What each one does
Wheat and bamboo are both insoluble and hold water mechanically; they differ mainly in declaration, colour and available particle size. Citrus is partly soluble, so it holds water and also contributes viscosity and genuine emulsifying ability, at a higher price.
What decides it
The declaration, the equipment and whether a second function is needed. An injected product is decided by particle size before anything else, because a grade that blocks a needle is not a candidate whatever it does for yield.
Where the obvious answer is wrong
The obvious answer when a fibre underperforms is a higher level. Often the grade is wrong rather than the dose, and a finer grade of the same material at the same level will behave completely differently.
