Why Do I Put on Weight?(2019)

An integrative nutritionist designs diets for five volunteers who cannot seem to lose weight, along with busting several myths about weight loss.

Why Do I Put on Weight? is a documentary series that explores the science behind weight gain through personalised investigation. Geneticist Giles Yeo and his team work with five overweight volunteers, examining their individual genetic and metabolic profiles before designing custom diets tailored to each person's unique body and brain chemistry. Rather than prescribing a one-size-fits-all approach, the series reveals how different factors—from genetics to psychology—influence eating habits and weight management. Each volunteer follows their personalised plan, offering insight into why conventional diets often fail and how understanding your own biology might lead to lasting results. The show combines rigorous science with real-world transformation, making complex genetic concepts accessible while challenging common assumptions about weight loss.