[central_va]

Cooking oil, rice, beans, is a cheap way to have enough food for years.

You mean the quickest way to weighing 300+ pounds.

[Ancesthntr]

“ You mean the quickest way to weighing 300+ pounds.”
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Only if you assume that you’re going to be sitting on the couch watching TV during the apocalypse. However, it is at least as likely that you will be frantically trying to garden your yard, including clearing away trees to make more space to grow food. That is, if you have had the foresight to get a lot of seeds (heirloom much preferred) - In which case, you will have prepared with more than just rice beans and oil, you will also have a lot of meat and will have done some of your gardening prep before hand.