Presentation on theme: "Caffeine By Charlene Friesen and Tiffany Kirk. What Is Caffeine? Occurs naturally in some substances, like coffee beans, teas leaves, cocoa beans, guarana."— Presentation transcript:
What Is Caffeine? Occurs naturally in some substances, like coffee beans, teas leaves, cocoa beans, guarana and mate. Its pure form is a white, bitter, crystal powder that is isolated from decaffeinating coffee and tea. Classified as both a psychoactive drug and a food.
How much caffeine is consumed? 80 to 90% of North Americans consume caffeine everyday The average North American consumes 300- 1000mg per day A safe dose is 300mg/day (3 cups coffee) Over 600mg per day is considered excessive (more than 4 cups of coffee or 15 cups of tea) A lethal dose is 7,500-10,000mg (50-200 cups of coffee)
How Does Caffeine Work in the Body? It interferes with the calming effects of the neurotransmitter adenosine. It causes a release of epinephrine, dopamine, serotonin which are the excitatory neurotransmitters. This makes your body think this is an emergency, and your body responds by: Pupils dialate Airways dialate to increase oxygen capacity Heart rate increases Extremities get cold as surface blood vessels contract to carry blood to muscle and brain
Blood pressure rises Blood to the stomach, bladder and intestines slows Liver releases glycogen for extra energy Muscles contract for action When the effects of caffeine wear off, adrenaline wears off, and you feel tired or depressed It stimulates the pleasure centers of the brain, causing addiction using the same channels as amphetamines, cocaine and heroin, but with less effect
Caffeine’s half life is six hours, so that a coffee containing 200mg of caffeine consumed at 3pm will still have 100mg caffeine in your bloodstream at 9pm and be fully excreted at 3 am Caffeine reaches its peak concentrations in your body within 30 to 60 minutes after consumption
What are the side effects of Caffeine? THE GOOD… May protect against diabetes Enhances alertness Enhances physical performance and endurance Increases efficacy of certain pain killers May reduce colon cancer Increases metabolism Fewer suicides noted in those addicted to caffeine
THE BAD…. Mild diuretic causing dehydration Cardiac and nervous stimulant Causes addiction Prevents deep sleep and causes insomnia Headache Anxiety Increase risk of miscarriage, birth defects and low birth weight It crosses into breast milk and effects babies negatively Causes calcium depletion from the bones Increases sensitivity to pain
Addiction and Withdrawal You are considered addicted to caffeine if you feel that cannot function without it, and must consume it everyday Withdrawal symptoms include headache, irritability, nervousness, restlessness and exhaustion. In extreme cases, nausea and vomiting Symptoms begin within 12-24 hours after discontinuing caffeine usage, and peaks after 20-48 hours
How Can I Quit? Caffeine Fading: reducing the amount of coffee by about ½ cup per day. Make sure you have other beverages available, like herbal tea, but do not drink decaff coffee, as it is also addictive. Cold Turkey: The withdrawal symptoms can be painful this way, but can be counter-acted by lots of sleep and exercise. Or, drink a coke if you just can’t take it.
Caffeine Survey How much caffeine do you typically consume a day?
Typical Amounts of Caffeine Brewed Coffee:100-160mg/200ml Instant Coffee: 64mg/200ml Espresso/cappuccino/latte: 30-50mg/2tbsp or about 300-500 mg/ mug Tea: 40-70mg/200ml Colas: 50mg/can Jolt: 70mg/can * Barq’s root beer: 25.4 mg/can Chocolate milk: 50mg/250ml Chocolate bar: 30mg/bar Tylenol #3: 45mg/tablet Excedrin: 65mg/tablet Pep Pill: 100-200mg/pill