Nanocomposite hydrogels that are enforced with carbon-based nanomaterials are mechanically tough and electrically conducive, which make them suitable for use in biomedicine, tissue engineering, drug delivery, biosensing, etc. The electrical conducting property of these hydrogels allow them to mimic the characteristic of nerve, muscle, and cardiac tissues. However, even though these nanocomposite hydrogels demonstrate some functions of human tissue in lab environments, more research is needed to ensure their utility as tissue replacement.