Bison Milk

Milk from female Bison

Bison Milk is a consumable in ARK: Survival Ascended that, according to the ARK Wiki, arrived with Ragnarok Ascended. Female Bison produce it. The in-game description: "Drink it to gain nourishment and extend the effects of consumed meals, or feed to raise Bison and Wyverns!" Our records list it on 4 maps: Lost Colony, Astraeos, Ragnarok and Valguero.

How a Bison produces milk

The wiki explains when it happens: a female Bison makes milk while she is close to an allied Bison that has not reached adulthood. She produces it every hour, or every 15 minutes in Single Player.

Raising and imprinting babies

Bison Milk can be used to raise baby Wyverns and to imprint on them. Babies of other kinds can receive it as well whenever an imprint request asks for it. Each time the milk is given for an imprint, the baby instantly gains 10% maturation on top of its current progress.

Drinking it yourself

Survivors can drink it too. Doing so doubles how long each active status effect lasts, although any single effect can be extended this way only once.

Spoiling and stacking

Each milk weighs 0.1 and spoils after 1800 seconds, or 30 minutes. A stack holds only 1, and the wiki notes that raising that limit through the ItemStackSizeMultiplier option of the INI file does not work.