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Short Summary
Main recommendation: On a low-carb keto diet, prioritize protein as the foundation of the diet and let appetite guide intake rather than calculating grams, since the speakers argue that formulas often lead to overeating or confusion. The protein-sparing effect of keto, combined with exercise, is described as allowing muscle gain or preservation while losing fat.
Key Points
- Dr. Westman says protein comes first in the diet, and that the choice is between running the body on sugar (from carbs and starches) or on fat; carbs raise insulin, which tells the body to store fat rather than burn it.
- Keto is described as protein-sparing: when people eat too little (such as hospital fasting), the body breaks down muscle to make sugar, but adequate protein plus fat fuel avoids this.
- Dr. Westman cites Jeff Volek's research as showing people can gain muscle while losing fat when combining keto with exercise and sufficient protein.
- Standard formulas exist (0.8 g/kg lean body mass as a minimum; 1 to 1.5 g/kg lean mass during weight loss), but Westman says he no longer has patients calculate protein at all.
- Eating one meal a day or intermittent fasting is considered acceptable if not hungry and getting sufficient food, though Westman says there is no peer-reviewed data published yet on one meal a day or carnivore diets.
- Protein powders are acceptable if low in carbs, but should not be the main protein source; Westman notes they can lead to overeating and offer less satiety than whole meat.
Details Worth Noting
- Concrete instructions: Eat real, low-carb foods as the core of the diet: meat, poultry, fish, eggs, some cheese, vegetables and leafy greens. Let hunger guide how much you eat rather than apps or calculators. If hungry between meals, feed the hunger a little rather than forcing fasting. Check protein powders for low carb content before using them. Avoid calculating the weight of food as if it were protein grams; a chicken breast's weight is not its protein content.
- For weight-loss calculations, the cited figure is 1 to 1.5 g protein per kg of lean body mass (not total body weight for people with obesity), and the minimum guideline is 0.8 g/kg lean mass.
- Westman says a body can likely absorb large protein amounts at once, though this has not been well studied under low-carb or fasting conditions; he suspects the body becomes more efficient at protein absorption over time.
- Caution: Westman says people with diabetes should be guided by a professional, and that a person doing high-level athletic performance has different needs. This is his perspective and not professional medical advice.
- Westman notes that most people don't need a gallbladder (i.e., even without one) to do well on a low-carb diet.
Bottom Line
Protein and fat-based whole foods form the base of a low-carb keto approach, and appetite is a better guide than formulas for most people trying to lose weight, though high performance athletes and people with diabetes need individualized guidance.
