The pineal gland uses serotonin to make melatonin. only secretes a single hormone. The primary function is to control our circadian rhythms and sleep cycles. It connects us to the daily and seasonal rhythms of light and dark. This is the gland they also call the seat of the soul giving us much psychedelic experience by connecting us to our ancient reptilian ancestry. The functions of the pineal are perhaps the most mysterious of all the glands. Sun, Ketu and Mars along with 1st house and Aries must be checked