Serum 207 (3)

“3 doses serum 207 as described in Herbi Flax's diary.”

MembersTradeable (not for Ironmen)High alch 7 gp

Sources from the OSRS Wiki's drop, shop and recipe data (CC BY-NC-SA 3.0), checked 2026-10-09; the verdict and ordering are ours, built from that data. Item sprite © Jagex.

Ironman verdict

Serum 207 (3) is a members item. Other players trade it, but an Ironman cannot use the Grand Exchange or trade, so you get your own. We list 2 recipes for it.

You can make it yourself with 15 Herblore from Tarromin potion (unf) and Ashes. Each one made gives 50 Herblore XP. That is the lowest-level of its 2 recipes.

The material you can buy or make: Tarromin potion (unf), made with 12 Herblore.

It is a material in 1 recipe: Serum 208 (3) (15 Herblore). High Alchemy (55 Magic) turns one into 7 coins. Each cast uses a nature rune, 180 coins from a rune shop, and five fire runes that a fire staff replaces, so an alch loses about 173 coins; only alch it to clear space.

Where to get it, easiest first

1.Make fromTarromin potion (unf) and Ashes · needs 15 Herblore
2.Make fromUnfinished potion and Tarromin · needs 15 Herblore

Our order: buying first, then making it (lowest skill level first), then killing for it (lowest-level monster first), then other sources. Up to three of each; the full lists are below.