High Rewards Dopamine Shots

I had posted this in my NoFap log and I think this is something worth mentioning here too. Maybe someone can field this question; Last night I went to the grocery store to get a few quick things for lunch and dinner for the remainder of the week. I walked by the candy isle and had a huge craving for sweets. I loaded up a bag of jelly beans, jolly ranchers and a box of bottle cap candy. I got home and ate just about all of it.
My concern is that candy probably satisfies some sort of craving and the brain identifies it as a reward. I am wondering if this sort of thing interferes with the rebooting process and balancing of dopamine in the brain. Should I avoid indulging in such high rewards treats for myself?
I'm also concerned that my running habit might interfere with the dopamine balance in my brain. I've heard that running is addictive and that people get "runner's high". Does this high come from dopamine levels in the brain, the endorphins or both. I'm just wondering if running will help or be a impediment in rebooting rebalancing dopamine from PMO.