Temperature-related degradation of Pectinex during shipping?

Hello.

I would like to buy some pectinex ultra sp-l.

However I am worried about the temperature during the shipping time.

I read that the storage temperature should be between 2 and 8 C. It works best from 15 to 50 C, and if it stays a lot of time in 25 C, it will gradually be deactivated.

It needs a week to come here (Greece), then will it affect its abilities?

Do you know if I can find a document somewhere that explains the gradual loss of power as a function of time and temperature?

Did you have any experience with pectinex not working well due to bad storage?

Thanks.