Skyrim BlackSmith potion effects

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If I drink 2 blacksmithing potions will it double the the effect? I have 2 potions that will improve my smithing by 20% for some time. If I drink them both, will it become 40%?

Best Answer

Potions do NOT stack. So no, if you drink them both you won't reach 40% in smithing.

The only potions that stack are the restorative ones.