第二個主要因素是脂肪家族的基因。在人類基因組中，科學家已經確定了147個特定的區域，這些區域會影響成年個體的體重，以及脂肪在個體體內的分佈方式。科學家們將30萬人的基因數據與體重指數(BMI)進行了比較(Malik, Willett, and Hu, 2013, p.21)。通過這樣的實驗，我們發現，在被診斷出的人體基因中，很少有與食慾調節和成年個體未來體重密切相關的。基因的相互作用與環境因素有關，如個人鍛煉的方式、生活的精神和社會條件以及個人飲食的方式等。它只是表明，個人必須對他們增重的傾向產生決定性的影響。科學家們還觀察到，在遺傳物質中大約有49個區域影響著決定脂肪組織發育的新陳代謝過程，以及脂肪容易附著在身體上的區域。那些母親在懷孕期間連續吸煙的孩子長大成人後肥胖的可能性更大。如果嬰兒在早期體重增加過多，他們與成人肥胖相關的風險就會更高。第三個主要因素是不健康的飲食。富含脂肪、鹽和糖的飲食是非常不健康的飲食，會導致個體肥胖。
非傳染性疾病(NCDs)，如2型糖尿病，一些類型的癌症和心血管疾病是身體不活動的結果(Botwinick, 2013)。高死亡率是由於飲食中缺乏蔬菜和水果。水果和蔬菜，如果攝入量低，會導致各種類型的癌症，如冠心病，胃癌和中風等。根據2015年的一項調查，大約有7億人肥胖(Mechanick, Youdim, Jones, Garvey, 2013)。不僅成年人，而且大約有2000萬兒童也受到肥胖問題的影響，這些兒童的年齡都在15歲以下。兒童期肥胖與成年期殘疾和早期死亡高度相關。有肥胖問題的人可能包括高纖維食物，這些食物幾乎沒有脂肪使人保持年輕。富含高纖維的食物很容易消化，身體裡的血糖停留在膝蓋上，讓人一次又一次地感到飢餓。高纖維穀類食品在很大程度上可以預防肥胖(Milagro, Mansego, De Miguel, and Martinez, 2013)。肥胖的問題可以通過減少卡路里的攝入和養成健康的飲食習慣來克服。
The second main factor is genes of fatty family. In the human genome 147 specific regions have been located by the scientists that affect the weight of an individual as an adult and the manner in which the fat will be distributed in the body of an individual. The genetic data of about 300000 individuals was compared with the body mass index (BMI) by the scientists (Malik, Willett, and Hu, 2013, p.21). With such an experiment, it was revealed that the few among the diagnosed genes in human bodies have close association with the regulation of appetite and the future weight of the individuals when they turn into adults. The interaction of genes takes place with the environmental factors such as the ways in which individuals perform their exercises, their living mental and social conditions and the manner in which individuals eat etc. It simply shows that individuals must have decisive effect on the propensity with which they gain weight. It was also observed by the scientists that around 49 areas are there in the genetic material that affects the metabolism process with which the development of the fatty tissues is determined and also the areas where the fat attaches itself easily to the body. The children whose mother at the time of their pregnancy was chain smokers have higher possibility to grow as obese adults. If infants gain excessive weights during their early stages, they have higher risk related to adult obesity.The third main factor is unhealthy diet.The rich diets that have high quantity of fats, salt and sugar content in them are highly unhealthy diets that lead to obesity among individuals.
The non-communicable diseases (NCDs) such as type 2 diabetes, some types of cancer and cardiovascular diseases are the result of physical inactiveness (Botwinick, 2013). A high rate of deaths is due to diets that are poor in contents of vegetables and fruits. Fruits and vegetables, if taken in low quantities, result in various types of cancers such as coronary heart disease, gastrointestinal cancer and strokes etc. According to a survey done in 2015, it was found that approximately 700 million individuals were obese (Mechanick, Youdim, Jones, Garvey, 2013). Not only adults but children around 20 million are also affected with the problem of obesity and these children are below 15 years of age. Obesity since childhood is highly associated with disability in adulthood and death in early stages. The individuals with problem of obesity can include high -fiber foods that have little fat keeping the person young. The foods rich in high fiber are easily digestible and the blood sugar in the body stays at kneels that makes the person hungry again and again. The individuals with high-fiber cereal prevent obesity up to a great extent (Milagro, Mansego, De Miguel, and Martinez, 2013). The problem of obesity can be overcome by reducing the intake of calories and adopting healthy eating habits.