Lecture 18 Flashcards
what is coffee
bev made from seeds of coffea plant (coffea arabica)
coffee ingredients
- caffeine
- phenolic substances
- antioxidants
caffeine
- a stimulant
- most commonly consumed drug in the world
2/3 canadians consume
at least 1 cup of coffee / day
avg intake of coffee
3 cups / day
caffeine is rapidly
absorbed in GI tract
physical effects of caffeine
- irritability
- nervousness
- restlessness
- insomnia
- heart palpitations
caffeine dependency causes
lower nutrient supply (ex: glucose & o2 to brain)
caffeine is sufficiently lipophilic so it passes..
through all biological membranes + regularly crosses the blood - brain barrier (the brain)
caffeine is metabolized in
liver
it takes how many hours for caffeine to leave your system ?
8-10 hours
caffeine excretion in
kidneys
caffeine hypertension causes
⬆️ blood pressure for ~3hrs
caffeine may ⬆️ .. (bone health)
urinary exertion of Ca.
- may encourage absorption of Ca (small effect)
those who consume caffeine + have lower than recommended intakes of Ca + have …
⬇️ bone mineral density are @ ⬆️ risk of poor bone health
caffeine crosses ..
placenta so if u drink it, so does ur baby