Do high fat foods cause asthma?

The following post was originally published at HealthCentral/asthma on 5/16/2011:

“Do high fat foods trigger asthma?”

American’s love Big Macs, Whoppers, French fries, onion rings and deep fried chicken.  These are convenient foods that are simply delicious.  Yet the old saying goes, “If it tastes good, it’s probably not good for you.”

Now we already knew such high-fat foods are bad for your heart.  Yet new evidence suggests they may also be bad for your lungs.

A study completed by Australian researchers in 2010 tested asthmatics before and after eating a meal, and determined that lung function was worse after eating a high-fat meal.

If that wasn’t bad enough, the study also concluded that high-fat foods also made it so asthma rescue medicine (like Albuterol) worked less well.

Scientists aren’t sure why this is, yet there are theories.  One theory suggests that your asthmatic immune system might recognize saturated fat as an enemy and promptly acts to rid it from your system.

This response results in an increase in markers of inflammation such as leukotrienes and hystamine, and these increase inflammation in your respiratory tract.  This causes muscles lining your air passages to constrict, and thus an asthma attack is the result.

Perhaps due to the increased inflammation, asthmatics who used their rescue medicine after eating a high-fat meal did not get as much relief as those who ate low-fat meals.   Likewise, lung function improved less in subjects who used their rescue medicine after eating high-fat meals.

Obviously asthma rates have increased incrementally in the U.S. and other western nations over the past 20 years.  This new theory suggests one of the factors might be the high-fat foods we put into our bodies.

I’ve also read other studies that suggest that if you’re exposed to something that triggers inflammation in your lungs, and exposed to it often enough, the inflammation may become permanent.  Thus, asthma is developed.

It’s studies like this that remind us that the way we eat may determine the lives we live.  If you want to prevent asthma, or prevent an asthma flare, it may be a good idea to eat a healthy diet.

Does that mean we asthmatics should never eat great tasting, convenient and high-fat foods?  Absolutely not.  Yet it’s good to know the facts, and it’s good to know what foods might not be good for us.
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Do high altitudes affect people with asthma?

The following is from healthcentral.com/asthma.

How Do High Altitudes Affect People with Asthma?

So what is the effect on high altitudes on asthma? If I board an airplane, will this make my asthma worse? What if you climb to the top of a mountain?

These are common questions I’ve had to answer over the years. In fact, when I traveled to Denver in 1985 to stay at the asthma hospital — Denver is a mile high — this was one of the questions my parents asked.

If high altitudes affect your asthma, it’s due to one of the following:

• Air is cooler and drier at higher altitudes. As I noted in this post, cool and dry air has in increased tendency to trigger asthma.


• The higher up you go the less oxygen there is in the air you breathe, this results in less oxygen getting to your lungs. If your lungs are already compromised, and the oxygen in your blood is already low, going UP may cause you to feel especially winded.

If your asthma is controlled, you should have no trouble coping with higher altitudes.  However, if you have uncontrolled asthma, or if you have severe asthma, you might have some trouble.

The folks with the most trouble coping are those with severe, persistent asthma, or your prototypical hardluck asthmatic.  The reason is because due to bad asthma, these folks might already have a lower level of oxygen in their blood.

When these hardluckers board a plane, or climb a mountain, they might start to feel winded before other folks do.  With a lower level of oxygen in their blood, and now inhaling less oxygen than at sea level, you can see how they might quickly get winded.

This is also true of Chronic Obstructive Pulmonary Disease (COPD) patients.  If you want to learn more about the details of why this happens, I explain it in this post about why COPD patients may experience dyspnea in flights.

An interesting twist here is that while doing my research I found many studies (like this 2008 study) that actually show higher altitudes may benefit asthmatics by improving lung function and reducing the need for asthma controller medicines.

The reason is believed to have something to do with a reduction of t-helper and b-helper cells that cause inflammation (swelling) in your airways. With less swelling your lungs are less responsive to your asthma triggers, and you’ll require less controller medicine.

Likewise, this 2001 study shows children who live in higher altitudes were less likely to have asthma and when they did it was less severe.

Now these are just a few isolated studies, yet it’s still interesting to think about.

If you have hardluck asthma you might want to talk to airline officials about making plans to help you during flight.  Yet the rest of us asthmatics should be able to cope to higher altitudes quite well.

The link between high fat foods and asthma

The following originally appeared at Healthcentral.com/asthma on May 16, 2011.

Can Eating High-Fat Foods Trigger Asthma?

American’s love Big Macs, Whoppers, French fries, onion rings and deep fried chicken.  These are convenient foods that are simply delicious.  Yet the old saying goes, “If it tastes good, it’s probably not good for you.”

Now we already knew such high-fat foods are bad for your heart.  Yet new evidence suggests they may also be bad for your lungs. 

A study completed by Australian researchers in 2010 tested asthmatics before and after eating a meal, and determined that lung function was worse after eating a high-fat meal.

If that wasn’t bad enough, the study also concluded that high-fat foods also made it so asthma rescue medicine (like Albuterol) worked less well. 

Scientists aren’t sure why this is, yet there are theories.  One theory suggests that your asthmatic immune system might recognize saturated fat as an enemy and promptly acts to rid it from your system. 

This response results in an increase in markers of inflammation such as leukotrienes and hystamine, and these increase inflammation in your respiratory tract.  This causes muscles lining your air passages to constrict, and thus an asthma attack is the result.

Perhaps due to the increased inflammation, asthmatics who used their rescue medicine after eating a high-fat meal did not get as much relief as those who ate low-fat meals.   Likewise, lung function improved less in subjects who used their rescue medicine after eating high-fat meals.

Obviously asthma rates have increased incrementally in the U.S. and other western nations over the past 20 years.  This new theory suggests one of the factors might be the high-fat foods we put into our bodies.

I’ve also read other studies that suggest that if you’re exposed to something that triggers inflammation in your lungs, and exposed to it often enough, the inflammation may become permanent.  Thus, asthma is developed.

It’s studies like this that remind us that the way we eat may determine the lives we live.  If you want to prevent asthma, or prevent an asthma flare, it may be a good idea to eat a healthy diet.

Does that mean we asthmatics should never eat great tasting, convenient and high-fat foods?  Absolutely not.  Yet it’s good to know the facts, and it’s good to know what foods might not be good for us.