how much caffeine is too much for teenager?
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For kids and teens, the American Academy of Pediatrics suggests caution. Adolescents ages 12 to 18 should cap daily caffeine intake at 100 mg (the equivalent of about one cup of coffee, one to two cups of tea, or two to three cans of soda). For children under 12, there's no designated safe threshold.
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According to the FDA, most people consume about 200 mg of caffeine each day (the amount in one to two five-ounce cups of coffee) — and 600 mg or more is considered too much. To put this in perspective, one Starbucks Venti Coffee (20 fl. oz.) contains about 415 mg of caffeine.
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How much is too much? And how, exactly, does caffeine interfere with sleep? In terms of how much caffeine you should have, the general consensus is that up to 500 milligrams per day—or roughly the equivalent of four eight-ounce cups of brewed coffee—is safe for adults.
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Studies show that getting more than 150–200 milligrams (about 1–2 cups of coffee) of caffeine a day during pregnancy may not be healthy. High amounts of caffeine during pregnancy has been linked to problems with a baby's growth and development.
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Be strategic with your coffee or energy drink and you'll get an extended boost in alertness. Most people need about 100 milligrams (mg) to 200 mg of caffeine, depending on their body weight, Rosekind says.
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. A large serving size contains 30 fluid ounces and 180 milligrams of caffeine, which is within the range of moderate caffeine consumption considered safe. A small iced tea, or 16 fluid ounces, has 96 milligrams of caffeine, and a medium, or 21 fluid ounces, has 126 milligrams of caffeine.
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Most people need about 100 milligrams (mg) to 200 mg of caffeine, depending on their body weight, Rosekind says. (Coffee has about 100 mg of caffeine in a 5-ounce cup, though the content varies based on the strength of the brew.) Over-the-counter caffeine pills also are available in 100 mg or 200 mg doses.
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Order a large cappuccino (which is not an especially common option) and you're likely to consume 3 ounces of espresso, or 120-192 mg of caffeine.
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According to the NHS, if you're pregnant, you should really limit the amount of caffeine you consume to 200 milligrams (mg) a day, which is the equivalent of one cup of filter coffee or 2 cups of instant coffee. This is where decaf can really come into its own.
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So it's best to limit the amount you get each day. If you're pregnant, limit caffeine to 200 milligrams each day. This is about the amount in 1½ 8-ounce cups of coffee or one 12-ounce cup of coffee.
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Coffee itself won't instantly make you feel tired, but the caffeine it contains may actually lead to fatigue after regularly drinking it over time. If you stick to 400 mg of caffeine per day or less and go easy on the added sugar, you should reap the benefits of caffeine and avoid its drawbacks.
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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.
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Positive Effects A normal dose of caffeine is about 50 mg to 200 mg. Caffeine works best when you take it on an intermittent, off-and-on basis. Higher doses can have much more potent effects. A dose of 500 mg or 600 mg of caffeine can affect you much like a low dose of an amphetamine.
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As for most adults, up to 400 milligrams of caffeine a day appears to be safe, according to the Mayo Clinic. "Healthy adults who choose to drink energy drinks should not exceed one can per day," the Mayo Clinic's Zeratsky said.
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Having a few cups of coffee or other caffeinated drinks a day is considered perfectly safe. But drinking too much or lots in a short space of time is risky. You can overdose on caffeine and it is possible to die if you ingest too much. Up to 400mg of caffeine a day appears to be safe for most healthy adults.
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As long as caffeine intake doesn't go too much beyond the upper recommended level of 400 mg per day, it should be safe for most people. On the other hand, some individuals are very sensitive to caffeine's effects and should consume it in very small amounts or avoid it altogether.
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The bottom line: Be cautious about using caffeine products to help with weight loss. When used in moderation (400 milligrams or less) by healthy adults, caffeine is generally safe.