The Vitamix, or whatever high speed blender you are using, will break the seeds up so that you can easily digest them.
You may also blend the still good looking leaves and the softer upper part of the stem.
If you will do this for several days in a row you will experience an energy boost.
The nettle seeds will tonify the entire body, but especially your kidney energy.
Nettles are maybe the best blood-building herb.
In spring they are one of the best blood-purifiers.
How will you notice that this has an effect?
In TCM (Traditional Chinese Medicine) the kidneys control the sexual energy and this is how you will notice, aside from having more energy, that this has a very tonifying effect.