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Drinks while fasting

Does anyone have any experience with the following drinks - Sparkling waters Zevia soda or tea Propel Are any of these ok to drink while fasting? Sometimes water gets boring and I need something else. I was thinking of trying out propel for a longer fast. The last two times I tried to do a 72 hour fast I was very lightheaded on the third day. Does anyone recommend any other zero calorie electrolyte drinks?

Answer

My understanding is that any type of sweetener can provoke an insulin response. I stick to flavored unsweetened sparkling water (like Bubly or Lacroix) when I get tired of plain water. I don’t think it matters if you’re mainly focused on weight loss.