Glutamine intake may trigger dopamine pathways with very few or no calories.

“I know some people who actually take glutamine and mix it with full fat cream and take it kind of like a shot of full fat cream, which sounds absolutely delicious. By the way, glutamine is a little bit chalky, so it's not that great tasting to ingest with sugar. I should mention if you do try and take this approach of ingesting glutamine to reduce sugar cravings, you want to increase the amount of glutamine that you take somewhat gradually. It can create some gastric distress if you just, you know, I certainly wouldn't take a big tablespoon of it, throw it in water and chug it down three times a day.”