Tag: health

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Learning more about your genes can help you cut through all the confusion about nutrition and give you actual data to work with. Here’s what I learned about my own health markers and genetic risks after having analysis done.

 

If I drink coffee or tea before drinking fresh orange juice, I develop some odd symptoms. My face gets very warm and flushed. I feel feverish. My throat feels hot, sore, and tight. I suddenly feel very tired. Sometimes I get headaches and nausea, too. The reaction feels similar to an allergic one, but it isn’t quite the same. I noticed the reaction consistently occurred when I consumed coffee before citrus fruit or homemade juice, so I decided to switch the order. Guess what? No more reactions. As long as I don’t have coffee or tea before citrus fruit, I am fine. Reverse the order, and I am miserable for the rest of the day.

I really wanted to know the root cause of this bizarre set of symptoms. Exactly what the heck was going on in my body to cause such a severe and genuinely uncomfortable response?

A trip down the internet rabbit hole via a search of my strange symptoms led me to a website called Gene Food. I’ve been hooked on the site ever since. Nutrigenomics is a truly fascinating field of science, and I believe it has a lot of potential for helping people prevent chronic illness and serious disease.

Note: This article contains affiliate links. After ordering a custom nutrition report and spending a lot of time reading articles on the Gene Food website, we were so impressed that we decided to join their affiliate program. This means that if you click on the links in this article and make a purchase from Gene Food, All About Habits may earn a commission. This does not increase the cost of the product for you, nor does it diminish the quality of the product – it just helps fund this site so we can keep providing information to you free of charge. 

My unusual symptoms are likely linked to some genetic risk factors I have.

The Gene Food site revealed the probable culprit behind my strange symptoms: I likely have a condition called histamine intolerance.

I decided to upload my raw DNA file from Ancestry.com to Gene Food to see if I have any genetic markers (also commonly referred to as “SNPs”, “risk alleles” or “variants”) for histamine issues.

Two days after placing my order, I received my report.

As it turns out, I do have risk alleles for histamine intolerance (and a few other things I will talk about later in this article).

Here’s a screenshot from my custom nutrition plan from Gene Food:

Now, histamine intolerance is a complex issue that deserves its own article (and I am planning to write one about it very soon), but, long story short…coffee and tea (and many other foods and drinks) can block an enzyme called Diamine Oxidase (DAO for short). DAO plays a role in histamine clearance. If DAO is blocked, histamine can build up in the body and cause uncomfortable symptoms.

As you can see in the image above, I carry one copy of the risk allele for AOC1 (as indicated by the yellow +/- box). According to Gene Food’s AOC1 page:

The risk ‘T’ allele of C47T in the AOC1 gene is associated with reduced DAO activity and histamine intolerance. For those carrying a single copy of the risk ‘T’ allele, DAO activity was reduced. Whereas for those carrying two copies of the ‘T’ allele DAO activity and expression was reduced. This suggests that the ‘T’ allele is associated with reduced expression of DAO rather than changes in its activity.

Therefore, those carrying the ‘T’ allele of C47T may be at risk of developing symptoms associated with histamine intolerance such as anxiety, body temperature issues, diarrhea, headaches, low blood pressure, flushing along with inflammation and irritation.

And, as you can see in the screenshot above, I have TWO copies of the risk allele for HNMT (as indicated by the red +/+ box). Gene Food’s HNMT page explains what this means:

Histamine N-methyltransferase (HNMT) is an enzyme that breaks down histamine and is encoded for by the HNMT gene.

Histamine plays an important role in the immune response, in particular, allergic responses. In health, histamine is released from immune cells (known as mast cells) resident in the skin, gut or lungs when a pathogen or allergen is detected. Histamine then generates three standard physiological responses:

Firstly, blood vessels are dilated to allow other immune cells to quickly reach the area where the pathogen was detected.

Secondly, smooth muscle contracts, which is thought to be a protective measure limiting other pathogens entering the body.

Finally, mucus-secreting cells are stimulated, for example in the nose or gut, to protect against further pathogens reaching tissue. In health, histamine is then quickly degraded by HNMT and the immune system clears the pathogen.

As its name suggests HNMT functions by transferring a methyl group onto histamine, inhibiting its function; with HNMT using S-adenosyl-L-methionine (SAM) as a methyl donor. This inhibited histamine can then be excreted from the body.

There is one SNP in the HNMT gene which is associated with poor health outcomes, rs11558538 or C314T.

DAO and HNMT are enzymes that break down (or metabolize) histamine. So, it appears that sometimes when I drink coffee, DAO and HNMT are blocked from doing their jobs, which in turn leads to unpleasant symptoms related to a buildup of histamine in my body. I say sometimes because histamine levels in the body can fluctuate quite a bit.

Since learning about histamine intolerance and my genetic risk factors, I’ve stopped consuming coffee before having citrus fruit. Most of the time, this works – but I have found that sometimes even coffee alone causes what feels like a histamine intolerance reaction. In the article Caffeine Allergy & Coffee Intolerance: What You Need to Know, Dr. Tania Dempsey, a Mast Cell Activation Syndrome (MCAS) expert, explains the likely reason:

Coffee is high in histamine which can set off what looks like an allergic reaction but it doesn’t occur through the typical allergy mechanism. Instead, the histamine from the coffee causes an inflammatory reaction that can be quite severe in some people. Histamine can cause a variety of symptoms, many of which overlap with symptoms related to intolerance or allergy to coffee, such as hives, rashes, shortness of breath, palpitations, abdominal pain, and many more. Some people are more sensitive to the effects of histamine in food and many of them have a condition known as mast cell activation syndrome, which in itself can lead to an increase in the amount of histamine in the body.

That’s enough about histamine intolerance for now. I’ll write a more in-detail article about it soon.

Gene Food provides personalized nutrition recommendations.

I’ll share a little information from my custom nutrition plan shortly, but first I want to tell you more about Gene Food.

On the Gene Food Start Here page, the company founder describes its mission:

We created Gene Food as a launching off point for people on a mission to find what works best for them when it comes to health and nutrition.

You could almost think of us as the referee for the diet wars.

We don’t advocate for any one diet.

We don’t sell supplements.

Instead, we created an algorithm that divides people into 20 different diet types based on their genetics. While we recognize genetics aren’t the whole story, lifestyle plays a big role as well, we see genetics as the foundation upon which we can each build our own “wellness house.”

Here are a few excerpts from the About page:

For generations, Americans have ping-ponged back and forth between different fad diets. Each new wave of research brings with it a new way of eating. We’re told fat is dangerous, eat more whole grains. Now we’re in the midst of another movement towards fat, with a greater emphasis on the dangers of sugar. Some advocate for the exclusion of all plant foods in favor of a carnivore diet. Others tout the benefits of beans and whole plant foods as enhancing longevity. Book after book is published telling all Americans how to eat.

While the nutrition wars rage on, a new and growing body of science is teaching us that there is no one size fits all when it comes to diet.

Our mission at Gene Food is to anticipate an individual’s response to a given diet and then assign them to a diet type that will work for them.

Gene Food’s resident geneticist, Dr. Aaron Gardner, created a scoring system that places people into one of twenty dietary categories based on how well they metabolize fats, carbohydrates, sugars, histamine, dairy and more. Individuals that are more likely to fall into the 107% increase in bad cholesterol group we saw in the Retterstøl study are assigned to a diet type that is more plant-based. By contrast, individuals estimated to have greater ability to deal with a higher saturated fat diet are placed in a diet type that allows for a greater percentage of calories to come from fat. In addition to the broad diet categories, Gene Food’s system scores people for micronutrient balance, sterol absorption, LDL, genes, methylation strength and more. Each gene we report on is assigned a Science Grade, which gives our readers and customers the opportunity to see what the state of the research is for a given gene. Gene with a higher Science Grade are backed by more research, lower Science Grades represent genes that are just starting to emerge. While we do not believe genetics are the only factor in evaluating dietary choices, we see them as a foundational tool to help people get started sifting through the mountain of marketing material aimed at funneling them to one of the popular dietary camps.

I have long believed that there is no one right diet (way of eating) for everyone and was so glad to come across the Gene Food site for this reason. Finally, science is getting closer to customizing nutrition! While nutrigenomics (broadly defined as the relationship between nutrients, diet, and gene expression) is an emerging field and there is still a LOT to be discovered, what is currently known is promising.

I learned a lot of other interesting things from my Gene Food report.

Gene Food has identified 20 distinct diet types. Based on my genetic data, my diet type is Nordic.

When you get your custom nutrition plan, you’ll be able to view it via a link Gene Food will send you by email, and you’ll also be able to download a more detailed PDF version. You’ll also see a button at the top of your plan that says “Download Meal Plan” – be sure to click on that because it is an in-depth PDF guide to eating according to your diet type.

Here is a screenshot of the beginning of my report, from the Overview section:

I found this VERY interesting because in early 2019 I switched from years of low-carbohydrate eating to a whole-food, plant-based way of eating, and have felt SO much better since I made the change. So, it looks like I was on the right path far before I’d even heard about Gene Food. On that note, remember that not all carbohydrate sources are created equal. For more on how to choose good carb sources, please see What are good carbs? A new study provides answers.

Clearly, low-carb high-fat diets truly are NOT right for everyone.

Neither are ketogenic diets, on that note:

Nordics likely don’t have the fat metabolism genes to pull off a Ketogenic diet.

In fact, for some people, high fat intake can be quite dangerous.

Why is dietary fat intake a concern for some genotypes, including those who are assigned the Nordic way-of-eating?

My report explains:

You don’t need to be on a low-fat diet, but should limit saturated fat and processed omega 6 rich fats like vegetable oils.

Analysis of your SNPs has suggested that a Nordic diet will prove beneficial for your general wellbeing. This diet type is characterized by a slightly lower overall fat intake, with an associated increase in carbohydrates, omega 3 rich proteins and plant proteins. Because you fall into the middle of our fat analysis based on your genetics, a good way to determine whether you are eating a healthy level of fat is to have your blood work done regularly. Your doctor can measure markers like LDL-P, APOB, and LDL-C, all of which are indicators of increased risk for heart disease when out of range. Having said that, you should definitely avoid high fat diets.

Here’s a screenshot of my dietary fat recommendations:

My custom plan is 26 pages long and quite detailed – and very impressive and useful.

I have two copies of two risk alleles for lactose intolerance, which is not surprising – I have known I am lactose intolerant for years.

And, I have risk alleles for gluten intolerance – also not a surprise, since I was diagnosed with Celiac disease several years ago.

Some information on my report surprised me.

What I did not previously know was that I have MANY risk alleles for cardiovascular disease, high cholesterol, and type 2 diabetes. All of my bloodwork has always been normal, but my guess is that I’ve been dodging bullets all this time because I’ve always been good about eating healthfully. Discovering that I have so many risk alleles that relate to cholesterol and dietary fat (21 out of nearly 40 in these categories) was a bit alarming, to say the least! I was adopted as an infant and don’t know a lot about my biological parents’ health history, so this information is particularly valuable to me.

Thankfully, I have always been health-conscious and I am particularly glad I have been following a whole-food, plant-based diet for nearly a year. My nutrition plan does recommend that I eat some fish, but that is one thing I am not willing to do (personal preference). However, I do take algal oil.

I am not going to share more details from my report out of respect for Gene Food – the sample plans they provide on their website do not provide full information, so I feel I probably should not share ALL of my details (and, some are a bit personal anyway).

If you’d like to learn more about Gene Food or order a custom nutrition plan from them (which I highly recommend!), you can do so here: Custom Nutrition Plan. If you have not done an Ancestry or 23andme test, don’t worry – Gene Food has a test kit you can order.

Gene Food can help you cut through all the noise about different diets and give you actual data to work with, based on your own genetic markers.

If you decide to order a custom nutrition plan from them, please let us know in the comments!

****

Want to join our online communities? Check them out here: All About Habits group for motivation and inspiration and Plant-Based for 30


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This is Why There Is No One Right Way to Eat For Everyone

Learning more about your genes can help you cut through all the confusion about nutrition and give you actual data to work with.

Everything You Need to Know About Gluten

Is “gluten-free” just another trendy health movement, or is there something to this way of eating?

You vs. You: How Your Current Self Is Making Life Much Harder for Your Future Self

An intriguing theory about why we tend to choose immediate gratification over rewards that will pay off later has emerged from the field of addiction studies.

An Open Letter to Mothers and Caregivers Everywhere

If you are struggling with your weight or want to prevent obesity in your family, or aren’t concerned about weight issues but want to eat and move better and find time for self-care, we’ve got ideas for you. Your family does not have to be a statistic.

Are You Tired of Your Health and Your Money Going Up in Smoke? I Can Help!

This How to Become a Non-Smoker program will show you how to change your thinking about smoking so can ditch the habit for good.

How to Make Sublime Superfood Smoothies

Smoothies are a fast, easy, and delicious way to squeeze a bunch of nutrients into your diet – and are a great way to get even the pickiest eaters to consume “yucky” foods like kale and spinach.

Obesity Can Significantly Shorten Your Life, and You Really Can’t be “Fat But Fit”

Two recent studies on obesity yielded some concerning findings regarding its impacts on life expectancy and heart disease.

Let’s take a look at each.

Obesity and Longevity

In April, researchers from the Cleveland Clinic and New York University School of Medicine found that obesity resulted in as much as 47 percent more life-years lost than tobacco, and tobacco caused similar life-years lost as high blood pressure.

The research team found the greatest number of preventable life-years lost were due to (in order from greatest to least) obesity, diabetes, tobacco use, high blood pressure, and high cholesterol.

Of the five top causes of death, three (diabetes, hypertension, and high cholesterol) are treatable with medications and lifestyle changes. Obesity and tobacco use are more challenging issues to resolve: both involve complex psychological factors.

From the press release:

To estimate the number of life-years lost to each modifiable risk factor, researchers examined the change in mortality for a series of hypothetical U.S. populations that each eliminated a single risk factor. They compared the results with the change in life-years lost for an “optimal” population that eliminated all modifiable risk factors. Recognizing that some less common factors might place substantial burden on small population subgroups, they also estimated life expectancy gained in individuals with each modifiable risk factor.

The reality is, while we may know the proximate cause of a patient’s death, for example, breast cancer or heart attack, we don’t always know the contributing factor(s), such as tobacco use, obesity, alcohol and family history. For each major cause of death, we identified a root cause to understand whether there was a way a person could have lived longer.

Glen Taksler, Ph.D., internal medicine researcher from Cleveland Clinic and lead author of the study, said of the findings,

“Modifiable behavioral risk factors pose a substantial mortality burden in the U.S. These preliminary results continue to highlight the importance of weight loss, diabetes management and healthy eating in the U.S. population.”

***

Busting the “Fat but Fit” Myth

Storing too much fat in the body is associated with a number of metabolic changes, including increased blood pressure, high blood sugar, and altered cholesterol levels, which have been linked to numerous health problems and diseases.

However, some studies have revealed a subset of overweight people who appear to lack the adverse health effects of excess weight, leading to them being classified as “metabolically healthy obese” in the medical literature (referred to “fat but fit” in the media).

In August, researchers from Imperial College London, University College London, and other institutions across Europe found that being overweight or obese increases a person’s risk of coronary heart disease (CHD) by up to 28 percent compared to those with a healthy bodyweight – even if they have healthy blood pressure, blood sugar, and cholesterol levels.

For this study – the largest of its kind to date – scientists used data from more than half a million people in 10 European countries – taken from the European Prospective Investigation into Cancer and Nutrition (EPIC). They found that excess weight is linked with an increased risk of heart disease, even when people have a healthy metabolic profile. Researchers focused on weight and signs of heart disease. Then, they looked at more than 7,637 people who had cardiovascular events such as death from heart attack, and compared them to more than 10,000 people who didn’t have heart problems.

Being metabolically unhealthy or having metabolic syndrome was defined as having three or more of the following at baseline:

  • high blood pressure, use of blood pressure medications, or self-reported history
  • high triglycerides (a type of fat) or use of lipid-lowering medication like statins
  • low HDL (good) cholesterol
  • high blood sugar, use of diabetes medications, or self-reported history
  • high waist circumference

Researchers looked for the new development of heart disease during follow-up, either self-reported or through data from GP and hospital registers and mortality records. The last follow-up ranged from 2003- 2010, with an average of 12.2 years.

They looked at the link between body fat, metabolic markers, and developing heart disease, adjusting for baseline variables of country, gender, age, education, smoking status, alcohol intake, diet, and physical activity.

After those adjustments and considerations, the scientists found that people with three or more heart risk factors like high blood pressure, high cholesterol, or large waist sizes (more than 37 inches for men and 31 inches for women) were more than twice as likely to have heart disease, regardless of whether their weight was normal or above normal.

But those who were considered overweight yet healthy were still 26 percent more likely to develop heart disease than their normal-weight peers. Those considered healthy but obese had a 28 percent higher risk, the study found.

The findings, which were published in the European Heart Journal, add to a growing body of evidence that suggests being “fat but fit” is a myth, and that people should aim to maintain a body weight within a healthy range.

The excess weight itself may not be increasing the risk of heart disease directly, but rather indirectly through mechanisms such as increased blood pressure and high glucose, the researchers said.

Lead author Dr. Camille Lassale explained,

“Our findings suggest that if a patient is overweight or obese, all efforts should be made to help them get back to a healthy weight, regardless of other factors. Even if their blood pressure, blood sugar and cholesterol appear within the normal range, excess weight is still a risk factor.”

Dr. Ioanna Tzoulaki, from Imperial’s School of Public Health, added,

“I think there is no longer this concept of healthy obese. If anything, our study shows that people with excess weight who might be classed as ‘healthy’ haven’t yet developed an unhealthy metabolic profile. That comes later in the timeline, then they have an event, such as a heart attack.”

***

Additional Resources:

Secrets from the Eating Lab: The Science of Weight Loss, the Myth of Willpower, and Why You Should Never Diet Again by Traci Mann, PhD

Diet Anarchy: Are You Sabotaging Yourself?

Diet Anarchy: The More Things Are Forbidden…

Why You Should Ditch Your Scale

Diet Anarchy: Are You Eating Enough?

Diet Anarchy: Should You Count Calories or Eat Intuitively?

***

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About Those Dust Bunnies Lurking in Your Home…They Might Be Making You Fat

Warning: This article may trigger an intense desire to obsessively clean your residence.

Overeating, sedentary lifestyles, lack of exercise…these are known contributors to the world’s obesity epidemic.

But a new study suggests a common household annoyance may play an unexpected role: dust.

Small amounts of house dust containing common environmental pollutants can spur fat cells to accumulate more triglycerides, or fat, in a lab dish, researchers at Duke University found.

The study was funded by the National Institute of Environmental Health in the US, and was published in the peer-reviewed journal Environmental Science and Technology.

The implicated pollutants are known as endocrine-disrupting chemicals (EDCs). They are synthetic or naturally occurring compounds that can interfere with or mimic the body’s hormones. EDCs, such as flame retardants, phthalates, and bisphenol-A, are known for their potential effects on reproductive, neurological, and immune functions.

But animal studies also suggest that early life exposure to some EDCs – known as “obesogens” – can cause weight gain later in life.

Some manufacturers have reduced the use of EDCs in products, but many are still ubiquitous in consumer goods. They wind up in indoor dust that can be inhaled, ingested, or absorbed through the skin.

The U.S. Environmental Protection Agency estimates that children consume 50 milligrams of house dust each day. Concerned about the potential effects EDCs in dust might have on children’s health, the researchers wanted to see if the compounds in house dust might have an effect on fat cells.

They took samples of indoor dust from 11 homes in North Carolina, and tested extracts from those samples in a mouse pre-adipocyte cell model.

According to the researchers, extracts from seven of the samples triggered the cells to develop mature fat cells and accumulate fat. Extracts from nine samples spurred the cells to divide, creating a bigger pool of precursor fat cells. Only one sample showed no effects. The researchers concluded that house dust is a likely source of chemicals that may disrupt metabolic health, particularly in children.

In a press release, the American Chemical Society elaborates:

Additionally, among the 44 individual common house dust contaminants tested in this model, pyraclostrobin (a pesticide), the flame-retardant TBPDP, and DBP, a commonly used plasticizer, had the strongest fat-producing effects. This suggests that the mixture of these chemicals in house dust is promoting the accumulation of triglycerides and fat cells, the researchers say. Amounts of dust as low as 3 micrograms — well below the mass of dust that children are exposed to daily — caused measurable effects.

Head researcher Dr. Heather Stapleton said of the findings,

“What our study demonstrates is that exposure to mixtures of chemicals found in our home can change the metabolic function of our cells.

“At this point it’s difficult to provide advice on how to avoid exposure…cleaning more with wet techniques (e.g. mopping) can help remove and reduce dust particles […] dry dusting can sometimes release more dust particles to the air which can then be inhaled.”

If this study inspires you to scrub down every surface and vacuum every corner of your home, that’s not necessarily a bad thing. Most of us could use a bit (okay, a LOT) more exercise.

But keep in mind that this study is very small, and it didn’t look at whether those whose homes are dustier than others are exposed to more chemicals. And, we don’t know if the effects on the mouse cells would be seen in human cells.

The study does, however, build on previous research, also led by Dr. Stapleton. And, other studies on the relationship between endocrine disruptors and obesity have yielded similar findings – some referring to obesogens as an emerging threat to public health.

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