How coffee causes exhaustion, fatigue and addiction, Pt 2

The experts speak on caffeine, exhaustion and fatigue:

"Caffeine’s immediate effects on your body"

It doesn’t take a genius to see that there might be a downside to all of this neuron activity. In fact, uncontrolled neuron firing creates an emergency situation, which triggers the pituitary gland in the brain to secrete ACTH (adrenocorticotrophic hormone). ACTH tells the adrenal glands to pump out stress hormones—the next major side effect of caffeine.
Caffeine Blues By Stephen Cherniske MS, page 56

Within five minutes after you drink your morning coffee, the caffeine begins to stimulate your central nervous system, triggering the release of stress hormones in your body, causing a stress ("fight or flight" ) response. The stress hormones are useful if you need to prepare yourself to fight or flee a dangerous situation, but if you are simply sitting at your desk you may feel a short charge of alertness, quickly followed by feelings of agitation. Within the next hour or so, after the stress response dissipates, you will probably feel more tired and hungry. At these low-energy times, many people reach for another cup of coffee, or eat a snack that is often high in sugar to "pep up" and stay alert. However, both caffeine and sugar only give you temporary feelings of increased energy, which quickly dissipate. For some people, this cycle of low energy followed by an infusion of caffeine or food continues the entire day — leaving them feeling exhausted and unable to focus by 3:00 p.m. because they are drained from the ups and downs in energy their body endured throughout the day.
Active Wellness By Gayle Reichler MS RD CDN, page 12

Among other things, it stimulates the production of adrenaline, one of the hormones secreted by the adrenal glands to help us in extreme emergency situations. Our adrenals evolved to give our early ancestors the extra strength and alertness needed to escape a saber tooth tiger attack, but we don’t often need that much adrenaline these days. Like sugar, coffee constantly stimulates the production of adrenaline, putting excessive wear and tear on the adrenal glands. And let’s not forget that green tea and black tea contain caffeine, and even decaf still contains some caffeine. If you’re sensitive to caffeine it can keep you awake at night even if you haven’t had any since noon. If you’re suffering from insomnia, your best bet is to drink nonstimulating herbal teas such as chamomile or mint in the evening. If you need a boost in the afternoon, try a cup of ginseng tea.
Prescription Alternatives by Earl Mindell RPh PhD and Virginia Hopkins MA, page 388

Caffeine triggers a stress response that involves a surge in adrenal hormones and the classic fight-or-flight "emergency," affecting virtually every cell in the body.
Caffeine Blues By Stephen Cherniske MS, page 98

Everybody "knows" that caffeine makes you more alert and clearheaded. Think again. A cup of coffee gives you a wakeup jolt because it triggers a stress response. Your adrenal glands are prompted to kick out the same stress hormones that are released when you perceive an external threat or danger. Your muscles tense, your blood sugar elevates for extra energy, your pulse and respiration rates speed up, and your state of alertness increases so you’re ready to wrestle with or run from environmental dangers. You may be only sitting at your table or desk drinking a cup of coffee, but your body doesn’t know that. It’s preparing for action.
The Memory Solution by Dr Julian Whitaker, page 261

Caffeine increases the stimulating neurohormone, noradrenaline, and reduces the calming neurotransmitter, serotonin.
The Crazy Makers by Carol Simontacchi, page 191

Caffeine also stimulates the production of norepinephrine, another stress hormone that acts directly on the brain and nervous system. Epinephrine and norepinephrine are responsible for increased heart rate, increased blood pressure, and that "emergency" feeling. In fact, the emergency is quite real. caffeine can trigger a classic fight-or-flight stress reaction with all of the results listed in Illustration.
Caffeine Blues By Stephen Cherniske MS, page 57

I particularly recommend that you avoid caffeine. What caffeine actually does is set off a stress response. It stimulates your adrenal glands to make epinephrine and norepinephrine—the same stress hormones that are produced in response to any stressor. This sets the stress response in motion, causing tense muscles, elevated blood sugar, and increased pulse and respiration. You may feel mentally sharper because your brain is high on adrenaline. It’s ready to rumble. One cup of coffee for most people isn’t damaging. But as you may recall from our discussion of the three stages of the stress response, if stress hormones remain elevated, the body is thrown into a state of chronic stress. By sipping on coffee, tea, or caffeinated soda all day long, you are forcing your adrenal glands to continue to pump out stress hormones.
The Memory Solution by Dr Julian Whitaker, page 165