Check the listing for details. Native Remedies Epi-Still for Overactive Nervous Systems. Color: See Description, Condition: New, Made in US. Listed at 43.50 USD. Epi-Still-S is a safe and effective, non-addictive, natural herbal supplement. Formulated by our team of experts in natural medicine to support nervous system harmony and healthy brain functioning, Epi-Still-S promotes healthy neurons, neural connections and electrical activity in the brain. Epi-Still-S contains a scientifically chosen selection of herbs known to support nervous system calm and stability during stress-related episodes. The nervous system is a major part of the complex electrochemical process that acts as the body's control and communications center. It is responsible for sending, receiving and processing nerve impulses throughout the body and coordinates muscle activity, thought, learning, memory, speech, the senses and emotion. The nervous system relies on billions of tin.