Is eating random berries worth it?

[SeattlePoliceman]

If a berry is poisonous and I eat it, will I then be able to identify that specific kind of berry as poisonous in the future? Or will it still say unknown for that type of berry?

[Shurenai]

Eat one to three of a berry and wait. If it's poisonous, you'll get nauseous; If it was poisonous write it down somewhere (ingame or out). That specific color of berry, within that specific save, will ALWAYS be poisonous. If you have that weak stomach negative trait, eat less berry- Eating too many, even just two or three, could kill you.

Repeat for all colors of berries. Alternatively, try to find that 'Herbalist' skill book, as reading it will teach you which berries are poisonous and which are not.

Edit: also to note, you can mix poisonous berries into like, salads, to supplement the food without getting the ill effects. EG: 2 poison berries in a salad with three other ingredients shouldn't give you nausea or any ill effects. (Again, if you have weak stomach, be cautious)

[alden.monzon]

Once your foraging skill level is high enough, berries that are poisonous which you have been gathered will be labelled as poisonous.