Forgotten brew(4)

Forgotten Brew(4) is a members-only item on the OSRS Grand Exchange in the potions category.

In-game examine text: "4 doses of forgotten brew."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 120 gp, and item ID 27629.

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Forgotten Brew(4) shows an active flip setup with a margin of +775 gp and 107,631 trades over the last 24 hours.

At the buy limit of 2,000 every four hours, max profit per cycle is about 1.55m gp — high margin with healthy liquidity.