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www.mayoclinic.org/.../in-depth/caffeine/art-20049372

But do you know the caffeine content of your favorite drink? You may want to take a look at just how much caffeine you get in a typical day, especially if you're bothered by headaches, restlessness or anxiety. If your caffeine habit totals more than 400 milligrams (mg) a day, you may want to consider cutting back.

www.thespruceeats.com/caffeine-in-coffee-tea-cola-765276

This guide outlines how much caffeine is in each of these drinks, including decaf coffee and tea, sodas, popular energy drinks, bottled iced teas, Starbucks coffees, herbal teas (or tisanes), and more.Caffeine is measured in milligrams (mg). For healthy adults, the FDA says consuming up to 400 milligrams per day is not generally associated with negative effects.

www.everydayhealth.com/columns/health-answers/how-much...

How Much Caffeine Are You Really Drinking? ... even for people who drink coffee regularly and have developed some tolerance to caffeine. But even 40 mg of caffeine — about the amount in a cup of ...

www.drugs.com/mca/caffeine-how-much-is-too-much

How much is too much? Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks. Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks.

www.nutritionadvance.com/how-much-caffeine-is-in-cup-of...

Some additional brands have provided information on the caffeine content of their tea; Tetley’s black tea contains “40 to 50 mg” and PG Tips contains 40 mg per average cup (4, 5).As you can see from the table above, it isn’t merely a matter of how much caffeine is in one teabag of black tea.

cspinet.org/eating-healthy/ingredients-of-concern/caffeine...

Many coffee drinkers experience withdrawal symptoms, such as headaches, irritability, sleepiness, and lethargy, when they stop drinking coffee. Like any drug, the effects of caffeine on the body are not wholly good or bad. But exactly how much caffeine is there in the food and beverages you consume?

www.quora.com/Is-45-mg-of-caffeine-too-much

45 mg isn’t really much, however, depending on how much caffeine your body typically intakes, it could affect you differently. 45 mg is less than a single shot of espresso, and approximately a third of a small cup of coffee.

answers.yahoo.com/question/index?qid=20081008140003AAXDRro

The Crystal Light Energy has 60 mg of caffeine in each packet and I'm just wondering how much that is. Preferably compared to a cup of coffee. Or anything else.

www.webmd.com/food-recipes/news/20121025/how-much-caffeine...

Oct. 25, 2012 -- How much caffeine is in your energy drink? Don't count on finding out by reading the product label, a Consumer Reports (CR) investigation finds. The consumer group tested 27 ...

www.runtricities.org/html/WebArticles/Caffeine.htm

Caffeine: How Much is too Much? By Dr. Ruth Ketron . Caffeine: -Alkaloid -Odorless -slightly bitter -mild stimulant in moderation -increases urination, heart rate and rhythm-excessive intake can cause restlessness, insomnia, heart irregularities, and delirium.