Xiao Lin paused, asking, "Unstable? Do you mean the potion won't always work?"
"That's not exactly true. It will always work, but how effective it is differs with the person." Fei Yawen had a difficult look on her face, sighing as she shook her head. "Based on our earliest simulations, the potion should be perfect, but once we started clinical trials problems started to pop up. The unreliability of the effects were more than we expected. Some people had very obvious improvements to their training, whereas others barely noticed a difference."
Xiao Lin was a little disappointed, but barely making a difference was still better than having no effect at all. He seemed to think of something before curiously asking, "Could the effects differ with regard to each person's potential?"
Fei Yawen subtly frowned. "That was our initial hypothesis, since the effects it had on individuals with talents were better, but it still remained inconclusive."