Probiotics are living micro-organisims and they require care to keep them healthy.
They have been kept in a refrigerated environment. However they are resilient and can survive temperatures under 50ºC for a few days. This means if you receive your probiotics on a hot day, the quality will not be affected. The most important contributor to product viability is following storage instructions after delivery. There are a few exceptions to this, therefore please read product storage instructions.