The Slow poison recipe has been replaced with a Lingering Damage Stamina poison recipe. Slow is too unreliable to merit a recipe of its own. The new recipe teaches its ingredient effects automatically on being read, but only for characters who didn't read the Slow poison recipe from previous versions (not a feature, definitely a bug I haven't yet managed to fix).

There was a minor glitch where the first recipe you read wouldn't teach you ingredient effects until you left the menu. That's fixed now.

Recipes now teach you the ingredient effects revealed. I also redid a lot of the recipes so that it's possible to learn many more effects from recipes, none of the recipes have unwanted side effects, and none of them teach ingredients' first effects (i.e. the ones anybody can learn just by eating the ingredient).