There are supposed to still be benefits in older pollen but to a much lesser degree. If it is in the form of pollen pellets, it can be milled down with a blender, etc. until it is as fine as flour. Use 1/4 cup to each 2 cups of flour in breads, muffins, panckes, etc. I found this in a health food book that I got some years ago; it was published back in the 70s.
I use lots of local, natural 'pelleted pollen' for the treatment of my asthma and allergies. SO far, it has really been great and I have had better health overall.
Not one cold since I started taking pollen and I have not had the flu either now that I think about it.
You have to build up a tolerance to pollen....take a few grains of the fresh pollen at first! Too much is too potent for most people. The fresh stuff is not dried and should be keep frozen until it is used. It has not had the moisture removed from it and without drying, it might have some spoilage. If you experience any itching in tht throat, then back off on the amount of pollen you ingest and very slowly build up to around 2-4 tablespoons of pollen daily.
It is not that bad really! It just takes some getting used to and some pollens are not as tasty as others are.