How to Start the Keto Diet Correctly: Step-by-Step Guide

Healthy keto meal with avocado, eggs, and greens for beginners
Monitoring macros and progress during keto


Starting the ketogenic diet can feel overwhelming, especially for women over 40 who have unique nutritional needs. This step-by-step guide will help you begin keto safely, avoid common mistakes, and set yourself up for sustainable weight loss.

For a complete breakdown of ratios and macros tailored for women over 40, check out our pillar post: Keto for Women Over 40: Ratios, Macros & the Complete Nutrition Guide.

Step 1: Understand Your Why

Before jumping into keto, identify your personal goal: weight loss, better blood sugar control, or increased energy. Having a clear “why” keeps you motivated.

Pro Tip: Write down your goal and keep it visible in your kitchen or meal planner.

Step 2: Learn the Keto Basics

Keto is a low-carb, high-fat diet. Your body shifts from using glucose for energy to burning fat in a state called ketosis. Key macronutrient ranges for women over 40:

  • Fat: 70–75% of daily calories

  • Protein: 20–25%

  • Carbohydrates: 5–10%

For detailed macro calculations and sample meal plans, see Keto for Women Over 40.

Step 3: Clean Out the Pantry

Remove or limit high-carb foods like:

  • Sugary drinks and snacks

  • Grains, rice, pasta, bread

  • Starchy vegetables and most fruits

Stock up on keto-friendly staples:

  • Fatty fish (salmon, mackerel)

  • Low-carb vegetables (spinach, broccoli, zucchini)

  • Healthy fats (avocados, olive oil, nuts)

Step 4: Start Tracking Your Macros

Use an app or journal to log carbs, fats, and proteins. Tracking helps ensure you reach ketosis faster and maintain consistency.

Mini Tip: Focus first on carb limits; fat and protein can be adjusted over time.

Step 5: Plan Your Meals Ahead

Batch cooking and meal prep saves time and prevents slip-ups. For example:

  • Breakfast: Scrambled eggs with avocado

  • Lunch: Grilled chicken salad with olive oil dressing

  • Dinner: Salmon with roasted cauliflower

Download free keto-friendly recipes here: Keto Recipe Guide.

Step 6: Stay Hydrated & Balance Electrolytes

Keto can lead to water and electrolyte loss. Combat this by:

  • Drinking at least 2 liters of water per day

  • Adding sodium, potassium, and magnesium-rich foods

Step 7: Monitor Your Progress

Check for signs of ketosis: increased energy, reduced appetite, and mental clarity. Consider using ketones.

For women over 40, see our Complete Nutrition Guide to adjust macros for optimal results.

Common Pitfalls to Avoid

  • Going too low on protein: Can cause muscle loss

  • Ignoring electrolytes: Leads to keto flu

  • Expecting immediate results: Weight loss may take 1–2 weeks to kick in

Conclusion

Starting keto doesn’t have to be complicated. By following these steps and tracking your macros carefully, you can achieve sustainable weight loss, increase energy, and improve overall health.

Next Step: Learn how to avoid the most common keto mistakes in our guide: The 5 Most Common Keto Mistakes to Avoid (Especially for Women Over 40).


⚠️ Disclaimer: This article is for informational purposes only and is not medical advice. Always consult a healthcare professional before making major dietary changes.