next time this would be fine to post in the regular supp section (just a heads up) Not sure about the exact shelf life of tudca but everything expires eventually. Good news for you is that more and more brands are putting tudca out within the past couple years. So if it is aegis then you should be fine as expiration is usually 2 or 3 years depending on the supplement. Most supplements are good after their expiration date as well-more and more companies are putting manufactured dates on their products now.
The only tudca product I can currently think of that would for sure be expired would be liver longer by thermolife (they haven't made a new batch in a few years) If it is aegis you can even as antaeus in their company section if you have a lot number. If it is expired and you need more look into CEL and their newly released tudca or premium powders tudca.
Tudca by Premium Powders