I used cayenne this past month as a remedy for tachycardia.However, I thought the same thing as you, that my mood was better. I put a little bit in my hot herbal tea such as chamomile or hibiscus.
Whenever I feel a depressive mood coming on I simply pour myself a glass of juice or tea and add about 3 dashes of just regular grocery store bought cayenne pepper, drink up and in seconds I begin to feel much better and relaxed. Works really fast! No need to even stir the cayenne into the drink.
Hi, I started to put a bit of Cayenne pepper, along with some lemon juice into my morning tea, as an immune booster, but, I must say, I have found that I have been in an extremely energetic and jovial mood. I had not noticed this until yesterday, my 3rd day doing this regimen---just thought I would share.