AdapNation: all things Self-Optimisation!

#83: Crazy LCHF Body Fat Experiment (!) & Healing the UK ~Sam Feltham

Jun 18, 2019
Sam Feltham, Director of the Public Health Collaboration and founder of Smash the Fat, shares his journey from web design to low-carb advocacy. He presents astonishing results from his personal diet experiments, showing that low-carb real food led to minimal weight gain, defying conventional calorie wisdom. Sam discusses the pivotal role of insulin in weight management, the efficacy of low-carb diets for treating obesity and diabetes, and the growing recognition of this approach in UK public health policies.
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ANECDOTE

Controlled Three-Diet Self-Experiment

  • Sam Feltham deliberately overeating three different diets (low-carb real food, low-fat processed, low-fat vegan) in 2013 produced radically different weight and waist outcomes.
  • He gained 1.3kg on low-carb, 7.1kg on low-fat processed, and 4.7kg on low-fat vegan despite similar calorie surpluses.
ANECDOTE

How Diets Felt During Overeating

  • Subjective effects varied: low-carb felt energetic and satiating, low-fat processed caused tiredness, asthma and poor sleep, vegan caused bloating and poor clarity.
  • Sam felt only the low-carb period as decent despite all being calorically excessive.
INSIGHT

Not All Calories Are Equal In Practice

  • Sam emphasizes diet quality often trumps equal-calorie counting: identical calorie surpluses produced different fat gains by diet.
  • He views hormonal responses and macronutrient roles as key modifiers of calorie outcomes.
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