Sometimes you simply have no time to search for a Venusian buttercup plant when you need a specific potion RIGHT NOW. Then one substitutes individual ingredients of a recipe with what one can find in one’s surroundings. From scouring soap to motor oil.
The search for ingredients described below becomes unnecessary for as many ingredients as you have levels in this trait; you take whatever you have within reach.
Thus, when brewing, it is not possible to avoid the negative properties.