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I don't think 12 days is nearly enough time to deplete your protein, especially if you have weight to lose.

Fasting/ketosis is protein sparing in and of itself, and if you have extra weight to lose, you have extra skin surrounding that fat which can be recycled.

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its long enough to become potassium deficient which is not a fun trip, but it should be a trip - to the ER for an IV drip.

Yep, a lot of people who are in to fasting will add lite salt to their water to prevent that.

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