With the global supply chain in place for decades now, residents of first-world countries have had access to just about everything. Many people live in dry, windy Colorado and eat a gluten-free diet involving lots of nut and rice flours. Lots of people can be vegan and enjoy fresh fruits and vegetables in any major city. You can even live in cold Minnesota and eat a keto diet full of avocados and coconut oil.

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But, what happens when the supply chain breaks? What happens when the cost of fuel to transport food all over the world becomes prohibitive? Here's what to eat when the supply chain breaks. 

What about those who are gluten-free or must adhere to a special diet?