W6-L1: Hydration & Caffeine

Question 1

NTK

What are some of the essential functions of water?(8)

Answer 1

Question 2

What is EU Hydration?

Answer 2

the Hydration needed for all cells

Question 3

Water Approximations of Different Organs

Answer 3

MAX 72 hours w/o water in ambient temperature before death

Question 4

What are Examples of Water
Inputs and Outputs?

Answer 4

EU-Hydrated States

Question 5

What are the factors that affect an individual need for fluids? (6)

Answer 5

1. Body size and composition
2. Physical activity
3. Environmental: heat & altitude
4. Health status (Kidney+Liver Function)
5. Medications
6. Some herbal supplements

Question 6

How do body size, composition and physical activity affect fluid need?

Answer 6

Lower Body Fat % needs more water
Higher Muscle % needs more water

Question 7

How do herbal supplements affect bodies needs for fluids?

Answer 7

Herbal Supplements increase urine output

• good for weight loss

Question 8

What is the RDA for FLUIDS?

Fluids does not mean just water

Answer 8

F: 2.7 L / day
M: 3.7 L / day

Question 9

How does Caffeine Work?

Answer 9

1. Crosses the Blood-Brain Barrier

• Caffeine is fat-soluble, allowing it to pass quickly into the brain and affect the central nervous system

2. Adenosine Receptor Antagonist

• Blocks adenosine receptors, keeping you feeling alert & energized.
• Adenosine promotes sleepiness and relaxation.

3. Increases Neural Activity

• Stimulates the release of dopamine & norepinephrine, increasing focus, concentration, and wakefulness
• Also impacts serotonin, potentially improving mood and motivation.

Question 10

When is the effect of caffeine at Peak levels?

Answer 10

45 minutes after consumption

Question 11

What is the Half-Life of Caffeine

Answer 11

5 hours (large range —caffeine can affect your body for several hours)

Question 12

How is their genetic variability in the
effect of caffeine?

Answer 12

Genetic variability in the activity of CYP1A2 among individuals.

Some people are “fast metabolizers”, while others are “slow metabolizers” of caffeine.

Question 13

What is the RDA for caffeine?

Answer 13

Question 14

Examples of Food with Caffeine:

Answer 14

Question 15

What are Energy drinks?
What are some core ingredients?

Answer 15

beverages containing stimulants (usually caffeine) marketed as products that enhance mental and physical performance.

Often include other ingredients like ginseng, taurine, and sometimes herbal extracts.
(issues with sleep)

• Regular use, may mask poor nutritional practices or underlying health concerns (issues with sleep)

Question 16

Is caffeiene a diuretic?

Answer 16