Technical knowledge
A flavour is dosed cold and judged hot.
A flavour is not one substance. It is a population of volatiles, and heat does not remove them evenly. The light, high impact notes go first, so what comes out of the process is not a weaker version of what was approved. It is a heavier, flatter one.
That is why raising the dose does not bring it back. It doubles what survived along with what was already too much.
Read the technical note
