stamina fruit ?

[main mason]

I got a stamina fruit as a reward form the museum. It said it's a quest item, so what can i do with it ?

[arctic swan]

Consuming it gives a permanent stamina increase (42.5)

You can also buy them from black market (& I think very rarely at bens)
Only consume 1 per day if you ever have multiple - the permanent increase effect only happens once in each day