So I was at my local Brew and Wine Hobby store today to pick up some supplies and since I am planning on my first all-grain, I asked about yeast nutrient/energizer and both owners looked at me and kind of smiled and said, we have never used it and it. They both said it was not necessary as the yeast would get all it needs from the grains being mashed. So I didn't buy any. But I keep asking myself, what harm would be it be to add a little nutrient/energizer to the pot. Almost like baseball players using performance enhancing drugs... after all, I want that yeast to over perform in that fermentor. What do you all think? Use it or not?
I started using it in the kettle a few years ago for the reason you mention...cheap insurance. I think maybe it helps, but I can't say for sure. I know it doesn't hurt and it's inexpensive to use. In addition, since I've already got it, I add it to starters. I rhink that may have more value even than adding it to the kettle.