How to increase shelf life of tigernut milk

Hello, everyone please, can plantain powder be used as food stabilizer or emulsifier in food production?

Unlikely, unless it is heated.
You are better off looking at a gum or modified starch.

That’s a stretch to ask: plantain powder or flour is just another starchy material with enough fiber ( more than 3%)…Its more a thickener due to its 80% starch content…