"Dr. Hyman, I've heard so much contradictory information about omega 3 fats," writes this week's house call. "Some studies show they help everything while others argue they don't do much of anything. What's the real story here?"
As I often say, food is information, not just calories. Food influences gene function, hormones, your immune system and even your gut flora. Literally, food controls every function within your body.
This is especially true with the omega-3 fatty acids found in foods like wild fish, flaxseeds and walnuts.
These fatty acids play critical roles in cognitive development and learning, visual development, immune strength, fighting inflammation, pregnancy, brain health and preventing Alzheimer's disease, heart disease, cancer, mental illness and so much more. They affect every one of your hundred trillion cell membranes.
In fact, a recent and the most comprehensive review on omega 3 fats looked at 19 studies from 16 countries (including 45,637 participants) and found that those with the highest levels of omega 3 fats in their blood had lower risks of heart attacks.
Makes sense how not getting sufficient amounts of these crucial fatty acids can profoundly affect your health.
Do Omega 6 Fats Make Us Depressed and Violent?
At a nutrition conference once, I heard Dr. Joseph Hibbeln, the scientist in nutritional neurosciences at the National Institutes of Health, present some startling data about how omega 3 fats impact mental health.
Dr. Hibbeln said soy oils and seed oils contain high amounts of inflammatory linoleic acid that create inflammation and disease.
He noted 80 percent of the fats that Americans eat are inflammatory omega 6 fats, while just 20 percent come from the anti-inflammatory omega 3 eicosapentaenoic acid (EPA). (For the record, I would suggest that even less than 20 percent comes from EPA).
In Japan, that number is reversed: 80 percent of their fats come from EPA, while only 20 percent are inflammatory omega 6 fats.
Over the last century in the U.S., we have witnessed a 1,000-fold increase in soy oil consumption. About 10 to 20 percent of our calories come from soybean oil rather than omega 3 fats and other, healthier fats we should be consuming.
The omega 6 fats aren't the ones our ancestors ate. Human evolution occurred in an environment where seafood and wild animal fat was the predominant source of dietary fat.
Our hunter-gatherer ancestors ate no seed oils. Obviously, they weren't eating French fries, donuts and the zillion Frankenfoods products that contain these oils. These refined oils create and exacerbate inflammation, which contributes to nearly every disease and makes us fat.
Beyond that, the repercussions are dramatic and far-reaching. Disturbing recent research shows homicide in the United Kingdom increased dramatically with increased consumption of linoleic acid-rich soybean oil.
The same thing happened in the U.S., Australia, Canada and Argentina. Interestingly, homicide mortality rates become inversely related to seafood consumption, meaning societies who eat more seafood have lower homicide rates.
Equally dramatic, one study published in the British Journal of Psychiatry gave one prison group recommended daily amounts of vitamins, minerals and omega 3 fats, while the other group maintained their regular diet and lifestyle. Researchers found reduced felony level violent offenses among prisoners who took omega 3 supplements.
In fact, providing vitamin and fish oil supplements reduced felony-related violent crime among the prisoners by 37 percent.
The Cure for Depression, ADD and Dementia—Is it More Fat?
More fat to cure brain maladies makes sense when you consider omega 3 fats affect how we think and behave. Research even shows omega 3s help treat depression, including postpartum depression.
The omega 3 docosahexaenoic acid (DHA), a critical part of mother's milk, helps the fetus's neurologic development. Studies show women who have higher levels of omega 3 fats, specifically DHA, have lower rates of postpartum depression.
Omega 3 deficiencies also affect our children. Young kids with dyslexia, dyspraxia (difficulty writing), learning disabilities and attention deficit disorder (ADD) are often omega 3 deficient.
The neurotransmitter dopamine, critical for brain function in children, becomes higher when these children consume essential fatty acids. Controlled studies show fish oil improves reading, spelling and conduct because the nervous system depends on these fats to function.
I could go on, but I hope you can understand evidence overwhelmingly supports that omega3 fats are critical to improve mood, mental functioning, metabolism and so much more.
If you're curious to learn more, please check out my book Eat Fat, Get Thin, in which I show you how to effortlessly incorporate more omega 3s and other healthy fats to lose weight and get healthy.
Thankfully, emerging research proves how vital healthy fats are. The outdated "eating fat makes you fat" paradigm has shifted to a new, more accurate understanding of dietary fat as evidence shows some fats are essential for optimal health.
Yet we're not quite there yet. Unfortunately, about 90 percent of Americans are deficient in omega 3s. We're eating too many omega 6s and not enough omega 3s. That imbalance of omega 3 fats to omega 6 fats predicts your risk of:
- Heart disease
- Type 2 Diabetes
- Neurological problems
- Attention Deficit Disorder
- Skin problems
- Autoimmune disease
Chronic disease will only increase as we move further away from the diet of our ancestors, which consisted of omega 3 rich protein (wild, grass-fed animals and wild fish), a healthy ratio of omega 3 to omega 6 fats and mostly plant foods.
We've gone way off course with the way our ancestors ate. Big food companies have hijacked our taste buds and our biology.
Yet there's hope. Science shows when you eat the right kinds of fat, you get thin, decrease inflammation and reverse heart disease, type 2 diabetes and many of the other chronic diseases that plague us. You can take control of your health and destiny, starting with your very next meal!
To do that, check out my Eat Fat, Get Thin Challenge, a revolutionary science-based eating program that focuses on healthy fats to reset hormones, take back your biochemistry, effortlessly allow you to end your cravings, lose weight and reverse disease.
For now, let's establish some key facts about fats:
1. Sugar, not fat, makes you fat. Sugar spikes insulin—the fat fertilizer hormone laying the foundation for belly fat. Sugar also slows your metabolism and is addictive and makes you hungry (all the time!). Fat actually speeds up metabolism, cuts hunger and increases fat burning. Boy, did we get this wrong during the low-fat diet era!
2. Dietary fat is very complex. We have saturated, monounsaturated, polyunsaturated and trans fats. And we have subcategories within each group. Some fats are good and yes, some are bad. Remember that quality matters; that food is information. To learn more, check out Eat Fat, Get Thin.
3. Low-fat diets claim to be heart-healthy but aren't. Low-fat diets typically tend to be higher in sugar. Eating less fat and more sugar and refined carbs floods our system with insulin, creating inflammation, heart disease and many other problems. When you consume lots of sugar and refined carbs, your body produces dangerous, artery-clogging small, dense LDL cholesterol particles; drops your protective HDL and increases harmful triglycerides. That's a bad combo just begging to bring on a heart.
4. Saturated fat is not a "bad" fat. A review of all the research on saturated fat published in the American Journal of Clinical Nutrition found no correlation between saturated fat and heart disease. I am not advising eating sticks of butter every day; however, saturated fat is not the boogeyman we once thought. The problem arises when we eat them with sugar and starch (sugar, flour, white rice and potatoes), because then they are deadly. Basically, think no sweet fat.
5. Some fats are unhealthy. Trans fats and inflammatory vegetable oils are bad fats that cause free radical damage and create a perfect storm for inflammation. Most restaurants cook with toxic oils because they're cheap and marketed as heart-healthy, low-cholesterol fats.
6. We all need more omega 3 fats. Most Americans are deficient in these health-crucial fats. The best ways to include them in your diet are to include wild or sustainably raised cold-water fish and pastured or omega 3 eggs and taking a quality, toxin-free omega 3 rich fish oil supplement.
7. Eating fat makes you lean. The right fats can nourish your cells to better utilize insulin. Healthy fats also help to stop your cravings, curb your hunger and reset your hormones to help your body burn fat more efficiently.
8. Your brain is made up of mostly fat. About 60 percent of your brain is fat, mostly as DHA, which your cells need to communicate. Quality omega-3 fats improve cognition, memory and mood. Research shows omega 3 deficiencies increase depression, anxiety, Alzheimer's and bipolar disorder.
To get and stay healthy, eat quality fat at every meal. The right fats improve your skin, hair, nails and mood. They protect against type 2 diabetes, dementia, cancer and inflammation.
Some of my favorite top-quality fats include:
- Seeds: pumpkin, sesame and chia, flax and hemp—all of which contain omega 3 fats
- Fatty fish, including sardines, mackerel, herring and wild salmon that are rich in omega 3 fats
- Nuts: walnuts, almonds, pecans, macadamia; but not peanuts (One study showed a handful of nuts a day reduced death from all causes by 20 percent)
- Extra-virgin olive oil
- Grass-fed or sustainably raised animal products (which have more omega 3 fats than feedlot beef)
- Extra-virgin coconut butter, which is a great plant-based source of saturated fat that fuels your mitochondria, is anti-inflammatory and helps optimize cholesterol.
EcoWatch Daily Newsletter
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By Jason Bruck
Human actions have taken a steep toll on whales and dolphins. Some studies estimate that small whale abundance, which includes dolphins, has fallen 87% since 1980 and thousands of whales die from rope entanglement annually. But humans also cause less obvious harm. Researchers have found changes in the stress levels, reproductive health and respiratory health of these animals, but this valuable data is extremely hard to collect.
Researchers work with trained dolphins to learn more about their sensory abilities, seen here testing a dolphin's hearing. Jason Bruck / CC BY-ND
A Lot to Learn From Hormones<p>When sampling the blow, we are looking for hormones in mucus as these can be used to gauge psychological and physiological health. We are specifically interested in <a href="https://dx.doi.org/10.1371%2Fjournal.pone.0114062" target="_blank">hormones like cortisol</a> and <a href="https://doi.org/10.1016/j.ygcen.2018.04.003" target="_blank">progesterone</a>, which indicate stress levels and reproductive ability respectively, but can also help determine overall health.</p><p>Additionally, blow samples can detect <a href="https://dx.doi.org/10.1128%2FmSystems.00119-17" target="_blank">respiratory pathogens</a> in the lungs or nasal passages - blowholes evolved from noses after all.</p><p>This health analysis is especially important in areas with oil spills as the chemicals can cause hormonal problems that harm <a href="https://www.carmmha.org/investigating-how-oil-spills-affect-dolphins-and-whales/" target="_blank">development, metabolism and reproduction</a> in dolphins.</p><p>Hormone samples can provide scientists with valuable data, but collecting them from intelligent and unpredictable animals is challenging.</p>
Cetacean Collaborators<p>To build a drone that can stealthily collect spray from moving dolphins, we needed more data on their eyesight and hearing, and this is data that couldn't be collected in the wild nor simulated in a lab.</p><p>We worked with dolphins at facilities like Dolphin Quest in Bermuda, which provides guests opportunities to learn about dolphins while allowing <a href="https://dolphinquest.com/about-us/our-story/" target="_blank">scientists access to animals for noninvasive research</a>. Here the dolphins can swim away if they choose not to work with us, so we had to design the study like a game; the way a kindergarten teacher entertains a class. If the dolphins aren't interested, we don't get to do the science.</p><p>Over the course of hundreds of sessions, we sought to answer two questions: What can dolphins hear and what can they see around their heads?</p><p>To test dolphin hearing, we set up microphones and cameras to record dolphin behavior as we played drone noise in the air. We analyzed the responses to each noise – such as how many dolphins looked at the speaker – and used these as a proxy for their ability to hear the sounds.</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="5f31daf07a652b8d64a093b993ee4e96"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/UjmQeH3vXHI?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Robodolphin doesn't look like a real dolphin, but it doesn't need to in order to train our drone pilots. C.J. Barton / Oklahoma State University / CC BY-ND<p>To build robodolphin, we worked with dolphins trained to "chuff" or sneeze on command to measure spray characteristics. We used high-speed photography to see the dolphins' breath as it moved through the air. Then we conducted high resolution CT scans of a dolphin head and 3D-printed a replica of a nasal passage.</p><p>Now, we have a complete robodolphin and are tweaking its sprays to be nearly identical to the real thing. This will allow us to determine how close we need to get to collect the samples, and therefore, how quiet our drone needs to be.</p>
The replica dolphin blowhole was designed from a scan of a real blowhole passage, and the spray it produces closely matches the real thing. Alvin Ngo, Mitch Ford and CJ Barton / Oklahoma State University / CC BY-ND
A Bit of Practice, Then Into the Wild<p>In the next few months, we will test flights over robodolphin with existing drones to determine the timing and strategy for collection. From there, we will fabricate a low-noise drone that can fly fast enough and with sufficient maneuverability to capture samples from wild dolphins. Like a video game, we will use the visual field data to develop approach trajectories to stay in the visual blindspots.</p><p>We plan to test our drones on a truck-mounted robodolphin moving down a runway, then using a boat to simulate realistic conditions. The next steps will involve ocean testing with dolphins trained for open ocean swimming. These tests will determine if our devices can catch and hold the hormones as the drone flies back to a researcher's boat.</p><p>Finally, we will deploy the system to collect data on wild dolphins. Our first goal is to test resident dolphins – animals that live on the coasts and deal directly with boat and oil industry noise – which will allow us to learn more about stress resulting from human impacts.</p><p>Those samples are a way off, but if all goes well we will have a specially built drone capable of flying long distances and capturing samples undetected in a few years. The samples collected will allow researchers to do better science with impact on the animals they study.</p>
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Billions worth of valuable metals such as gold, silver and copper were dumped or burned last year as electronic waste produced globally jumped to a record 53.6 million tons (Mt), or 7.3 kilogram per person, a UN report showed on Thursday.
Environmental and Health Hazard<p>Experts say e-waste, which is now the world's fastest-growing domestic waste stream, poses serious environmental and health risks.</p><p>Simply throwing away electronic items without ensuring they get properly recycled leads to the loss of key materials such as iron, copper and gold, which can otherwise be recovered and used as primary raw materials to make new equipment, thereby reducing greenhouse gas emissions from extraction and refinement of raw materials.</p><p>Refrigerants found in electronic equipment such as fridge and air conditioners also contribute to global warming. A total of 98 Mt of CO2-equivalents, or about 0.3% of global energy-related emissions, were released into the atmosphere in 2019 from discarded refrigerators and ACs that were not recycled properly, the report said.</p><p>E-waste contains several toxic additives or hazardous substances, such as mercury and brominated flame retardants (BFR), and simply burning it or throwing it away could lead to serious health issues. Several studies have linked unregulated recycling of e-waste to adverse birth outcomes like stillbirth and premature birth, damages to the human brain or nervous system and in some cases hearing loss and heart troubles.</p><p>"Informal and improper e-waste recycling is a major emerging hazard silently affecting our health and that of future generations. One in four children are dying from avoidable environmental exposures," said Maria Neira, director of the Environment, Climate Change and Health Department at the World Health Organization. "One in four children could be saved, if we take action to protect their health and ensure a safe environment."</p>
Europe Leads the Way<p>While most of the e-waste was generated in Asia (24.9 Mt) in 2019, Europe led the charts on a per person basis with 16.2 kg per capita, the report said.</p><p>But the continent also recorded the <a href="https://www.dw.com/en/the-eu-declares-war-on-e-waste/a-51108790" target="_blank">highest documented formal e-waste collection and recycling</a> rate at 42.5%, still below its target of 65%. Europe was well ahead of the others on this front. Asia ranked second with 11.7%.</p><p>The authors said while more that 70% of the world's population was covered by some form of e-waste policy or laws, not much was being done toward implementation and enforcement of the regulations to encourage the take-up of a collection and recycling infrastructure due to lack of investment and political motivation.</p><p>"You have to think about new economic systems," said Kühr.</p><p>One approach could be that consumers no longer buy the products, but only the service they offer. The device would remain the property of the maker, who would then have an interest in offering his customers the best service and the necessary equipment. The maker would also be interested in designing his products in such a way that they are easier to repair and easier to recycle, Kühr said.</p>
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