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Story summary
- A study with twelve pairs of identical twins found significant genetic influences on weight gain after consuming an extra 1,000 calories daily for three months.
- Weight increases varied, with some twins gaining nearly 30 pounds while others gained less than 10 pounds.
- Researchers observed that constitutionally thin individuals resist weight gain, particularly from fatty foods, and quickly lose any weight gained after returning to normal eating.
- Understanding the genetic mechanisms behind this resistance may lead to new treatments for underweight and overweight individuals.
- Bella Barnes has gained weight through strength training and intentional eating, and she coaches others on her methods.
