I've noticed myself that I have great trouble thinking when my temperature is <=97.4 degrees. Even though 98 degrees is itself low, it just feels so much better. It's easy to be social and talkative with temps in the 98's. Otherwise, it's easy to live in a cave. It might be something to explore. One experiment is to take your temp 3 times a day at 3, 6, and 9 hours after you get up. Average each day's temps. After 5 days, look at the averages. If you have a variance of more than 0.2 degrees, you have adrenal weakness. If your averages are also low, you need thyroid support. It might give you an idea of your target organs for therapy.