YS Nutrition productss are designed to be life-long support for good health. Because YS Nutrition products are nothing other than whole food, there are no obvious contraindications to long-term use. Taking increased amounts for short periods of time is also safe, in most cases. In Traditional Chinese Medicine (TCM), medicinal mushrooms are regarded as “tonics.” The Chinese consider tonics to be safe and take them on a regular on-going basis to promote good health and well-being. The purpose of YS Nutrition products are to provide cells and tissues within the bodies of both humans and animals with the nutritional support needed to remain healthy and to allow for more normal body function.