Ben Greenfield Life

How Long Does It Take To Get "FAT ADAPTED", Is Insulin Good or Bad, How Many Carbs Do You *Really* Need & More With Dr. Andrew Koutnik.

Ben Greenfield Life with Ben Greenfield 2025-11-20

Summary

Ben Greenfield and Dr. Andrew Koutnik explore fat adaptation timelines, whether insulin is beneficial or harmful, and how many carbs you actually need on a ketogenic or low-carb diet.

Key Points

  • Biohacking strategies discussed
  • Evidence and experience combined
  • Practical implementation tips

Key Moments

How long fat adaptation actually takes and what the research shows

Ben Greenfield and Dr. Andrew Koutnik discuss the timeline for becoming truly fat-adapted, explaining that the metabolic shift takes longer than most people expect and depends on individual metabolic flexibility.

"The rate of infertility is rising."

Is insulin good or bad -- the nuanced answer most people miss

Dr. Koutnik presents a nuanced view of insulin, explaining that it is neither inherently good nor bad but context-dependent, and that continuous glucose monitoring can help individuals understand their personal insulin response.

"The rate of infertility is rising."

How many carbs you really need based on activity level and genetics

The conversation explores optimal carbohydrate intake relative to activity level and genetic factors, challenging both extreme low-carb and high-carb positions with evidence-based personalization strategies.

"The rate of infertility is rising."

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