1. Triple Sterilization. All of Manson PRP tubes are sterilized for three times. It is very safe for human injection. 2. Pyrogen Free. What is pyrogen? Pyrogen is a induced thermal substance that will cause warm-blooded people's temperature to rise abnormally. Why is pyrogen dangerous? The pyrogen has the properties of heat resistance, filterability, water solubility, non volatility and easy to be absorbed. If the Injection contains 1μg / kg pyrogen, it will cause adverse reactions. Fever reaction usually occurs 1 hour after injection. Sometimes, the temperature can rise to 40 or more. The body will have the symptoms of chills, fever, sweating, nausea, vomiting, even coma or prostration. If the patient is not rescued in time, it may endanger his life. This phenomenon is called pyrogenic reaction". All of MANSON PRP tubes are pyrogen free, very safe for human injection. 3. Shelf Life : 2 years. We assure that our PRP tubes have 2-year shelf life.