Nervous acid, also known as shark oil acid, is a monounsaturated omega-9 fatty acid that exists in nerve tissue and fish oil. It was first discovered in shark brain and is a component of cerebroside, the main source of in shark brain and shark oil. It is also found in the sphingolipids of white matter in human brain. It is the only dual-action miracle substance that can repair nerve fibers that unblock damaged nerve pathways in the brain and promote nerve cell regeneration.