Pure Pregnenolone and its sulfate (pregnenolone sulfate) have been shown to be neuroprotective, enhance learning and memory, increase deep sleep, improve mood, and lower stress. It increases the growth of neurons and helps prevent cell death. Specifically it enhances the survival of newborn neurons, facilitates the formation of new synapses, enhances myelination, and protects neurons against cell toxicity. It does this by raising your body's natural levels of various hormones. Our Pregnenolone capsules are made in the USA and Third Party Tested for Purity/Safety.