When rehydrating dry yeast and with Go-Ferm Protect do you still need to add a yeast nutrient to the boil?
I do. I’ve never tested it to see if it makes a difference.
Go-Ferm doesn’t contain any inorganic nitrogen, because it would damage the yeast during rehydration. Most (all?) yeast nutrients you’d add to the boil do. So comparing the two is kind of “apples to oranges.”