Providing the supply chain for dietary supplement manufacturing companies plays a significant role in preserving the competitiveness of companies. We are looking at a special, but very important, supply chain that is based on commissioner sales. Continuous monitoring and efficiency enhancement of the inventory system of this type of supply chain is a major challenge for today's logistics professionals. In the processes to be examined, we have to examine a number of parameters, often with random effects, which in most cases require the use of a simulation test method. The dissertation describes the basic concept of a simulation test method that is suitable for defining optimal stocking mechanisms for the products of companies that produce dietary food supplements.