The prevalence of obesity has increased exponentially all over the world in recent decades, fuelled by rapid global industrialisation which led to widespread affluence. A review by Low et al in this obesity themed issue reported a high prevalence of overweight and obesity in many countries, ranging from 23.2% in Japan to 66.3% in the USA (developed countries), and from 13.4% in Indonesia to 72.5% in Saudi Arabia (developing countries).
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