6.3 Stress & Caffeine*

Adenosine

Adrenaline

Estrogen

Builds up as we use energy, which makes you tired

Indicates that we are stressed

Indicates that we are sick

Low levels of adenosine

High levels of cortisol

Low levels of cortisol

Caffeine blocks adenosine from being received in the brain

Caffeine increases the amount of adenosine

Caffeine increases our cortisol levels

The body has too much adenosine

The body does not have time to heal, rest and digest

The body does not have enough cortisol

Adenosine gives us more energy

Adenosine builds up as we use energy

Adenosine creates high levels of stress

Increasing

Decreasing

Lowering

NOT tired, because his brain is receiving more adenosine

NOT tired, because caffeine blocks his brain from receiving adenosine

Tired, because he is using too much energy

It gives the body extra energy to respond to stress

It helps the body rest and digest

It helps the body calm down