From my understanding, lyph peptides are usually pretty stable for quite awhile. Im sure mfg knew this so they're probably 1 or 2 years old at least.
Good advice from Bill to send off or home test with preg strip. I believe potency degradation is your main worry here.
Personally I would run it in low doses after preg test. Get labs to see what fsh etc is
Im not super experienced here so take my advice this with a grain of salt. I have done quite a bit of research though. All peptides degrade at different rates depending on what they are and how well they are lyophilized (ph, volume, etc)
Hope they work out for you.
Cool find!