system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is nutrition such a tiny part of medical school courses?
gpt
Several reasons, from a US perspective. One, we can only cover so much information in the time available, so priorities have to be made. 

Two, nutritional deficiencies aren't really that much of a problem here. There's a huge industry that tries to convince us we all need to be taking supplements, but that's mostly unnecessary.  

Thirdly, the important stuff that actually matters is covered: the importance of proper diet and exercise, salt intake, the dangers of obesity, vitamin D deficiency, various electrolyte disturbances, etc. These topics aren't all that hard to grasp, so there's no need to spend an inordinate amount of time on it. 

If you go into a specialty that necessitates a focus on the finer points of nutrition, you'll pick up that knowledge in residency and/or utilize a nutritionist in practice.