Revision summary
Lifestyle diseases include cardiovascular disease, type-2 diabetes, obesity, chronic respiratory disease and some cancers. Omran describes epidemiological transition, but India often carries infectious and chronic burdens together. Barker links early-life nutrition to adult risk; Neel’s thrifty-genotype hypothesis is limited. Popkin’s nutrition transition and Singer’s syndemics put behaviour inside social change. Food markets, work, housing and care access constrain “choice”. Prevention requires structural policy, culturally informed care and individual risk reduction together.
Model answer
Introduction
Lifestyle diseases are chronic non-communicable conditions whose risk is shaped by diet, physical activity, tobacco, alcohol, sleep and stress. The phrase is convenient but dangerous: it can convert constrained environments into individual “choices”. Anthropology relocates behaviour inside evolution, culture, class and political economy.
Body
Pattern and mechanisms
Cardiovascular disease, type-2 diabetes, obesity, chronic respiratory disease and several cancers dominate the category. Energy-dense diets, tobacco, sedentary work, air pollution, hypertension and metabolic dysregulation interact with age and genetic susceptibility. Abdel Omran’s epidemiological transition describes the population shift from infectious mortality toward chronic and degenerative disease, but many low- and middle-income populations face both simultaneously.
Evolutionary accounts propose mismatch between earlier environments and rapid urban-industrial change. James Neel’s “thrifty genotype” was influential but is neither a proven single genotype nor an adequate explanation of population differences. David Barker’s developmental-origins hypothesis is better supported: fetal and early-life undernutrition can alter later cardiometabolic risk. Biology therefore carries a life history.
Anthropological critique
- Nutrition transition: Barry Popkin describes shifts toward processed foods, fats and sugars alongside declining activity.
- Ethnographic change: Turkana moving from pastoral settings to towns experienced altered diet, activity and stress; such cases show transition, not a timeless ethnic predisposition.
- Political economy: Cheap ultra-processed food, unsafe walking space, long work hours, advertising and unequal preventive care structure behaviour. Tobacco or diabetes cannot be reduced to willpower.
- Syndemics: Merrill Singer’s concept explains mutually reinforcing disease under inequality—for example diabetes with tuberculosis, depression or food insecurity.
In India, urbanisation and changing work coexist with persistent anaemia, undernutrition and infection. A low-birth-weight child may later encounter caloric abundance: the “double burden” can occur in one household. Tribal and migrant populations may face market displacement from traditional diets without gaining reliable care.
Impact
Chronic disease produces premature mortality, disability, renal and vascular complications, catastrophic household spending and long-term care burdens. Gendered caregiving and late diagnosis magnify effects. Prevention must combine tobacco control, food and urban policy, primary screening and culturally intelligible care—not only advice to exercise.
Flow diagram
flowchart TD B[Early-life biology] --> N[NCD risk] L[Diet activity tobacco stress] --> N P[Markets work class urban form] --> L N --> I[Disability and household cost] X[Policy plus primary care] --> R[Reduced risk and complications]
Conclusion
Lifestyle matters, but lifestyles are socially produced. A critical account joins behaviour to developmental plasticity, commercial food systems, work and inequality. Effective prevention changes environments and care pathways as well as individual habits.
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Are lifestyle diseases entirely preventable?
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Why is the term criticised?
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