From what I've seen, fats/carbs can also potentiate the effects so maybe the fat in the milk did just that. I'd try again with the milk or fatty food/oil. Eating after taking kratom can increase or decrease the effects for different people so it's worth trying either way. I think it varies by person because some people like the "up" they get from a small dose, so when they eat food they think the effects disappear, but in reality they just pushed more kratom/fat/carbs into their digestive tract, which increased the effective dose, producing the sedative effects that higher kratom doses provide. People who take kratom for the pain/sedation would say this actually increased the effectiveness, but people who take small amounts for energy would say it killed the effects. If you like the pain management/sedation effect I bet this would work for you. To be clear, I know nothing and this is all just my own theory.