Insulin resistance · 7 min read

Atkins Phases Explained — Induction Through Maintenance

Phase 1 through 4 net carb limits, when to advance, and how Atkins compares to strict keto.

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The four phases

  • Phase 1 (Induction): ~20g net carbs — rapid switch to fat burning
  • Phase 2: add 5g net carbs weekly from nuts, seeds, berries
  • Phase 3 (Pre-maintenance): fine-tune as you near goal weight
  • Phase 4 (Maintenance): find your personal carb tolerance

Frequently asked questions

Can I stay on Phase 1 forever?

Some people do for therapeutic reasons under medical care. Most advance to Phase 2 once cravings stabilize and weight loss is on track.

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Getting Started with Keto and Low Carb — First 2 Weeks

A practical starter plan: cut sugar first, target net carbs, prioritize protein, and when to add fasting.

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Metabolic Low Carb Calculator provides educational content only — not medical advice, diagnosis, or treatment. Talk to your healthcare provider before changing diet, fasting, or medications. Read disclaimer