I had to change the name as people get funny and won't eat them when you tell them the real name. These are Lactation biscuits, wonderful things for helping increase milk supply in breastfeeding Mums. If you aren't a breastfeeding Mum, you won't suddenly grow massive boobs with the ability to feed the starving masses, not even a little bit. Perfectly safe for everyone , even men!
The magic ingredient is brewers yeast, a by product of beer making, an excellent source of B vitamins and protein. It must be BREWERS yeast, not BAKERS yeast. The other one is linseed or flaxseed meal, they are the same thing, and is high in Omega 3. Both these things are available in most supermarkets or healthfood shops. Keep in the fridge or freezer.