There are definitely some vitamins that are worth supplementing, like Vitamin C, and Vitamin D during the winter months. I supplement Niacin because the amount of Tryptophan it takes to manufacture it in our own bodies is really high. Not a good tradeoff in my opinion...
I used the entire container up, but based on the actual amount of niacin in the yeast, I went ahead and supplemented with powdered Vitamin B3 capsules in their water. I believe that I was adding about 4,000mg per two gallons of water. Niacin and B3 are synonymous. I just use B3 now and skip the...