Because of the serious consequences of osteoporosis, the prevention of this disease, which is also known as “the Silent Epidemic”, is considered essential to the maintenance of human health. It is crucial to maximize bone mass and strength during childhood and adolescence to reduce the risk of osteoporosis in later periods of life. The optimization of nutrition is one of the most important factors. Special attention should be paid to ensuring sufficient calcium intake, which is a problem in several population groups, and its bioavailability. We assessed the effect of fructans, taking into consideration their source (Jerusalem artichoke, yacon, commercial preparation) and the form of their addition to the diet (alone or as an ingredient of strawberry sorbet). A growing-female-rat model was used to assess the potential functional properties of these non-digestible carbohydrates in/without the “fruit matrix”, during calcium hypoalimentation. We showed that fructans have a protective effect during the inadequate supply of Ca, but their action is related to their source as well as the dietary matrix. It is important to look for new preventive strategies, and our paper gives an insight into various fructan sources, depicting their action and how these natural dietary components can be exploited.