This thesis studies the potential of dynamic selling strategies in inventory systems with perishable products. We consider a multiproduct Newsvendor problem in which a seller offers a finite inventory of substitutable products over a fixed selling horizon without the possibility of replenishment. Any inventory that remains unsold at the end of the horizon is worthless and therefore wasted. The Newsvendor problem is inherently prone to waste due to demand uncertainty, as realized demand may fall short of the initial inventory. In addition, demand uncertainty often makes it optimal to hold safety stock, that is, inventory levels exceeding expected demand in order to hedge against stockouts, which further increases the risk of waste. In this thesis, we investigate how, and to what extent, different dynamic selling strategies enhance this dynamic alignment between supply and demand, and how this impacts waste, and other performance measures.