So I forget when or where exactly, but in chapter 2 you can get an item called 'coin necklace' and it says that when you use it, you remove a coin and gain +10 HP and that the effect can stack 10 times, but what it doesn't mention in any way, is if that effect is permanent or temporary.

So I've just been holding on to it, not knowing when would be a good time to use it, because no matter how hard I search either in game or out, I can't find any information that will just tell me if the effect is temporary or not.

So if anyone knows the answer and can tell me, I would really appreciate it.

So turns out, I had mistakenly confused this artifact for a consumable item