concentrations in adults with metabolic syndrome participating in a small pilot study published in the Journal of Functional Foods.  ...continue reading "Add Cherries To Your Diet"

Published on Leave a comment on Sunscreen Chemicals Enter the Bloodstream

A recent study found that within hours of applying sunscreen, the chemicals in the sunscreen appear in the person's blood - and at levels high enough to be of concern. Of course the chemicals enter the body! Why is anyone surprised? Generally, assume that what you put or get on your skin enters your body - lotions, pesticides, etc.

The small study was conducted by the Center for Drug Evaluation and Research, which is a part of the US Food and Drug Administration (FDA). Commonly available sunscreens (2 different sprays, a lotion, and a cream) were applied on 24 volunteers according to directions. Within hours the four sunscreen ingredients being studied (avobenzone, oxybenzone, ecamsule and octocrylene) had entered the bloodstream at levels high enough to cause concern.  They also found that the blood concentration of three of the ingredients continued to rise as daily use continued and then remained in the body for at least 24 hours after sunscreen use ended.

The four chemicals studied are among a dozen chemicals that the FDA recently said needed to be researched by manufacturers before they could be considered "generally regarded as safe and effective." Especially worrisome is oxybenzone, which is in 85% of chemically based sunscreens - and has also been found in breast milk, amniotic fluid, urine, and blood. It is an endocrine disruptor, and linked to various health problems. With these chemicals, the more one uses, the more gets into the body - and people may apply sunscreen several times a day. They may also be found in personal care products and cosmetics. But unfortunately, as with so many chemicals that we are exposed to - long-term effects of frequent or chronic exposure are unknown.

The Environmental Working Group (EWG) rates sunscreen chemicals and is an excellent resource in finding safe sunscreens, as well as those that should be avoided. The EWG has a page discussing the problems with these chemicals, including that they are endocrine disruptors. They also have a page on nanoparticles (typically zinc and titanium dioxide), which are also used in sunscreens.ided. The EWG has a page discussing the problems with these chemicals, including that they are endocrine disruptors. They also have a page on nanoparticles (typically zinc and titanium dioxide), which are also used in sunscreens.

...continue reading "Sunscreen Chemicals Enter the Bloodstream"

Published on Leave a comment on Could Antibiotics treat Endometriosis??

Could this be true for humans - that antibiotics can treat endometriosis? A nicely done series of studies found that treatment with the antibiotic metronidazole reduced both early growth and progression of endometrial lesions. Also, the researchers found microbiome (community of microbes) differences in endometriosis vs healthy  subjects. The researchers felt that the research results suggest that gut bacteria promote endometriosis progression, and that the antibiotics worked to stop the progression of endometriosis because it reduced specific gut bacteria.

Endometriosis is a chronic condition causing abdominal pain and infertility and afflicts up to 10% of women between the ages of 25 and 40. Unfortunately, current treatments , including hormone therapy and surgery, have serious side effects and do not prevent recurrences. So a study finding another treatment approach is exciting. But...before everyone gets too excited, keep in mind that the series of studies were done in mice, but... the researchers of the study are optimistic that this could be true for women also. And yes, the Washington University School of Medicine (in St. Louis, Missouri) researchers are going to  conduct a large clinical trial to test the antibiotic metronidazole in women with endometriosis.

From Medical Xpress: Antibiotics may treat endometriosis

Researchers at Washington University School of Medicine in St. Louis have found, in mice, that treatment with an antibiotic reduces the size of lesions caused by endometriosis. The researchers are planning a large, multicenter clinical trial to test the drug metronidazole in women who have the painful condition.  ...continue reading "Could Antibiotics treat Endometriosis??"

1

Published on 1 Comment on Exposure to Pets in Infancy Reduces the Risk of Allergies

Study after study is finding that having pets in early childhood or living on a farm with lots of exposure to animals is associated with a lower incidence of allergies. Pets with all their "germs" (bacteria and other microbes) appear to have beneficial effects on children's developing immune systems. One study from the Univ. of Gothenburg (in Sweden) actually found that the more pets a child lives with in the first year of life, the lower the incidence of later allergies in children. The results were dose-dependent - with each additional pet, the incidence of allergies is a little lower.

The numbers are amazing - allergies decreased from 49% in those with no pets to zero in those with five or more pets. The researchers suggest that there is  a “mini-farm” effect, with exposure to a number of cats and dogs protecting against all allergy development (animal, food, and pollen allergies). What an about face in medical views in a few decades! It used to be viewed that if you wanted to prevent allergies in children, then avoid pets such as dogs and cats. Hah!

From Medical Xpress: Pet-keeping in early life reduces the risk of allergy in a dose-dependent fashion

A team of researchers at the University of Gothenburg has found that when infants live with pets, they grow up to have fewer allergies and other diseases. In their paper published on the open access site PLOS ONE, the group describes their study of datasets that held information on children's health and whether they had lived with pets as infants, and what they found.  ...continue reading "Exposure to Pets in Infancy Reduces the Risk of Allergies"

Published on Leave a comment on Is A Poor Sense of Smell In Older Adults A Sign of Deteriorating Health?

A number of studies have found that a poor sense of smell in older adults is linked to health problems (especially Parkinson's disease and dementia) and death. Now a recent study found that a poor sense of smell in older adults is associated with an almost 50% increase in their risk of dying within 10 years—especially in individuals reporting good health. In other words, a poor sense of smell is an early sign of deteriorating health, even when it is not apparent yet to the person.

Researchers at  the Michigan State Univ. College of Human Medicine  followed 2,289 persons (aged 71 to 82) for 13 years. The generally healthy persons took a smell test of 12 common odors (e.g. onion, soap, gasoline, lemon, chocolate and rose) at the start of the study, and were scored as having good, moderate, or poor sense of smell. After 13 years 1,211 of them had died. The researchers then looked to see if there was any association between scores on the smell test and their risk of death at various points over the 13 years.

No association was found at the three- or five-year mark of the study. But those with a poor sense of smell had a 46 percent higher risk of dying by 10 years and a 30 percent higher risk by 13 years, when compared with the older adults with a good sense of smell. The researchers believe the risk was lower at 13 years because so many of the participants had already died - whether their ability to smell was initially good or poor. So how to interpret the study results? It appears that a poor sense of smell may be a sensitive early sign of deteriorating health, even when it is not apparent yet.

From Medical Xpress: Poor sense of smell associated with nearly 50 percent higher risk for death in 10 years  ...continue reading "Is A Poor Sense of Smell In Older Adults A Sign of Deteriorating Health?"

Published on Leave a comment on Time Restricted Eating Improves Blood Glucose Levels

There has been a lot of excitement over intermittent fasting and eating only during restricted time periods each day in order to lose weight and improve health. But does it really improve health? A recent study adds support to health benefits from eating only during a 9 hour restricted time period, so as to extend the "fasting" time to 15 hours each day. The researchers found that 18 overweight men at high risk for type 2 diabetes had improved glycemic control and glucose responses to a meal after 1 week of time restricted feeding (TRF).

They also lost a little weight and had a reduction in triglycerides. Which are great results, especially because the men ate normally during the 9 hour eating time. Improve health while eating all meals!

From Medical Xpress: Time-restricted eating shows benefits for blood glucose

By restricting the time period during which they could eat, researchers have seen promising results for controlling blood glucose levels in men at risk of type 2 diabetes.  ...continue reading "Time Restricted Eating Improves Blood Glucose Levels"

Published on Leave a comment on Link Between Antibiotics, Heart Attacks, and Stroke Risk In Older Women

Many, many people wind up taking numerous courses of antibiotics at some points in life. Think of recurrent sinus infections or urinary tract infections or other infections. Or some conditions (e.g. dental or skin conditions) are treated with really long courses of antibiotics  New research (from 36,429 women participating in the long-running Nurses' Health Study)  found that women who take antibiotics over a long period of time during middle-age (40 to 59 years old), but even more so in late adulthood (60 years and over), are at increased risk of heart attack or stroke within the next 8 years.

How increased a risk for cardiovascular diseas? 28% or higher risk (compared to those who didn't take antibiotics)! But looking at the actual numbers it means: Among women who take antibiotics for two months or more in late adulthood, six women per 1,000 would develop a cardiovascular disease, compared to three per 1,000 among women who had not taken antibiotics.

Eight years was the length of the study, so it is unknown if the increased risk persists longer. The authors give a number of possible reasons for these results, but think it might be because antibiotic use results in gut microbial alterations. And the longer the antibiotic use, the more persistent the gut microbiome (microbial community) alterations. Other research studies supports this link (antibiotic use - gut microbe disruptions - increased cardiovascular disease). Another reason to eat in as healthy a manner as possible to feed beneficial gut microbes: a diet rich in fruits, vegetables, whole grains, seeds, and nuts.

From Medical Xpress: Antibiotic use linked to greater risk of heart attack and stroke in women

Women who take antibiotics over a long period of time are at increased risk of heart attack or stroke, according to research carried out in nearly 36,500 women. The study, published in the European Heart Journal today, found that women aged 60 or older who took antibiotics for two months or more had the greatest risk of cardiovascular disease, but long duration of antibiotic use was also associated with an increased risk if taken during middle age (aged 40-59). The researchers could find no increased risk from antibiotic use by younger adults aged between 20-39.  ...continue reading "Link Between Antibiotics, Heart Attacks, and Stroke Risk In Older Women"

Published on Leave a comment on Light Physical Activity Is Beneficial to the Brain

Great news for those who don't exercise at government recommended guideline levels of 150 minutes of moderate to vigorous activity per week. Which may be most of us, perhaps? Hmmm? A recent study found that even light intensity exercise is beneficial to the brain.

The study of 2354 persons (average age 53 years) in Framingham, Massachusetts, found that each additional hour spent in light-intensity physical activity was associated with a larger brain volume - equivalent to approximately 1.1 years less brain aging. Thus, the more activity, the more beneficial. In general, total cerebral brain volume declines at a rate of 0.2% per year after age 60 years - so slowing this process down is desirable.

Both physical activity levels and steps per day was looked at, and both were beneficial to brain volume. The study found that walking 10 ,000 or more steps per day was associated with higher brain volume when compared with persons who walked fewer than 5000 steps per day. But even 7500 steps was better for the brain than 5000 steps. How did they measure brain volume? With brain MRI imaging. 

This study found that light exercise is beneficial to the brain, specifically the brain volume - but note that these benefits are from levels below official recommended guidelines. The US Department of Health and Human Services (HHS) 2018 Physical Activity Guidelines for Americans state that 150 or more minutes of moderate to vigorous physical activity (MVPA) per week is recommended for substantial health benefits (but they also said that "some physical activity is better than none"). In other words, get off your butt and move - any activity and exercise is better than none!

From Science News: Light, physical activity reduces brain aging

Incremental physical activity, even at light intensity, is associated with larger brain volume and healthy brain aging.  ...continue reading "Light Physical Activity Is Beneficial to the Brain"