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Timothy Thomas

Timothy Thomas is a Senior Research Fellow in the Foresight and Policy Modeling Unit. His research focuses on the impact of climate change on agricultural productivity. Tim’s work involves developing innovative methods for simulated climate futures and model coordination between climate, crop, water, energy, and economics.

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Nutrition, Diets, and Health

Nadia Koyratty

Research Fellow

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Bio

Dr. Nadia Koyratty is a Research Fellow in IFPRI’s Nutrition, Diets, and Health Unit. Her research examines how food systems, food and water insecurity, climate-related and other shocks, and nutrition interventions shape nutrition, diets, and health in low- and middle-income countries and disaster-affected settings. She brings expertise in epidemiologic study design, mixed methods, scale development and validation, evidence synthesis, and intervention evaluation. Her work connects rigorous measurement and analysis with applied food systems and global health questions, including fruit and vegetable intake, food environments, disaster food security, maternal and child nutrition, and policy-relevant research.

Dr. Koyratty holds a PhD in Epidemiology from the State University of New York at Buffalo, USA; a European Erasmus Mundus MSc in Sustainable Management of Food Quality, with training in human nutrition, organic agriculture, and food systems across France, Italy, Canada, and Switzerland; and a BSc (Hons) in Food Science and Technology from the University of Mauritius.

Languages Spoken: Mauritian Creole, English, French, Italian, Urdu, Arabic, Hindi

Publications

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Publications

Resource thumbnail

Journal Article

Inadequate energy and micronutrient intakes across Filipino population groups: Findings from the 2021 Expanded National Nutrition Survey

2026
Goyena, Eva A; Maniego, Ma Lynell V; Azupogo, Fusta; Angeles-Agdeppa, Imelda; Hess, Sonja Y; Javier, Charina A; Desnacido, Josie P; Misagal, Ma Evette B; Jusay, Mika Abegail Y; Escote, Joelean Zephanie E
…more Koyratty, Nadia; Olney, Deanna K.; Gelli, Aulo
Details

Inadequate energy and micronutrient intakes across Filipino population groups: Findings from the 2021 Expanded National Nutrition Survey

Background Diet-related challenges and food insecurity are experienced by many Filipinos, underscoring the need for evidence-based interventions to improve diet quality and prevent malnutrition. Objectives The study aimed to evaluate the usual energy and nutrient intakes and the probability of inadequate micronutrient intake across different population groups in the Philippines. Methods The 2021 Expanded National Nutrition Survey was a nationally representative survey conducted in the Philippines; it assessed dietary intake using a quantitative 24-h dietary recall, with a repeated recall among 50% of participants on nonconsecutive days. Usual intakes, probability of inadequate intake (PII) for micronutrients, and mean probability of inadequacy (MPI) for 11 micronutrients were estimated using the National Cancer Institute method among children under-5 (U5, n = 4930), school-aged children (SAC; 6–9 y, n = 8116), adolescents (10–19 y, n = 15,394), adults (20–59 y, n = 29,391), elderly (>60 y, n = 9170), nonpregnant/nonlactating women of reproductive age (NPNL-WRA; 15–49 y, n = 15,037), pregnant females (n = 436), and lactating females (n = 1354). Results Mean energy intake ranged from 699 kcal/d in U5 to 1500 kcal/d in adults and was below recommendations across all populations. Carbohydrates contributed 61% of energy in U5 and 73% in adults and lactating females. Protein contributed 12% to 14% and fat 13% to 26% across all groups. High PII (>75%) for calcium, zinc, vitamin C, riboflavin, iron, thiamine, and folate was observed in most groups, except for lower inadequacies in thiamine, folate, vitamin B6, and vitamin B12 among U5 and SAC. MPI increased with age, from 59.5% in U5 to 83.3% in lactating females and was higher among groups from food-insecure households. Conclusions Reported energy intake was below recommendations in most groups. Intake of many micronutrients was inadequate, particularly among NPNL-WRA, pregnant, and lactating women, highlighting the urgent need for targeted interventions to improve dietary quality, micronutrient intake, and food security among vulnerable populations.

Year published

2026

Authors

Goyena, Eva A; Maniego, Ma Lynell V; Azupogo, Fusta; Angeles-Agdeppa, Imelda; Hess, Sonja Y; Javier, Charina A; Desnacido, Josie P; Misagal, Ma Evette B; Jusay, Mika Abegail Y; Escote, Joelean Zephanie E; Koyratty, Nadia; Olney, Deanna K.; Gelli, Aulo

Citation

Goyena, Eva A.; Maniego, Ma Lynell V.; Azupogo, Fusta; Angeles-Agdeppa, Imelda; Hess, Sonja Y.; et al. 2026. Inadequate energy and micronutrient intakes across Filipino population groups: Findings from the 2021 Expanded National Nutrition Survey. Journal of Nutrition 156(10): 101795. https://doi.org/10.1016/j.tjnut.2026.101795

Country/Region

Philippines

Keywords

Asia; South-eastern Asia; Energy Value; Nutrient Intake; Trace Elements; Nutrition; Surveys; Nutrition Assessment; Nutrition Surveys; Diet

Language

English

Access/Licence

Open AccessCC-BY-4.0

Links

https://doi.org/10.1016/j.tjnut.2026.101795 Source record

Record type

Journal Article

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Brief

Agricultural inputs & harvest among fruit producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation

2026Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; Zagré, Rock Romaric; Olney, Deanna K.; Cunningham, Kenda; Kumar, Neha
Details

Agricultural inputs & harvest among fruit producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation

Repeated crises in Sri Lanka – the COVID-19 pandemic, economic crisis, and climate-related disruptions – have strained food systems and narrowed household access to nutritious foods, pushing many toward cheaper and more calorie-dense alternatives. These pressures have compounded an ongoing nutrition transition, in which rising consumption of ultra-processed foods coexists with persistent micronutrient deficiencies and increasing rates of overweight and obesity. Fruit and vegetables (F&V) are key sources of vitamins, minerals, dietary fiber, and phytochemicals, and adequate intake contributes to the reduction of both micronutrient deficiency and diet-related chronic diseases. However, intake of fruit and vegetables (F&V) falls well short of international and national recommendations: mean consumption in rural agricultural communities is approximately 118 (±117) grams of vegetables and 71 (±243) grams of fruit per person per day, against the minimum of 400 grams per person per day according to the World Health Organization (WHO) and Sri Lanka's Food Based Dietary Guidelines (FBDG). What farmers grow, their production practices, how much they harvest, and whether produce enters household consumption or local markets all shape the acceptability and availability of F&V at the household and community levels, making production data a necessary input for understanding and addressing low intake. This brief follows a companion brief on vegetable production and applies the same framing to fruit. The CGIAR Science Program on Better Diets and Nutrition (BDN), previously the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) initiative, integrates supply-side, demand-side, and food environment interventions across the food system. This brief presents baseline findings on fruit production from rural farming households enrolled in the FRESH end-to-end evaluation in Sri Lanka, documenting fruit crops grown, inputs used, pre-harvest losses, yields, and market orientation to inform supply-side intervention design and establish a benchmark for evaluation.

Year published

2026

Authors

Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; Zagré, Rock Romaric; Olney, Deanna K.; Cunningham, Kenda; Kumar, Neha

Citation

Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; et al. 2026. Agricultural inputs & harvest among fruit producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation. CGIAR Research Program on Better Diets and Nutrition Research Brief 3. Washington, DC: International Food Policy Research Institute. https://hdl.handle.net/10568/185510

Country/Region

Sri Lanka

Keywords

Asia; Southern Asia; Agriculture; Farm Inputs; Harvesting; Fruits; Sustainability; Healthy Diets; Rural Areas; Randomized Controlled Trial

Language

English

Access/Licence

Open AccessCC-BY-4.0

Source

Source record

Record type

Brief

Resource thumbnail

Brief

Agricultural inputs and harvest among vegetable producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation

2026Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; Zagré, Rock Romaric; Olney, Deanna K.; Cunningham, Kenda; Kumar, Neha
Details

Agricultural inputs and harvest among vegetable producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation

Sri Lanka's agricultural sector plays a vital role in the food security and nutrition of its people. In recent years, overlapping crises, including the COVID-19 pandemic, severe economic collapse, climate-related shocks, such as cyclone Ditwah and subsequent flooding, and global political unrest have disrupted food systems and exacerbated food insecurity for Sri Lankans. These challenges have constrained access to nutrient-rich foods, while increasing reliance on cheaper, less nutritious alternatives. At the same time, Sri Lanka has been undergoing a nutrition transition characterized by increased consumption of ultra-processed foods and a double burden of malnutrition including micronutrient deficiencies and rising rates of overweight and obesity.

Year published

2026

Authors

Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; Zagré, Rock Romaric; Olney, Deanna K.; Cunningham, Kenda; Kumar, Neha

Citation

Koyratty, Nadia; Aheeyar, Mohamed; Hewajulige, Ilmi G. N.; Tan, Daniel K. Y.; Quabili, Wahid; et al. 2026. Agricultural inputs and harvest among vegetable producers in rural Sri Lanka: Insights from a baseline survey of the Fruit and Vegetables for Sustainable Healthy Diets (FRESH) end-to-end evaluation. Sri Lanka Research Brief 2. Washington, DC: International Food Policy Research Institute. https://hdl.handle.net/10568/183740

Country/Region

Sri Lanka

Keywords

Asia; Southern Asia; Farm Inputs; Harvesting; Vegetables; Rural Areas; Harvesting Losses

Language

English

Access/Licence

Open AccessCC-BY-4.0

Source

Source record

Project

Fruit and Vegetables for Sustainable Healthy Diets

Record type

Brief

Events

IFPRI @ Micronutrient Forum: 7th Global Conference
IFPRI at External Event

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September 28 to October 1, 2026

IFPRI @ Micronutrient Forum: 7th Global Conference

Micronutrient deficiencies are one of the world’s most widespread health crises, impacting one in two children and two in three women globally. Inadequate intake of essential vitamins and minerals can have lasting consequences on survival, health, and well-being that echo across generations and limit economic growth. As climate change and other crises disrupt food systems […]

IFPRI @ NUTRITION 2026 – American Society for Nutrition Annual Meeting
IFPRI at External Event

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July 25 to 28, 2026

IFPRI @ NUTRITION 2026 – American Society for Nutrition Annual Meeting

Poor diets are a leading driver of chronic disease and premature death worldwide, contributing to obesity, diabetes, and other conditions that strain health systems and economies. Rigorous nutrition science is critical to understanding these challenges and informing the policies and interventions needed to achieve healthier diets. NUTRITION 2026, the American Society for Nutrition’s annual meeting, […]

Better Diets & Nutrition Webinar Series Session 2: Demand Creation for Fruits and Vegetables
IFPRI Program/Country Event

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January 28, 2026, 9:00 – 10:30 am

Better Diets & Nutrition Webinar Series Session 2: Demand Creation for Fruits and Vegetables

Healthy diets are essential for promoting well-being and preventing nutrient deficiencies and diet-related diseases. Fruits and vegetables play a critical role by providing essential vitamins, minerals, dietary fiber, and bioactive compounds, while generally having a lower environmental footprint than many other foods. Despite their importance, global fruit and vegetable consumption remains well below the World […]

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