Dispensing systems and methods are disclosed that provide controlled advancement of product and provide controlled access to product stored within the system. Embodiments include a product pushing device having a track and a pusher that urges product stored on the track forward. Certain embodiments include mechanisms to limit the forward progression of the pusher along the track, such as a brake mechanism, and certain embodiments include mechanisms to block access to product located on the track. Some embodiments include mechanisms for providing a time delay in between the vending of products.