There is an optimal concentration of nutrients like salt, carbohydrate, and fat for enjoyment and reinforcement, which is not 100% pure.

“there is an optimal concentration of these nutrients that is not 100 so you know a great way to illustrate this would be with salt right like eating straight up salt is not something that most people would enjoy like eating spoonfuls of salt it's horrible but at the right concentration it's excellent right it really enhances food and so that's actually generally true about all of these nutrients it's true also about carbohydrate and fat so a term that's been used for that is the bliss point”