The only thing stopping what you add to Vitalin is your Imagination.
Pellets, whole and Powdered, Hemp, Pigeon Conditioner, other Particles, Tuna, other Groundbaits, Bread Crumb, Base Mix, Robin Red, Spices, Gravy Powder, Whole/Crushed/Crumbled Boilies
I regularly add Particles to my Vitalin and the best way I have found is to prepare it the night before you use it, easy even on the Bank if you take a Large Bucket of ready Prepared Particles.
The water of the Particles gets absorbed by the Vitalin, just play around until you get the right amount to do what you want with it.
This mix is soft enough to go in a Spod, or stiff enough to be used as Groundbait and Balled in or Method Fished