Supplements Guide: Side Effects & Best Multivitamins

Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.

3d render medical illustration of the adrenal

Pregnenolone Deficiency Symptoms

Published Jul,08 2011 | By Verneda Lights

The adrenal glands use cholesterol to make pregnenolone, an essential precursor hormone which is then converted into steroid hormones such as estrogen, progesterone, testosterone and cortisol. Highly concentrated in the brain, it functions as an important neurotransmitter.