WEIGHT LOSS EXPERT: ''If You’re Counting Calories, You’re Doing It ALL WRONG'' (Do This Instead!)

Summary

Geneticist and nutrition researcher Giles Yeo argues that weight management is more complicated than counting calories. Calories still matter, but the body does not extract the same amount of energy from every food. Processing, cooking, protein, and fiber can affect how much energy becomes available.

Yeo says food quality and overall eating patterns deserve more attention than a calorie number in isolation. Genetics and a person’s environment also influence appetite, weight, and health risks.

Key strategies and takeaways

• Focus on food quality, not just calories. Protein- and fiber-rich foods generally take more work for the body to digest and process than highly refined foods. Processing and cooking can also make more of a food’s energy available.
• Use three nutrition guideposts:
  • Get about 16% of dietary energy from protein.
  • Aim for around 30 grams of fiber per day. Yeo says many people eat about half that amount.
  • Keep free sugars to 5% of energy or less. This includes sugars in juice, honey, and maple syrup.
• Read food labels for protein, fiber, and sugar. A low calorie count, green packaging, or “high protein” marketing does not automatically mean a product is healthy. Consider the whole product and how it fits into your diet.
• Think about your diet over a week rather than fixating on one snack or meal. This leaves room for treats and social occasions while keeping the overall pattern in view.
• Prefer whole or less-processed foods when practical. Eating fruit rather than drinking juice, for example, provides fiber and takes longer to consume. Fresh produce and other foods without labels can also be a useful part of meals.
• Plan for cravings instead of relying on willpower. Notice when, why, and where you tend to eat, then prepare an alternative or strategy for those situations.
• Shape your home environment. Keep tempting foods out of sight or out of the house if their availability makes overeating more likely.
• Move more and preserve muscle, especially with age. Yeo emphasizes maintaining lean mass for health. Exercise can help with weight maintenance, though he describes it as less effective as a stand-alone weight-loss tool.
• Don’t expect to target fat loss in one area. Genetics influence where fat is gained and lost; sit-ups cannot selectively remove belly fat.
• Recognize that weight is influenced by biology and circumstances. Genetics affect appetite, energy use, and fat storage, while access to food, income, culture, and daily routines also shape outcomes. A genetic predisposition can make weight loss harder, but Yeo says it does not make change impossible.
• Understand why weight loss can be difficult to maintain. Yeo says losing weight can increase hunger and lower energy expenditure, making the body push toward regaining weight.
• Treat weight-loss drugs as medical treatments, not cosmetic shortcuts. They may help people who need them, but reduce appetite rather than improve diet quality. Using them without appropriate need or while eating a nutritionally poor diet may lead to excessive weight loss or inadequate nutrition.

Presenters and sources

• Jay Shetty — host of On Purpose.
• Giles Yeo — guest, geneticist and nutrition researcher at the University of Cambridge; author of Why Calories Don’t Count and Gene Eating.
• Wilbur Atwater — historical figure whose work on food energy helped establish commonly used calorie estimates.
• Lulu Hunt Peters — historical figure and early popularizer of calorie counting.
• Peter Attia — mentioned in an interview promoted at the end of the episode.