Scientists, including one of Indian origin, have found that working in night shifts increases risk of developing obesity and diabetes, which may lead to heart diseases, stroke and cancer.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/working-night-shifts-increases-risk-heart-disease-cancer-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heart-diseases
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cancer
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/medical-research
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health