Common questions

They overlap, but they aren't identical. Keto keeps carbohydrates very low all the time to stay in ketosis. Carb fasting is broader — it includes cycling carbs up and down and using shorter low-carb windows, which many people find more flexible and sustainable.

It varies. Some people use a daily low-carb window; others cycle across the week. There's no single rule — the right length depends on your goals, your activity level, and how your body responds.

Eating enough protein and doing resistance training help protect muscle while your body shifts toward burning fat. Carb fasting isn’t about eating less of everything — protein and overall nutrition still matter.

For most healthy adults, cutting back on refined carbs is reasonable. But if you're pregnant, managing diabetes, taking medication, or have a history of disordered eating, talk to a qualified healthcare professional before starting.