Indian Journal of Medical Research

REVIEW ARTICLE
Year
: 2019  |  Volume : 149  |  Issue : 6  |  Page : 695--705

Overnutrition: Current scenario & combat strategies


Prashant Mathur1, Rakesh Pillai2,  
1 National Centre for Disease Informatics & Research, Indian Council of Medical Research, Bengaluru, India
2 INCLEN Institute of Global Health, The INCLEN Trust International, New Delhi, India

Correspondence Address:
Dr Prashant Mathur
National Center for Disease Informatics & Research, Indian Council of Medical Research, Bengaluru 562 110, Karnataka
India

Abstract

Large population-based surveys by the Government of India and several other regional studies have reconfirmed the coexisting burden of over- and undernutrition. While time trends from the 2nd, 3rd and 4th rounds of the National Family Health Survey show declining trends in the prevalence of the underweight, it also highlights increasing rates in the overweight/obesity. Dose-response relationships with different micro- and macronutrient consumption with overweight/obesity prevalence have been established. In this context, it was attempted to identify the specific diet pattern and socio-behavioural determinants of overnutrition along with its combat strategies. This review highlights that while the proportion of chronic energy deficiency is decreasing in India, the intake of micronutrients and food groups continues to be below the recommended dietary allowance set by the Indian Council of Medical Research. Distal factors that determine the nutritional imbalance among Indians are presented under (i) household contextual factors, (ii) peer and socio-cultural influencers, and (iii) business and neighbourhood environment. Accumulation of such factors increases the density of obesogenic environment around individuals. Further, the review offers action points at individual, society and policy levels, presented in a 'logframe matrix' for bringing convergence actions across sectors in consultation with programme managers from different ministries/departments.



How to cite this article:
Mathur P, Pillai R. Overnutrition: Current scenario & combat strategies.Indian J Med Res 2019;149:695-705


How to cite this URL:
Mathur P, Pillai R. Overnutrition: Current scenario & combat strategies. Indian J Med Res [serial online] 2019 [cited 2019 Sep 17 ];149:695-705
Available from: http://www.ijmr.org.in/text.asp?2019/149/6/695/265956


Full Text

 Introduction



Overnutrition is a form of malnutrition (imbalanced nutrition) arising from excessive intake of nutrients, leading to accumulation of body fat that impairs health (i.e., overweight/obesity)[1]. The crisis of overnutrition has increasingly been reported from countries where hunger is still endemic, referred to as coexisting double burden of nutritional imbalance[2]. Studies confirmed that the double burden of nutrition does not affect disproportionately on any population sub-group; however, the relative risk varies with economic development, food security, urbanization and living conditions. Among those living in countries undergoing economic transitioning, children are at higher risk of undernutrition while higher rates of overweight/obesity are observed among adults[3].

Since 1972, the National Nutrition Monitoring Bureau (NNMB) in India has been monitoring nutrition transition at households and individual levels in 10 States[4]. So far, baseline (1975-1979) and four rounds of repeated cross-sectional surveys (1988-1990, 1996-1997, 2011-2012 and 2016-2017) have been conducted. Coexisting nutritional problems (both under- and overnutrition) along with associated cardiometabolic risk conditions such as diabetes and hypertension have already been confirmed from these studies[5],[6]. Among children, concurrent with severe maternal malnutrition, the problem of undernutrition starts in much earlier ages in India. This was confirmed in the National Family Health Survey (NFHS, 4th round, 2015-2016)[7], reporting stunting, wasting and underweight prevalence as 38, 21 and 36 per cent, respectively, among children below five years. Concomitantly, overweight and obesity rates among children also increased to 19.3 per cent (cumulative), highlighting coexisting nutritional imbalance[8]. Among adults, around 20 and 23 per cent of men and women were classified as thin while 19 and 21 per cent of men and women as overweight/obese, respectively (NFHS, 4th round)[7]. The prevalence rate ranged between 4.3 and 40.9 per cent in different States. The 4th round of the NNMB (2016-2017) survey also highlighted that one-third of men and half of women in urban areas suffered ill effects of overweight/obesity[9]. In rural areas, around 33 and 36 per cent of men and women were reported as undernourished while 10 and 13 per cent of men and women as overweight/obese, respectively[10]. In short, the 2nd, 3rd and 4th rounds of the NFHS showed decreasing proportion of men and women in normal weight categories (body mass index ≥18 to ≤25 kg/m2)[11]. In about two decades, a two- to three-fold increase in the cumulative prevalence of overweight/obesity was reported from the national population surveys in India[12].

Overnutrition has several implications on cardiometabolic conditions, leading to chronic non-communicable diseases. India stood second in the list of countries affected with type 2 diabetes (from 5.9% in 2000 to 10.4% in 2017) - presently around 72 million people are affected (as per Diabetes Atlas)[12]. In addition, around 3.3 per cent of people (around 24 million) are pre-diabetic[13]. ICMR-INDIAB study conducted in four regions of India highlighted that the ratio of newly diagnosed cases to known diabetes cases were more than 1:1[14]. Concomitantly, hypertension also increased to 29.2 per cent in 2014[15]. Thus, as compared to three decades ago, people of all age groups across all geographic regions in India are at higher risk of such cardiometabolic conditions conditions[16]. Without addressing the issues associated with overnutrition in India, it will be difficult to prevent the rising burden of chronic disease epidemics, especially because overnutrition is the prime reason for fat accumulation in human body. Although reduction in the intake of sugar, salty and fatty foods is recommended widely, there is no clarity on how to achieve this.

Objectives

This narrative review was conceptualized to describe: (i) specific dietary pattern among overnourished individuals in India; (ii) socio-behavioural and environmental determinants of nutrition imbalance; and (iii) combating strategies to contain this epidemic at population level. This was achieved in two steps:

Step 1 - Literature search was done to identify determinants of nutrition imbalance in India with special emphasis on national-level population-based surveys. Search was conducted in PubMed and Google Scholar. Search strategy used MESH terms and key words (dual burden, nutritional balance, overweight, obesity, underweight, malnutrition along with determinants, drivers, proximal factors or enablers) and free-text articles between 2000 and 2018. Retrieved articles were scrutinized to reduce the heterogeneity in methodology. Determinants of overnutrition in India were then listed and narrated in three sub-heads.

Step 2 - Content analysis of policies and programmes was done based on the key determinants identified in step 1 and a desk review was conducted in policy documents, office memorandums, white papers, short communications and websites of the government departments. Schemes, policies and programmes across sectors were identified that could be tweaked to reduce the density of obesogenic environment at a societal level. Around 60 programmes/schemes attached to over 15 national-level policies, across ministries, were listed. Further, a framework was prepared, as per the step 1, for inclusion in the content analysis. Policies and programmes that may influence individual's food and physical activity behaviour were appraised. Identified options were discussed with 17 stakeholders (programme managers) across sectors to identify feasible action points. All responses were recorded verbatim and analyzed using qualitative methods. Themes emerged were grouped into action points at individuals, societies and policies and programme levels. Finally, the themes were organized in a 'log frame' matrix for adaptation.

 Diet pattern specific to overnourished individuals in India (Proximal factors)



Data on macro- and micronutrient intake among overnourished individuals in urban settings in India were available from the 4th round of the NNMB survey (2016-17)[9]. For rural setting, the 3rd round of the NNMB survey has reported a significant dose–response relationship among overweight/obese men and women consuming total fat >32 g/day and protein >57 g/day [Figure 1][17]. Energy consumption >2106 cal/day was significantly higher among overweight/obese men; however, this was not significant among women[17]. Per-capita consumption of milk/milk products, fat/oils and sugar/jaggery and also salty foods was higher among overweight/obese men and women [Figure 2]. The amount of white sugar, trans fat and salt consumed by overweight/obese persons per day was not available. At population level, around 13.2 teaspoons of white sugar were consumed per person/day in India (~55.3 g/day), which was 22 g/day in 2000 - this was confirmed in the 66th round of the National Sample Survey Office (NSSO) report[18]. In addition, a considerable amount of sugar is consumed per person/day in invisible form, partly attributed to relatively lower price of sugar in Indian markets[19]. Around 54 g/day of total fat was consumed per person/day, which was 21.2 g/day in 2000[18]. The mean salt intake was estimated around 10.9 g/day (95% CI: 8.57 to 13.40)[20]. Men consumed higher salt (9.6 to 13.3 g/day) as compared to women (6.6 to 11.3 g/day). Salt intake was not different in rural areas (9.6 to 12.7 g/day) as compared to urban areas (9.7 to 11.9 g/day). However, salt in invisible forms (savory snacks, condiments, etc) were not estimated[20]. Around 333 g/day of refined grains are consumed by Indians[21].{Figure 1}{Figure 2}

Four rounds of the NNMB survey reiterate that while chronic energy deficiency is decreasing, the intake of micronutrients and certain food groups continue to be below the recommended dietary allowance (RDA) set by the Indian Council of Medical Research (ICMR). While the median intake of protein, iron and thiamine has declined over time, the intake of calcium and vitamin C has improved. Over time, the consumption of cereals and millets is gradually decreasing at households while the consumption of vegetables and fruits is increasing slightly[17]. Fast foods, deep fried foods and processed foods are increasingly consumed at Indian households[22],[23]. Concomitantly, per-capita consumption of coarse grains and pulses has decreased: in 2011-2012, per-capita consumption of pulses was around 26 g/day in rural areas and 29.6 g/day in urban areas, which was significantly lesser than the RDA of 40 g/day[24]. The 64th round of the NSSO on household consumer expenditure survey also confirmed such trends. Such population trends in food choices and declining physical activity levels necessitated ICMR to lower the RDA in 2017[25].

 Determinants of nutritional imbalance in India (Distal factors)



Distal factors of nutritional imbalance begin with duration of breastfeeding of infants[26],[27], availability of calorie dense foods at home[28], food and nutrition security, preference to and increased consumption of sweet and fatty/fried foods and salty snacks[29],[30], skipping meals, less physical activity (sedentary lifestyle) and overall stressful environment at home and neighbourhood. All such factors could be grouped under (i) household contextual factors, (ii) peer and socio-cultural influences, and (iii) business and neighbourhood environment.

Household contextual factors

With changes in family structure (nuclear families), time-constrained parents and children, access to disposable money and increased access and affordable ready-to-eat/cook foods and overall demand for convenience/comforts have catalyzed food preferences at household level. Thus, staple foods consumed by Indians now have a higher glycaemic index as compared to what they were consuming three decades ago. Animal-based foods shared in the diet increased exponentially[31]. The demand of high-value food items such as milk, egg and meat products and fruits/vegetables has increased in both urban and rural areas. The use of refined grains (polished rice and wheat) has replaced the whole grains[32]. Refined grains have only endosperms (starch) that elevate plasma glucose (glycaemic index), insulin, triglycerides and fatty acids[33]. Glycaemic load of refined grains exceeds far above the RDA. Refining process leads to the removal of outer bran and germ portions, resulting in the loss of many nutrients. The quantity of foods consumed (portion size) by Indians has also increased[34]. Processed, packaged and deep-fried foods are increasingly consumed at every household across social strata.

Peer influence & socio-cultural environment

Food habits of individuals are closely related to their social structure, urbanization, psychosocial stress[35], increasing affluence (economic wellbeing)[36], social capital and aggressive marketing[37]. Peers in the society/schools influence individual habits at large, specifically food and physical activity habits. For children, there is a societal pressure for academic performance and parental concerns (primarily safety concerns) that seriously affect their physical activities[38]. Overweight/obesity was found to be higher in children studying in English medium schools and in those children with father and/or mother working or involved in business[39]. Dose-response relationship between skipping breakfast (never, sometimes and daily) and overweight/obesity was observed[40]. Complexity increases with less physical activity due to motorized transportation[41], increasing mechanization of day-to-day activities and less time in outdoor activities (<30 min). Decreased duration of sleep (<8.5 h/day) and increased television viewing (>3 h/day) were also found to be associated with obesity[42].

Business & neighbourhood environment

The density of obesogenic environment is increasing at Indian neighbourhoods. Entrepreneurs and market research companies quickly identify and respond to changing household needs and devise products/services that meet convenience/comforts of families at affordable costs[43]. Affordability and consumption pattern, especially among Indian middle-class households, are non-homogenous. Purchasing power of middle-class families has been shifted to women, which has doubled in the past decade. Around 26 per cent of workforce in rural areas and 13.8 per cent in urban areas were women[44]. Media and advertisement agencies bridge consumers and producers through targeted approaches to facilitate large social changes. Television, mobile phones, internet and radio are used as the source of sharing information. Targeted marketing strategies, brand promotion through children and celebrity endorsements promote family-level changes. Studies have linked food advertisements with overnutrition at population level[45]. Reduction in healthy foods was observed with increased television viewing[46],[47]. Peer influence and other driving forces of consumer behaviours will promote large social changes that increase the density of obesogenic environment in neighbourhood. Such a situation could be better understood by looking at market growth trends of selected products that are associated with overnutrition. Now, caloric beverages are easily available at neighbourhoods and have become a significant source of energy consumption at households. Around 13 per cent annual growth rates have been consistently reported since 2009 for canned sugar-sweetened beverages in India[48]. Condiments, bakery products, ready-to-eat/cook foods, frozen foods and other processed foods have also increased at Indian neighbourhoods. Availability and consumption of snacks, ice creams, chocolates, biscuits, probiotics and processed meats have increased. Studies have highlighted that the variety of food products and the packet sizes in neighbourhood promote overeating[49],[50]. The number of food-processing industries has also increased and contributes significantly to the national GDP (Gross Domestic Product)[51]. Further, by 2020 India's food packaging industry is forecasted to become the 3rd largest in the world[52]. Artificial sweeteners/invisible sugar is heavily used in food-processing industries[53]. All such examples could be viewed as ecological indicators for increasing obesogenic environment in rapidly transitioning Indian societies, which needs to be graded and quantified.

 What needs to be done?



The individuals in Indian societies are under the influence of an obesogenic environment while relative risk varies with the density of such environment around the individuals. As the density increases, more and more individuals get susceptible to the adverse effect of overnutrition and cardiometabolic diseases. There is no consensus on which interventions are likely to be effective to reduce the density of obesogenic environment, especially in a rising economy like India. It is important to reduce this public health catastrophe without influencing the human development and economic reforms in India. As most components of obesogenic environment are driven by non-health sectors, it is important to engage different actors of society across sectors (from public and private) to devise strategies without hampering the economic interests of the nation. Therefore, convergence of health with non-health sectors including urban planning, education, agriculture, trade and market, food and nutrition, sports and recreation, and finances is recommended.

Defining and classifying societies (ranking) based on the density of obesogenic environment and population density correlated with the risk of cardiometabolic conditions are the logical first step to be accomplished. Further, concerted efforts must be implemented at policies and programmes, household and societal level, and individual habits, and choices that will contribute to the reduction of density of obesogenic environments are recommended. For this purpose, a 'whole-of-government-whole-of-society' engagement is recommended where the unit of intervention is not individual, but instead the aggregate society (at local self-governance level, district, State or nation). Through a desk review (by research teams at INCLEN Trust International, New Delhi) various opportunities existing within policies and programmes under nine different ministries (and 40 public programmes) were identified and presented to 17 stakeholders from different sectors. Most stakeholders interviewed were programme managers or department heads under different ministries. From stakeholders, responses, key action points were inductively derived that could potentially contribute in the reduction of obesogenic environment in India [Table 1][Table 2][Table 3]. These were grouped under actions at:

Policies and programme level;Household and societal level; andIndividual habits and choices.

{Table 1}{Table 2}{Table 3}

 Emerging model on ‘path to convergence’



Through desk review policies and programmes spanning across nine ministries (health and non-health sectors), and potential opportunities for policy level improvisation have been identified[56]. Feasibility of such interventions was discussed with over 17 stakeholders having hands-on experience in implementing such national programmes in the field. Common themes emerged from the discussions were grouped to design a convergence model in the Indian context. Efforts were to identify potential strategies to bring different actors of existing vertical programmes across sectors without much additional resources. Such themes are presented in a 'logframe' matrix[Figure 3] with activities, implementation plan, outputs and expected effects. This matrix can be used to design a public health programme at local self-government level, district and State or national level. The model requires adaptation to regional contexts and can add more specific inputs.{Figure 3}

 Conclusion



The present review on determinants of double burden of nutrition reiterates that several recent changes in food environment and food culture have detrimental health effects. The NNMB surveys highlighted that overweight/obesity was specifically increased in men and women consuming energy above 1587 cal/day, protein above 41 to 57 g/day and fat above 19 to 32 g/day. Per-capita per day consumption of milk/milk products, fats and oils (including meat and meat products), sugars and jaggery (including condiments, biscuits etc.) and salts/sodium (savory snacks) showed a significant dose-response relationship with overweight/obesity prevalence. This review highlights that several determinants of obesogenic environment in India have linkages with non-health sectors. It is essential to devise mechanisms to grade obesogenic environment that correlates with the prevalence of overweight/obesity in corresponding locations. Finally, a model has been derived inductively based on the available documents and literature to bring convergence across sectors that are presented in a log frame matrix. Various components of a prospective programme to reduce overweight/obesity are listed in this matrix.

Acknowledgment: Authors acknowledge the contributions of all investigators and research staffs involved in the Indian Council of Medical Research Task Force project on childhood obesity in India.

Financial support & sponsorship: Stakeholder interviews were supported by WHO South East Asia Regional Office, New Delhi through 'scoping study for addressing obesity among children and adolescents in India'.

Conflicts of Interest: None.

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