Lecture 18

Question 1

what is coffee

Answer 1

bev made from seeds of coffea plant (coffea arabica)

Question 2

coffee ingredients

Answer 2

• caffeine
• phenolic substances
• antioxidants

Question 3

caffeine

Answer 3

• a stimulant

- most commonly consumed drug in the world

Question 4

2/3 canadians consume

Answer 4

at least 1 cup of coffee / day

Question 5

avg intake of coffee

Answer 5

3 cups / day

Question 6

caffeine is rapidly

Answer 6

absorbed in GI tract

Question 7

physical effects of caffeine

Answer 7

• irritability
• nervousness
• restlessness
• insomnia
• heart palpitations

Question 8

caffeine dependency causes

Answer 8

lower nutrient supply (ex: glucose & o2 to brain)

Question 9

caffeine is sufficiently lipophilic so it passes..

Answer 9

through all biological membranes + regularly crosses the blood - brain barrier (the brain)

Question 10

caffeine is metabolized in

Answer 10

liver

Question 11

it takes how many hours for caffeine to leave your system ?

Answer 11

8-10 hours

Question 12

caffeine excretion in

Answer 12

kidneys

Question 13

caffeine hypertension causes

Answer 13

⬆️ blood pressure for ~3hrs

Question 14

caffeine may ⬆️ .. (bone health)

Answer 14

urinary exertion of Ca.

- may encourage absorption of Ca (small effect)

Question 15

those who consume caffeine + have lower than recommended intakes of Ca + have …

Answer 15

⬇️ bone mineral density are @ ⬆️ risk of poor bone health

Question 16

caffeine crosses ..

Answer 16

placenta so if u drink it, so does ur baby

Question 17

⬆️ amounts of caffeine may increase risk of

Answer 17

low birth weight + preterm birth

Question 18

recommendation of caffeine during pregnancy ..

Answer 18

300 mg/day

Question 19

caffeine was added to WADA monitoring programs as it is

Answer 19

a previous banned substance

Question 20

caffeine recommendation for women of childbearing age

Answer 20

<300 mg/day

Question 21

caffeine recommendation for adults

Answer 21

<400 mg/day

Question 22

caffeine recommendation in cups

Answer 22

2-4 cups / day

Question 23

antioxidants …

Answer 23

reverse oxidation + repair cell damage

Question 24

coffee also contains

Answer 24

• niacin (b vit)
• potassium
• magnesium

Question 25

66% of antioxidants come from

Answer 25

coffee

Question 26

oxidation

Answer 26

when elections are taken off of atoms

Question 27

downside of oxidation

Answer 27

- can damage cells / tissues + their DNAs | - free radicals are created

Question 28

antioxidants prevent

Answer 28

or reverse oxidation + fix cell damage

Question 29

coffee lowers risk of

Answer 29

- type 2 diabetes - some cancers - parkinson’s disease - liver disease

Question 30

coffee causes concerns of

Answer 30

sleep - mental health - pregnant women - bone health - and children

Question 31

what is tea

Answer 31

soaked leaves of tea plant camellia dinensis

Question 32

black tea

Answer 32

leaves are picked and oxidized (fermented), and dried

Question 33

green tea

Answer 33

leaves are not oxidized

Question 34

what’s in tea

Answer 34

- caffeine - antioxidants - tanins

Question 35

antioxidant in tea

Answer 35

catechin (a polyphenol)

Question 36

catechin ..

Answer 36

protects against oxidative stress - ⬆️ content in white + green teas - black tea still contains a lot

Question 37

other beneficial compounds jn tea

Answer 37

L-theanine: a non protein AA derivative - has calming effect - helps strengthen immune system

Question 38

tannis in tea can bind

Answer 38

non-nome Fe in digestive tract 2 inhibit absorption (from non animal based food)

Question 39

too much tea can cause

Answer 39

Fe-deficiency anemia

Question 40

tea improves

Answer 40

- cardiovascular health - ⬇️ blood pressure by protecting health of blood vessels - small ⬆️ in energy expidenture - bone loss - cavities - improves immune system + mental activity