Showing posts with label Caffeine. Show all posts
Showing posts with label Caffeine. Show all posts

Sunday, March 28, 2010

Decaf Coffee for Coffee Lovers who Want to Drink Coffee without Caffeine

 
Most Americans love their morning coffee. Even when we are rushing out the door, we still have time for that all important cup of joe. Caffeine occurs naturally in coffee and is therefore used as a beverage for its stimulating affect. Did you know that coffee is the most widely consumed beverage in the world?

Caffeine can cause jitters and nervousness and is not recommended for individuals with certain health problems. Because of this, some individuals have taken the decaffeinated route, but did you know you are still consuming a little bit of caffeine? Have you ever wondered how they get the caffeine out of those delicious aromatic little coffee beans? Well, if you have, you've come to the right place! Let's take a look at some of the processes used to remove caffeine from coffee beans.

The first step to removing caffeine from coffee beans is to soak the beans in water. This softens the beans. After soaking, a solvent such as methylene chloride is used to remove the caffeine. Methylene chloride is used in several products to remove caffeine as the molecules blend together. The beans are processed either directly or indirectly. The direct method is where the beans are soaked directly into the chemical solution. Indirectly is where the water is treated with the methylene chloride solution and then the beans are soaked in the water after the caffeine has been removed.

Coffee labeled naturally decaffeinated is another chemical process of removing caffeine from coffee beans. The beans are again soaked in water and then the coffee water solution is treated with ethyl acetate. Ethyl acetate is a chemical found naturally in fruits, therefore the term naturally decaffeinated. After the caffeine has been removed, the coffee beans are again soaked in the coffee water solution so they can reabsorb their natural flavor.

Water processing is where the beans are soaked in water and no chemicals are used. After soaking the beans, the solution is drained through carbon filters that remove the caffeine and then the beans are soaked in the water to absorb oils and flavor.

Another type of water processing is called the Swiss Water Process. This is similar to the water processing method however the coffee water is used instead of plain water. Basically the beans are soaked over and over again to preserve flavor after being passed through carbon filters.

The last process is carbon dioxide processing. That is where the beans are soaked in water and then treated with carbon dioxide in a pressure cooker at high temperatures and very high pressure. The carbon dioxide bonds with the caffeine molecules and is then removed from the beans.

Coffee beans are treated before roasting to preserve flavor. Even though coffees are labeled decaffeinated, they still contain some measure of caffeine. In the United States 97% of the caffeine must be removed to qualify as decaf. What do they do with this left over caffeine? Surprisingly it is used in soft drinks and other products.

Wednesday, October 14, 2009

The Relationship among Coffee, Caffeine and Fitness


One look at a line at the local Starbucks in the morning and you don’t need to be convinced of the huge amount of coffee consumption in the U.S. The National Coffee Association found in 2000 that 54% of the U.S. adult population drinks coffee daily. Guess there’s nothing like the first double espresso in the morning to clear the cobwebs from our heads so we can face the day.

But what are the effects relating to fitness? If that grande-no-foam-double-whipped-extra-shot-no-fat latte gives us the get-up-and-go to start our day at work, will it do the same if we’re headed to the gym?

Physiological Effects
The main ingredient in coffee that gives us that jolt is caffeine, a central nervous system stimulant. Caffeine is found naturally in coffee beans, tea leaves, and chocolate, and is a popular added ingredient in carbonated beverages and some over-the-counter medications such as cold remedies, diuretics, aspirin, and weight control aids. It is estimated that in the U.S., 75% of caffeine intake comes from coffee.

Caffeine stimulates the central nervous system by blocking adenosine, a neurotransmitter that normally causes a calming effect in the body. The resulting neural stimulation due to this blockage causes the adrenal glands to release adrenaline, the "fight or flight" hormone. Your heart rate increases, your pupils dilate, your muscles tighten up, and glucose is released into your blood stream for extra energy. Voila… you now have the caffeine buzz.

But wait…we’re not done yet. Caffeine also increases dopamine. Dopamine activates the pleasure in parts of the brain. It has been suspected that this also contributes to caffeine addiction.

Physiologically, caffeine makes us you feel alert, pumps adrenaline to give you energy and changes dopamine production to make you feel good. Another espresso, anyone?

Ergogenic Effects of Caffeine to Performance
In addition to various psychological and physiological benefits, numerous studies have documented caffeine’s ergogenic effect on athletic performance, particularly in regard to endurance. Studies show that caffeine ingestion prior to exercising extended endurance in moderately strenuous aerobic activity. Other studies researching caffeine consumption on elite distance runners and distance swimmers show increased performance times following caffeine consumption.

Despite effects on endurance, caffeine produced no effect on maximal muscular force in a study measuring voluntary and electrically stimulated muscle actions. However, the same study did show findings that suggest caffeine has an ergogenic effect on muscle during repetitive, low frequency stimulation.

Caffeine’s positive performance-enhancing effects have been well documented. So much so that the International Olympic Committee placed a ban leading to disqualification for an athlete with urinary limits exceeding 12 mg/mL. Roughly 600 to 800mg of caffeine, or 4 to 7 cups of coffee, consumed over a 30-minute period would be enough to exceed this level and cause disqualification. The National Collegiate Athletic Association has a similar limit, set at 15 mg/mL.

Coffee: A Pre-Workout Drink?
Before you make Starbucks part of your pre-workout warm-up in order to harness the effects of caffeine, be aware that simply downing a grande may not give you similar benefits found in these studies. A recent Canadian study published in the Journal of Applied Physiology compared the effect of coffee and caffeine on run time to exhaustion. A group of nine men took part in five trials. Sixty minutes before each run, the men took one of the following:

• A placebo
• Caffeine capsules
• De-caffeinated coffee with caffeine added
• Regular coffee

Performance times were up to 10 times longer in subjects using the caffeine capsules, with no differences in times among the other trials. Since the level of caffeine absorption was similar during the caffeine trials, researchers concluded something in the coffee itself that interferes with caffeine’s performance-enhancing effects. This makes sense considering that there are literally hundreds of compounds dissolved when coffee beans are roasted, ground and extracted. Results of this research suggest that if benefits of caffeine on endurance times are desired, caffeine capsules work better than coffee.

Caffeine and Creatine Supplementation
Although caffeine has been shown to increase endurance time, further research shows it may actually blunt the effect of creatine, a popular and well-researched compound known for its consistent ergogenic effects. In a study evaluating the effect of pre-exercise caffeine ingestion on both creatine stores and high-intensity exercise performance, caffeine totally counteracted any effects of creatine supplementation. It was suggested that individuals who creatine load should refrain from caffeine-containing foods and beverages if positive effects are desired.

The Downside of Caffeine
Despite coffee/caffeine’s positive effects on psychological states and performance, there are numerous documented risks that must considered when consuming caffeine, whether for performance-enhancing effects or simply as a part of daily dietary consumption.

Caffeine stimulates the central nervous system and can produce restlessness, headaches, and irritability. Caffeine also elevates your heart rate and blood pressure. Over the long-term as your body gets used to caffeine, it requires higher amounts to get the same effects. Certainly, having your body in a state of hormonal emergency all day long isn’t very healthy.

Caffeine is also a diuretic and causes a loss of fluid, which then leads to a dehydrating effect. This is obviously not conducive to fitness activities such as resistance training, as fluid is needed for the transfer of nutrients to facilitate muscular growth. It is also important when considering the further loss of fluid while exercising in hot environments.

Perhaps the most important long-term problem is the effect of caffeine on sleep. The half-life of caffeine in the body is about 6 hours. If you drink a big cup of coffee with 200 mg of caffeine at 4PM, at 10PM you still have about 100mg in your body. By 4AM, you still have 50mg floating in your system. Even though you may be able to sleep, you may not be able to obtain the restful benefits of deep sleep. What’s worse, the cycle continues as you may use more and more caffeine in hopes of counteracting this deficit.

Caffeinated Conclusions…
Though caffeine has some benefits in relation to exercise performance, risks have been documented. Most problems seem evident with very high consumption. The American Heart Association says that moderate coffee drinking (one or two cups per day) does not seem to be harmful for most people. As with everything else, moderation is the key to healthy caffeine consumption. Further research is needed to clearly determine whether the performance-enhancing benefits of caffeine outweigh the potential risks.

Friday, September 25, 2009

What exactly is Caffeine?


What exactly is caffeine? It is a colorless, somewhat bitter substance that is found in coffee, tea, chocolate and cola. It is also in many over- the-counter medicines and in many diet/weight loss supplements. It is a stimulant and it is considered a psychoactive drug. It is the most widely consumed drug in this country. Drug makers are required by law to list the amount of caffeine in their product, however, food and beverage companies do not have to. The caffeine that is taken out of coffee beans to produce decaffeinated coffee is then sold to drug companies and soft drink manufacturers.

It can be a welcome waker-upper in the morning taken in that morning cup of coffee. It also helps give some a boost to stay awake late in the day. However, the boost isn't necessarily instant as it takes about an hour for the effects of caffeine to make it's way through the bloodstream and into the system. It has benefits and it has side effects. It helps keep us alert. It stimulates the central nervous system. Some say it improves physical and mental performance. It has diuretic activity. Some studies list is as a mood elevator, and a pain reliever. Because of the increased alertness levels of those who consume caffeine, there has been improved performance in activities such as test-taking, driving, flying and problem solving.

There are side effects of caffeine though. Those are insomnia, nervousness, increased tension and anxiety-panic attacks, just from drinking the amount of 300 mg. The amount that causes these side effects vary from individual to individual, however, children seem to have a lower tolerance of it because of their lower body weight. The Food and Drug Administration advises pregnant women to avoid it altogether. The FDA does list it as a "safe food additive", even though pregnant women should avoid it. For those that take it regularly every day, going without it a day can cause withdrawal symptoms such as, headaches, irritability, a lack of energy and of course, sleepiness. These withdrawal symptoms are short lived though.

The following is a chart and the amount of caffeine in products you use and consume daily.
• 6 ounce cup of coffee - 64mg to 150mg
• 5 ounce cup of tea- 40mg
• 12 ounce can of cola- 40mg
• Hot cocoa - 1 cup 4mg
• 6 ounce chocolate bar 25mg
• 2 Excedrin tablets 130mg

Besides weight loss products and stay awake products and energy drinks, caffeine is being tested for pesticide use and it has been laced in women's panty hose for its constrictive effects that are supposed to shrink thighs. Love it or hate it, caffeine is and always has been a big part of American culture and probably is here to stay.

Wednesday, September 23, 2009

Caffeine Effects on Your Body


Caffeine is big business. There are new coffee shops popping up all over the place. You can’t go far without running into a Starbucks. "Let’s get together for coffee. Time for a coffee break. Coffee pot goes off before my feet hit the floor. Travel mugs for sipping coffee on your way to work. I’ll just have this chocolate bar to pick me up this afternoon." Caffeine - It’s everywhere! It’s everywhere!

Many people have grown so accustomed to having their morning coffee or soda that they don’t even consider the damaging effects caffeine has on the body. On the contrary, most will tell you
that they NEED their jolt to get them moving in the morning or to keep them upright throughout the day. Caffeine is present not only in coffee, but also tea, soda, chocolates and in certain pain relievers, such as aspirin or acetaminophen. It is also sometimes used in combination with an antihistamine to overcome the drowsiness caused by the antihistamine.

If you don’t think it’s addicting, try going off caffeine, cold turkey. See if you don’t have a headache for two to nine days. That’s caffeine withdrawal! You don’t need to be a coffeeholic to experience negative physical symptoms. Even as little as one to two cups a day can negatively affect you.

You may be experiencing a number of physical ailments that could be caused solely from affeine. The most common side effects of caffeine include dizziness, headache, irritability, muscle tension, nausea, nervousness, stuffy nose, unusual tiredness and jitters.

Too much (overdose) of caffeine can give you all sorts of grief such as stomach pain agitation, anxiety, restlessness, confusion, seizures, dehydration, faster breathing rate, fast heartbeat, fever, frequent urination, increased sensitivity to touch or pain, irritability, muscle trembling or twitching, vomiting, sometimes with blood, fibrocystic breast disease, ringing or other sounds in ears, seeing flashes of “zig-zag” lights, and trouble in sleeping. If you are diabetic or insulin resistant, caffeine causes your body to produce more insulin and you don’t want that. Caffeine makes all aspects of a menstrual cycle worse. Isn’t that bad enough some months?

The next time you experience any of the above symptoms, try cutting back on caffeine. That may be all it takes to take care of the problem. Reduce caffeine intake gradually to prevent any symptoms of withdrawal. Cut back on your intake or combine a mixture of caffeinated and decaffeinated beverages until you’re totally weaned off. People can, and do, survive ridding their bodies of all caffeine. And they’re feeling much better for it!

The information contained in this article is for educational purposes only and is not intended to medically diagnose, treat or cure any disease. Consult a health care practitioner before beginning any health care program.