Can I still drink samova tea when the best-before date (MHD) has passed?

Yes, if the tea has been stored correctly. Basically, our tea and herbal specialties have a much longer shelf life than indicated on the label. However, in order to ensure the taste with the full flavor of our specialties, we have defined a best before date of five to eight years (depending on the variety).
https://www.samova.net/en/FAQ/General-questions/Can-I-still-drink-samova-tea-when-the-best-before-date-MHD-has-passed