6. Inhaling secondhand smoke
Obviously, one of the worst things you can do for your health in general, including your immunity, is to smoke. Smoking kills hundreds of thousands of people a year and causes damage to every system in the body. But what if you don’t smoke but are exposed to secondhand smoke? What if your partner is a smoker, for example, and you often breathe in their secondhand smoke? Well, research shows that exposure to secondhand smoke is almost as bad for you as smoking.
Being around smokers exposes you to all the toxic chemicals in their secondhand smoke. These toxins can cause serious immunity problems by repressing the cells responsible for fighting off illness. When you inhale that smoke, these toxins change the number of several different immune cells. It also stops other immune cells from functioning effectively.
Another good reason to avoid secondhand smoke is that it can make you vulnerable to infections of the respiratory system. It also makes you more prone to allergies and asthma, and even lung cancer. In fact, tobacco smoke contains over 4 000 chemical productions, 50 of which can cause cancer. The strange thing is that some of these cancer-causing products are more concentrated in secondhand smoke than the original smoke inhaled by the smoker. Secondhand smoke is twice as high in nicotine and tar than the smoke inhaled by smokers.
It is obvious, then, that you need to avoid secondhand smoke as much as possible. Don’t spend time with people who smoke, or ask them to please not smoke in your presence. Don’t allow anyone to smoke in a room you are in. Keep away from places that allow smoking. Stay at smoke-free hotels when you travel so that you avoid left-over smoke from previous guests. And encourage everyone in your life who smokes to quit. It’s not easy to quit smoking, but it can be done. Doctors and therapists can all help a smoker to quit and adopt a healthier lifestyle.
7. A poor diet
Studies show that eating a burger and fries can be as harmful to you as catching a life-threatening illness. It turns out that junk food causes the immune system to go haywire. It behaves as if it is being attacked by a serious disease. In fact, a diet high in fast food makes our immune cells more aggressive over time. This increases the chances of developing a serious illness. This effect lasts long after switching to a diet full of fruit and vegetables. Research has found that fast food causes the arteries to harden, increasing blood pressure and damaging the heart.
So next time you eat a meal, notice how many white or beige foods there are on your plate. Is your food colorful, full of fresh fruits and vegetables, or does it consist of junk? Are you eating burgers and fries all the time? If you are, you’re consuming a lot of saturated fats. There are two kinds of fat: saturated and unsaturated. A diet high in saturated fat is linked to many different illnesses, including obesity, heart attacks, high blood pressure and a weaker immune system.
In fact, what saturated fats do is that they cause your immune system to attack the healthy cells in your body. If you eat a lot of junk food, you probably consume more calories than your body needs. This makes it likely that you are overweight, or even obese. Apart from the many other effects that being overweight brings, it turns out that obesity can affect our white blood cells. These cells fight infection, and excess body weight prevents these cells from multiplying and producing antibodies. This makes you more likely to catch infections.
If you eat a poor diet, you are also probably eating lots of sugar and salt too. Both of these have a negative impact on our immunity. A diet high in sugar, salt, and saturated fats can increase inflammation in the body, which has negative consequences. It also stops the immune system from being able to control infections. An unhealthy diet increases your risk of cancer, allergies, and auto-immune disease.
8. Too much caffeine
Are you one of those people who gets through the day by drinking copious quantities of caffeine? Well, it turns out that drinking a lot of coffee, tea or other caffeinated drinks is bad for your immune system. When you take in a lot of caffeine, your nervous system becomes stimulated. This increases the stress levels in your body. When your body is stressed, stress hormones are released.
Excessive caffeine stimulates your nervous system by increasing the stress level in the body. A high-stress level causes the release of stress hormones like cortisol, the fight-or-flight hormone. When cortisol is released, your body starts to release stored up fats and sugars to prepare the body for exertion. This complex process is called the stress response.
This stress response is important for survival, but if it persists, it can cause serious health problems. These include high blood pressure, high cholesterol, heart problems and a suppressed immune system. Some of the symptoms of high cortisol levels include a puffy, flushed face, weight gain, skin problems like acne, muscle aches and pains, mood swings, increased anxiety, tiredness, and insomnia.
But you don’t have to give up your favorite cuppa Joe. You just have to limit your intake to two cups a day. Or the same amount of tea. Ditch the caffeinated sodas because they do you no good at all. In fact, a moderate amount of coffee is actually good for you. Around two cups of coffee a day can reduce the risk of death from cirrhosis of the liver by 66%. Caffeine’s stimulating effect also leads to higher energy levels, better mood and improved brain function in some areas.
9. Not using sunblock
Most of us love a bit of sun, and our body actually needs it to produce vitamin D. This vitamin is vital to our bones, but also to our immune systems, and can help fight colds and flu. The problem is when you spend a lot of time in the sun without using sunscreen. This is when the sun becomes a danger to our immunity. Ultraviolet (UV) rays contained in sunlight can damage or kill certain cells that are close to the surface of the skin.
The skin, the largest organ in the body, is our first line of defense against chemical toxins and infections. UV light actually causes immunological changes in the body and can aggravate problems such as herpes or yeast infections. It can also cause cancer. UV light changes our DNA, which is where all our genetic information is stored. This can lead to the abnormal cell growth associated with cancer. Skin cancer is very common, often only becoming visible years after repeated sun exposure. In the developing world, high levels of UV exposure might decrease the effectiveness of vaccinations.
The simplest way to avoid the damaging effects of sunlight on your immunity is to wear sunscreen. You should look for one that has a minimum of SPF 15, but preferably around SPF50. Sunscreen should be applied all over in generous amounts. It should also be reapplied regularly, especially if you are swimming or sweating. Don’t forget to apply sunscreen in winter. Just because you don’t see much of the sun doesn’t mean it’s not damaging your skin.
And what about vitamin D? Some doctors recommend daily exposure to sunlight without sunblock for a maximum of 15 minutes. This will ensure that your body produces enough vitamin D for health. Do not expose your head, neck or extremities to the sun. Rather exposure one of the larger portions of your body such as your torso or your back. After your daily 15 minutes of exposure, apply sunblock for daily protection from the harmful effects of the sun. Children should be educated about the dangers of sun exposure from a young age and encouraged to always wear sunscreen.
10. You don’t get enough sleep
Sleep is life’s great healer. In fact, there is a direct link between the quality and quantity of sleep we get and our immune system. If you don’t get enough sleep, you become sleep deprived. Sleep deprivation weakens your immunity so that you become vulnerable to any pathogen or bug that comes along. Even short-term sleep deprivation can have a significant effect on how well your immune system functions.
If you lose a small amount of sleep, your immune system can be triggered to increase inflammation, the body’s enemy. Sleeping problems can even increase your risk of getting diseases such as certain cancers, heart disease, obesity, diabetes, and arthritis. When we sleep, our body makes or releases certain substances that fight disease and infection. A lack of sleep deprives us of these chemicals, leading to vulnerability to pathogens.
If we do become ill from something like a cold or flu, lack of sleep can cause us to remain sick for longer. This is because the body doesn’t have the necessary chemicals for fighting off the invading pathogen. When we sleep, we go through four main stages of sleep. It is during the deepest and most relaxing stages of our sleep cycle that the immune system kicks in. Interrupted sleep or too little sleep prevents us from maintaining a healthy level of immunity.
To keep your immune system healthy, make sure you get adequate sleep. The amount of sleep we need depends partly on age. For adults, the recommended period is 7 or 8 hours. Keep to a consistent routine every night. To bolster your immunity, go to bed and get up at around the same time every day. Don’t overdo it, though. Sleeping too much can put you at higher risk for some diseases.
11. You are inactive
If you lead an inactive life, you are endangering your immunity. One way in which physical activity can help your immunity is that during exertion, bacteria and viruses are flushed out of the lungs and airways. This might lead to fewer illnesses such as colds and flu. Also, when you exercise, your body temperature rises, preventing some bacteria from multiplying.
Moderate exercise increases our heart rate, blood pressure and rate of breathing. This releases hormones into the bloodstream, suppressing certain inflammatory responses. Too much inflammation can lead to various autoimmune diseases such as multiple sclerosis and rheumatoid arthritis. Exercise causes antibodies and white blood cells to circulate more quickly, enabling quicker detection of infection.
Exercise also slows down how quickly stress hormones are released into the body, protecting you from infections. Regular exercise is, in fact, good for the entire body. It can control high blood pressure and diabetes, as well as prevent Alzheimer’s disease. It reduces stress levels and anxiety, and slows down the aging process. In fact, regular moderate exercise can add up to 10 years to your life!
But it turns out that too much exercise is also bad for our immunity. Research found that elite athletes who exercise a lot got sick far more than those who exercised moderately. They were even more vulnerable to illness than sedentary couch potatoes! The answer seems to be moderate amounts of exercise such as a daily 30-minute walk or a gym workout every second day.
12. You travel frequently
Do you travel a lot? If so, you come into contact with lots of people. Some of them are carrying infections that you could catch. Traveling puts your body under quite a lot of stress. When you travel, you often experience changes in air pressure, temperature, and climate. You will probably lose sleep, and suffer from the stresses and strains of planning your schedule and being on time. In fact, studies show that traveling, especially by airplane, can weaken your immune system.
Insufficient sleep can negatively affect your immunity. If you travel at night or take red-eye flights, you’re probably not getting enough uninterrupted sleep. This will compromise your immune system. Being awake at night can prevent the body from producing T-cells, which are immune system boosters. This will make you more susceptible to illnesses.
If you experience changes in temperature or climate, your immunity will be affected. When you fly, you experience quick air pressure changes. This puts a strain on oxygen levels and blood flow. The air inside airplanes is also usually a lot less humid than the air outside. This can often lead to dehydration. And as we saw above, insufficient hydration can compromise the immune system.
All the physical and emotional stress of traveling can affect your health. From packing your suitcases to getting to the airport or station on time, all of these factors can negatively affect your immune system. Prepare yourself by drinking water, and avoiding alcohol and caffeine. Clean highly-contaminated areas such as tray tables with disinfectant wipes, and keep your hands clean.
13. You take a lot of antibiotics
Do you reach for the antibiotics every time you get a sniffle? If so, you might be damaging your immune system. Antibiotics are one of the greatest human inventions in the history of medicine. They have saved literally millions of lives as powerful partners in the body’s fight against the disease. However, if used incorrectly, antibiotics can cause more harm than good.
Research shows that some people taking antibiotics had reduced levels of the hormones that carry messages for the immune system. This compromised the people’s immunity, leaving them open to infections and disease. If you take a lot of antibiotics, you might develop resistant bacteria. These resistant bacteria are not affected by antibiotics, making them useless in treating the infection.
To prevent your immune system from being compromised by antibiotics, only ever taken them if you really need them. Many people think they can stop taking them when they feel better. This is a serious mistake. When you are prescribed a course of antibiotics, you should take every single tablet or capsule as instructed by your doctor. If you don’t, you stand the chance of developing resistant bacteria, or superbugs. These superbugs are extremely difficult to treat, and could even cause the outbreak of an epidemic.
Antibiotics only kill bacteria, not viruses, including the cold and flu viruses. If a doctor prescribes antibiotics for a viral infection, the ‘good’ bacteria that naturally occur in your body will be killed. This might lead to an overgrowth of other microbes such as yeasts and fungi. Thrush is a common outcome of antibiotic treatment. Should your doctor prescribe antibiotics, ask them to give you something to prevent problems such as thrush.
14. You are a meat eater
Many millions of people across the world include meat as a staple part of their diet. Some people cannot imagine living without red meat, but the truth is that vegetables, seeds, nuts and whole grains provide better nutrition than meat. They are also usually free of additives, antibiotics, hormones and other harmful substances often found in meat. But what about our immunity? Does meat affect it?
Research has shown that eating red meat can trigger a reaction that can weaken our immunity. Red meat contains a particular natural sugar that our bodies are unable to digest. This particular sugar is believed to cause other health problems such as a higher risk of certain types of cancer. But arguably the most dangerous type of meat to eat is processed meat. This includes hot dogs, bacon, bologna, and others.
In fact, scientists have discovered that people who eat a great deal of processed meat risk dying early by a staggering 44%. Part of the problem is the fact that processed meats usually contain a large amount of saturated fat or cholesterol, giving rise to heart disease. It also contains nitrates that cause the formation of cancer-causing agents called carcinogens. Nitrates have been linked to both stomach and colorectal cancer.
Researchers have found that processed meats contain additives that weaken our immunity to toxins, possibly increasing the risk of developing autoimmune diseases. It is recommended that you cut processed meats from your diet. If you simply cannot do that, limit your intake to an ounce or less per day. Also reduce your red meat intake as much as possible. Although meat does contain nutrients, you can meet your nutritional needs quite easily on a diet rich in legumes, vegetables, and grains.
15. You suffer from grief or loneliness
It might come as a surprise that experiencing grief and/or loneliness can actually make you physically sick. If you have lost a loved one, you have to go through the pain of living without them You might be lonely and isolated. The truth is that the chronic stress of grief has a major impact on the body. In fact, prolonged grief can put you at risk of several mental and physical health complications.
If you are in the acute stages of grief, your emotions engage the body’s fight-or-flight response. This is a state of preparedness for fighting an enemy or fleeing. It’s like an alarm has gone off in your body. The stress hormones adrenaline and cortisol are released, and your heart rate, blood pressure, and respiratory rate go up. Cortisol also alters the way in which our immune system functions. The problem is when you are constantly in this stressed state.
In chronic stress situations such as prolonged grief, these stress hormones can cause disruptions to most of the body’s processes. This puts your health at risk, and can actually shorten your lifespan. Prolonged grief can lead to digestive problems, headaches and migraines, anxiety, depression, heart disease, stroke, weight gain, memory and concentration problems, and immune system dysfunction. The latter can leave you vulnerable to all sorts of viruses and bacteria doing the rounds.
Even loneliness without grief can cause major damage to your health. The pain of loneliness also activates the fight-or-flight response. Lonely people have been found to have immune systems that work differently. Their white blood cells increase inflammation and are less effective at fighting viruses. Chronic loneliness leads to chronic inflammation. This has been linked to cancer, neurodegenerative diseases, and viral infections.