HETSH يتحدى الملل
اهلا بك عزيزى الزائر..اذا كنت عضو تفضل بالدخول (اضغط على دخول) واذا كنت زائر يشرفنا انضمامك لنا (اضغط على تسجيل) ..اهلا بك فى بيتك ونتمنى ان تقضى معنا اسعد الاوقات

لقد نسيت كلمة السر


نتائج البحث

Rechercher بحث متقدم

المواضيع الأخيرة
» فيلم Numb رومانسى للكبار فقط مشاهدة مباشرة
12/26/2013, 3:11 am من طرف سمير المغربي

» Laparoscopic Reconstructive Urology
5/2/2013, 8:52 pm من طرف sheto

» Atlas of Urinary Cytopathology With Histopathologic Correlations
5/2/2013, 8:51 pm من طرف sheto

» Thyroid Disease in Adults - 2011 Edition
5/2/2013, 8:50 pm من طرف sheto

» Echo Easy Made
5/2/2013, 8:48 pm من طرف sheto

» Atlas of Metabolic Diseases (2nd Edition)
5/2/2013, 8:47 pm من طرف sheto

» Endocrine Physiology, Third Edition (LANGE Physiology Series)
5/2/2013, 8:45 pm من طرف sheto

5/2/2013, 8:44 pm من طرف sheto

» 100 Questions & Answers About Diabetes (100 Questions & Answers Series)
5/2/2013, 8:43 pm من طرف sheto

المتواجدون الآن ؟
ككل هناك 0 عُضو متصل حالياً 0 عضو مُسجل, 0 عُضو مُختفي و 0 زائر :: 1 روبوت الفهرسة في محركات البحث

لا أحد

[ مُعاينة اللائحة بأكملها ]

أكبر عدد للأعضاء المتواجدين في هذا المنتدى في نفس الوقت كان 77 بتاريخ 11/30/2011, 8:35 pm
أفضل 10 أعضاء في هذا المنتدى
ina we bas
محمد احمد
سعيد المصري
علي الزين

تسجيل صفحاتك المفضلة في مواقع خارجية

تسجيل صفحاتك المفضلة في مواقع خارجية digg  تسجيل صفحاتك المفضلة في مواقع خارجية delicious  تسجيل صفحاتك المفضلة في مواقع خارجية reddit  تسجيل صفحاتك المفضلة في مواقع خارجية stumbleupon  تسجيل صفحاتك المفضلة في مواقع خارجية slashdot  تسجيل صفحاتك المفضلة في مواقع خارجية yahoo  تسجيل صفحاتك المفضلة في مواقع خارجية google  تسجيل صفحاتك المفضلة في مواقع خارجية blogmarks  تسجيل صفحاتك المفضلة في مواقع خارجية live      

قم بحفض و مشاطرة الرابط HETSH يتحدى الملل على موقع حفض الصفحات

قم بحفض و مشاطرة الرابط HETSH يتحدى الملل على موقع حفض الصفحات

هذا المنتدى يتوفر على 1699 عُضو.
آخر عُضو مُسجل هو alaa ahmed فمرحباً به.

أعضاؤنا قدموا 432 مساهمة في هذا المنتدى في 285 موضوع
تدفق ال RSS


موسوعة كاملة لكل مسلم يحب دينه

4/29/2010, 12:55 am من طرف محمد احمد

السلام عليكم ورحمة الله وبركاته

اليوم اقدم لكم

موسوعه شامله لكل مسلم يحب دينه _ ساعد على نشرها واكسب اجر كبير


تحتوي الموسوعه على التالى :-

1-التاريخ الإسلامى بالكامل


تعاليق: 0

سحابة الكلمات الدلالية

Caffeine and its problems

اذهب الى الأسفل

Caffeine and its problems

مُساهمة من طرف sheto في 3/31/2011, 1:28 am


It's 11 PM and Aaron has already had a full day of school, work, and
after-school activities. He's tired and knows he could use some sleep.
But he still hasn't finished his homework. So he reaches for his
headphones — and some caffeine.

What Is Caffeine?

Caffeine is a drug that is naturally produced in the leaves and seeds
of many plants. It's also produced artificially and added to certain
foods. Caffeine is defined as a drug because it stimulates the central
nervous system, causing increased alertness. Caffeine gives most people a
temporary energy boost and elevates mood.

Caffeine is in tea, coffee, chocolate, many soft drinks, and pain
relievers and other over-the-counter medications. In its natural form,
caffeine tastes very bitter. But most caffeinated drinks have gone
through enough processing to camouflage the bitter taste.

Teens usually get most of their caffeine from soft drinks and energy
drinks. (In addition to caffeine, these also can have added sugar and
artificial flavors.) Caffeine is not stored in the body, but you may
feel its effects for up to 6 hours.
Got the Jitters?

Many people feel that caffeine increases their mental alertness.
Higher doses of caffeine can cause anxiety, dizziness, headaches, and
the jitters. Caffeine can also interfere with normal sleep.

Caffeine sensitivity (the amount of caffeine that
will produce an effect in someone) varies from person to person. On
average, the smaller the person, the less caffeine needed to produce
side effects. Caffeine sensitivity is most affected by the amount of
caffeine a person has daily. People who regularly take in a lot of
caffeine soon develop less sensitivity to it. This means they may need
more caffeine to achieve the same effects.

Caffeine is a diuretic, meaning it causes a person to urinate (pee)
more. It's not clear whether this causes dehydration or not. To be safe,
it's probably a good idea to stay away from too much caffeine in hot
weather, during long workouts, or in other situations where you might
sweat a lot.

Caffeine may also cause the body to lose calcium, and that can lead
to bone loss over time. Drinking caffeine-containing soft drinks and
coffee instead of milk can have an even greater impact on bone density
and the risk of developing osteoporosisosteoporosis.

Caffeine can aggravate certain heart problems. It may also interact
with some medications or supplements. If you are stressed or anxious,
caffeine can make these feelings worse. Although caffeine is sometimes
used to treat migraine headaches, it can make headaches worse for some
Moderation Is the Key

Caffeine is usually thought to be safe in moderate amounts. Experts
consider 200-300 mg of caffeine a day to be a moderate amount for
adults. But consuming as little as 100 mg of caffeine a day can lead a
person to become "dependent" on caffeine. This means that someone may
develop withdrawal symptoms (like tiredness, irritability, and
headaches) if he or she quits caffeine suddenly.

Teens should try to limit caffeine consumption to no more than 100 mg
of caffeine daily, and kids should get even less. The following chart
includes common caffeinated products and the amounts of caffeine they

Amt. of Drink/Food
Amt. of Caffeine
SoBe No Fear
8 ounces
83 mg
Monster energy drink
16 ounces
160 mg
Rockstar energy drink
8 ounces
80 mg
Red Bull energy drink
8.3 ounces
80 mg
Jolt cola
12 ounces
72 mg
Mountain Dew
12 ounces
55 mg
12 ounces
54 mg
Diet Coke
12 ounces
45 mg
12 ounces
38 mg
12 ounces
0 mg
Brewed coffee (drip method)
5 ounces
115 mg*
Iced tea
12 ounces
70 mg*
Cocoa beverage
5 ounces
4 mg*
Chocolate milk beverage
8 ounces
5 mg*
Dark chocolate
1 ounce
20 mg*
Milk chocolate
1 ounce
6 mg*
Jolt gum
1 stick
33 mg
Cold relief medication
1 tablet
30 mg*
1 tablet
200 mg
Excedrin extra strength
2 tablets
130 mg
*denotes average amount of caffeine

Source: U.S. Food and Drug Administration, National Soft Drink Association, Center for Science in the Public Interest.
Cutting Back

If you're taking in too much caffeine, you may want to cut back. The
best way is to cut back slowly. Otherwise you could get headaches and
feel tired, irritable, or just plain lousy.

Try cutting your intake by replacing caffeinated sodas and coffee
with noncaffeinated drinks. Options include water, decaffeinated coffee,
caffeine-free sodas, and caffeine-free teas. Start by keeping track of
how many caffeinated drinks you have each day, then substitute one of
these daily drinks with a caffeine-free alternative. Continue this for a
week. Then, if you are still drinking too much caffeine, substitute
another of your daily drinks, again, keeping it up for a week. Do this
for as many weeks as it takes to bring your daily caffeine intake below
the 100-milligram mark. Taking a gradual approach like this can help you
wean yourself from caffeine without unwanted side effects like

As you cut back on the amount of caffeine you consume, you may find
yourself feeling tired. Your best bet is to hit the sack, not the sodas:
It's just your body's way of telling you it needs more rest. Your
energy levels will return to normal in a few days.

Reviewed by: Mary L. Gavin, MD
Date reviewed: January 2008
Originally reviewed by: Jessica Donze Black, RD, CDE, MPH

سوبر ستار
سوبر ستار

عدد الرسائل : 295
تاريخ التسجيل : 09/12/2008

معاينة صفحة البيانات الشخصي للعضو

الرجوع الى أعلى الصفحة اذهب الى الأسفل

الرجوع الى أعلى الصفحة

- مواضيع مماثلة

صلاحيات هذا المنتدى:
لاتستطيع الرد على المواضيع في هذا المنتدى