Elderly people consuming probiotics can have the benefits of promoting nutrient absorption and maintaining intestinal health, but they are only suitable for elderly people with weakened intestinal function. Probiotics can regulate the host mucosa and systemic immune function, regulate the balance of intestinal flora, so as to promote nutrient absorption, maintain intestinal health and other effects. Elderly people consuming probiotics can play a role in promoting the digestion and absorption of nutrients, assisting in improving the body’s immunity, maintaining the balance of intestinal flora structure, and improving the body’s antioxidant level and other benefits. However, it should be noted that not all elderly people need to consume probiotics, and for those with weakened intestinal function, probiotics can be consumed appropriately. Excessive intake and supplementation of probiotics not only fails to produce positive effects on the organism, but also seriously disturbs the intestinal environment, which is not conducive to health. Elderly people who need to consume probiotics should be medicated under the guidance of a doctor and avoid taking them on their own.