Cornflour

Cornflour has not traded on the Grand Exchange in the last 24 hours. Its official guide price is 136,670 gp (11 Oct 2026).

You can buy 15 Cornflour every 4 hours. The 4 hours start from your first purchase, and only buying counts towards the limit.

High alchemy turns Cornflour into 1 gp. Buying one at 136,670 gp (its guide price, as it has not traded today) and casting with a nature rune at 138 gp costs 136,808 gp. That is a loss of 136,807 gp per cast at its guide price, so it is not worth alching for profit right now.