Fact: Caffeine (withdrawal) can cause headaches
Fact: Caffeine is used in medicine to relieve headaches

Question: How can two seemingly opposite statements be true?

Answer: The dosage, or amount, of caffeine used/consumed, may be the reason that both “facts” can be true (although this is debatable among experts).

Caffeine is a common ingredient in many over-the-counter (OTC) headache medications. The reason? Caffeine additives make pain relievers 40% more effective in treating headaches, and helps the body absorb the medication more quickly.

(HealthDay News) -- If you have trouble falling or staying asleep, it's important to understand the reasons for your insomnia.

Here's a list of possible reasons for your sleepless nights, courtesy of the U.S. National Library of Medicine:

* Discomfort or illness.
* Depression.
* Stress or anxiety.
* Drinking caffeine or alcohol, smoking, or taking certain medications or illicit drugs.
* An inappropriate sleep environment, including one that's too bright or too noisy.
* Related activities that affect your sleep, such as taking naps or going to bed too early.

So, I found out about this term -- HSP or Highly Sensitive People a few days ago when I was chatting with a friend about her son heading off to Kindergarten. She said she was worried about how he would react to his new environment because "he's so sensitive." That's when she dropped HSP on me.

Apparently, between 15 and 20 percent of the population is considered highly sensitive which means their nervous systems process stimuli at a much higher rate -- sometimes up to 10 times more -- than the rest of the population.

I just read a helpful post about the differences between green and white tea, and it made me realize I also have some tea questions! Here they are:

1. If black, green and white teas have the same amount of antioxidants, why is green tea known to be "healthier"? Is there something else that green tea, and perhaps white tea, has that black tea does not?