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Genetics and Environment: Keys to Weight Loss Success

1/6/2026

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Summary

Story summary

Dr. Giles Yeo of the University of Cambridge says genetics influence weight loss by affecting feeding behavior, with more than 1,000 genes involved.
The melanocortin 4 receptor (MC4R) mutation is linked to obesity in about 0.3% of the UK population.
People with MC4R are, on average, nearly 18 kg heavier by age 18.
Environmental factors contribute, and Yeo urges improving food environments and helping people understand their eating habits.

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Story summary

Dr. Giles Yeo of the University of Cambridge says genetics influence weight loss by affecting feeding behavior, with more than 1,000 genes involved.
The melanocortin 4 receptor (MC4R) mutation is linked to obesity in about 0.3% of the UK population.
People with MC4R are, on average, nearly 18 kg heavier by age 18.
Environmental factors contribute, and Yeo urges improving food environments and helping people understand their eating habits.