Strength potion

When drinking a Strength potion your Strength level will be temporarily increased by 10%. The boost will gradually wear out and your strength level will return to its original level. Strength potions are often used when doing PvM by lower level players because they increase your melee max hit. High level players or players doing PvP will prefer to use Super strength potions over strength potions.

Strength potions can be purchased for 17 coins from the Fish Monger Supplies store, located in Barbarian village.
Strength potions can also be made by combining a limpwurt root and a tarromin potion (unf). This requires a Herblore level of 14 and will grant 250 experience.