A Strength potion is a potion that can be made with the herblaw skill. It requires level 12 herblaw to make and gives 50 experience. When consumed, the players Strength level temporarily increases by 10%.
To make a strength potion, first add a tarromin to a vial of water creating an unfinished tarromin potion, then mix in a limpwurt root. As with most potions, you initially make 3 doses of the potion and the doses decrease as you drink them.