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IF = Intermittent Fasting. https://www.dietdoctor.com/how-to-lose-weight#14 It is a flexible tool you might consider adding if weight loss is stalled.
If you just started low carb, spend some time learning the diet, get fully fat-adapted, stick to your Atkins plan first.
That Balanced Bites podcast linked in #23 is a good IF intro if needed.