Jimmy Chun Yu Louie

Jimmy Chun Yu Louie
The University of Hong Kong | HKU · School of Biological Sciences

BSc, MNutrDiet, PhD, APD, AN

About

205
Publications
47,162
Reads
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3,293
Citations
Citations since 2016
90 Research Items
2593 Citations
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20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
Introduction
Jimmy is a nutrition researcher based in Hong Kong. His doctoral studies deal with aspects of glycaemic index and gestational diabetes but he has a wider interest in nutrition and chronic diseases. Jimmy is experienced in conducting laboratory based studies, short term acute feeding trials, randomized controlled trials, as well as nutritional epidemiological analyses, making him an all-rounded nutrition researcher.
Additional affiliations
January 2014 - December 2015
The University of Sydney
Position
  • Lecturer
March 2012 - January 2014
University of Wollongong
Position
  • Lecturer in Nutrition and Dietetics
April 2007 - March 2012
The University of Sydney
Position
  • Research Assistant
Education
April 2008 - June 2011
The University of Sydney
Field of study
  • Human Nutrition and Dietetics
February 2005 - December 2006
The University of Sydney
Field of study
  • Nutrition and Dietetics
September 2001 - June 2004
The University of Hong Kong
Field of study
  • Food and Nutritional Sciences

Publications

Publications (205)
Article
Full-text available
Background/objectives: The effect of added sugar on health is a topical area of research. However, there is currently no analytical or other method to easily distinguish between added sugars and naturally occurring sugars in foods. This study aimed to develop a systematic methodology to estimate added sugar values on the basis of analytical data a...
Article
Full-text available
Low-glycemic index (low-GI) diets may be less nutritious because of limited food choices. Alternately, high-GI diets could be less healthful because of a higher intake of refined carbohydrate. The objective was to investigate the association between dietary GI, intakes of carbohydrates from high-GI (CHO(high GI)) and low-GI (CHO(low GI)) sources, a...
Article
Full-text available
The prevalence of gestational diabetes mellitus (GDM) is rising. There is little evidence to demonstrate the effectiveness of one dietary therapy over another. We aimed to investigate the effect of a low-glycemic index (LGI) versus a conventional high-fiber diet on pregnancy outcomes, neonatal anthropometry, and maternal metabolic profile in GDM. N...
Article
Full-text available
To describe a standardized method to assign glycemic index (GI) values to food items, obtained from 3 x 24-h recalls among Aboriginal and Torres Strait Islander and non-Indigenous Australian children, which can be adapted for use with simple food composition databases. Four published GI databases were used as the source of GI values. Changes were m...
Article
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The placement of nutrition information on the front of food packages has been proposed as a method of providing simplified and visible nutrition information. This study aimed to determine the most acceptable and effective front-of-pack food labelling system for Australian consumers. Consumers' preferences and ability to compare the healthiness of m...
Article
This study aimed to compare the efficacy of four formulations of plant-based functional foods on the protection against salt-induced endothelial dysfunction. A randomized crossover design was employed. Ten healthy subjects were recruited, and on five separate occasions they received, in random sequence one of the following 5 treatments: 250 mL of p...
Article
Sugar is widely consumed over the world. Although the mainstream view is that high added/free sugar consumption leads to obesity and related metabolic diseases, controversies exist. This narrative review aims to highlight important findings and identify major limitations and gaps in the current body of evidence in relation to the effect of high sug...
Article
Background In parallel with growing consumer interest in reducing sugar intake, manufacturers have increased availability of food and beverage products containing non-nutritive sweeteners (NNS). However, emerging evidence indicates that specific NNS types have differential effects on cardiometabolic health. Objective This study examined overall ch...
Article
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Background: Countries around the world are putting in place sugar reformulation targets for packaged foods to reduce excess sugar consumption. The Australian government released its voluntary sugar reformulation targets for nine food categories in 2020. We estimated the potential impact of these targets on household sugar purchases and examined di...
Article
Due to the coronavirus pandemic, online food purchases have increased. Nutrition labels and ingredients lists are important to assist individuals in making healthy food choices, but their provision is not mandatory for online stores in Hong Kong. This study aimed to investigate the prevalence of missing nutrition labels and ingredients list informa...
Article
Full-text available
There is limited information regarding the free sugar content of pre-packaged foods in Hong Kong. This study aims to assess the free sugar content and identify the most frequently used free sugar ingredients (FSI) in pre-packaged foods in Hong Kong. Data from 18,784 products from the 2019 FoodSwitch Hong Kong database were used in this analysis. In...
Article
Background Dietary guidelines recommend limiting the intake of added sugars. However, despite the public health importance, most countries have not mandated the labeling of added sugar content on packaged foods and beverages, making it difficult for consumers to avoid products with added sugar, and limiting the ability of policymakers to identify p...
Article
Full-text available
Underconsumption of dietary fiber is prevalent worldwide and is associated with multiple adverse health conditions. Despite the importance of fiber, the labeling of fiber content on packaged foods and beverages is voluntary in most countries, making it challenging for consumers and policy makers to monitor fiber consumption. Here, we developed a ma...
Article
Background The Australian Government will soon be releasing a series of sugar reformulation targets for packaged foods. Objective To estimate the amount of added sugar purchased from packaged food and beverages and the relative contribution that food categories and food companies made to these purchases in 2018. The secondary objective was to exam...
Article
Objectives To examine the potential effect on iron intake of 7-8 month-old infants if pre-packaged baby foods (PBFs) were used as the sole source of complementary foods. Design Based on the 7-day recommended feeding plan for 7-8-month-old infants in Hong Kong (moderate iron-fortified rice cereal with home-cooked meals), 24 modelling scenarios were...
Article
Full-text available
This study aims to examine the use of non-nutritive (NNSs) and low-calorie sweeteners (LCSs) in pre-packaged foods in Hong Kong and the differences in the number of NNSs/LCSs used between products from different regions. In a cross-sectional audit, the types of NNSs/LCSs used in 19,915 pre-packaged foods in Hong Kong were examined by searching the...
Conference Paper
Purpose: Cancer has become one of the most prevalent non-communicable diseases worldwide. Recently, the association between plasma levels of trimethylamine-N-oxide (TMAO), an oxidised form of trimethylamine (TMA) produced by intestinal bacteria, and risks of various cancers was demonstrated. This review aims to provide an overview of the current ev...
Article
Cardiovascular disease (CVD) is the leading cause of death worldwide. Studies using the a priori dietary pattern approach have been criticized for the heterogeneity of their scoring methods. This review aimed to evaluate the evidence on the association between a priori dietary patterns and CVD incidence in recent adult population-based studies. Sim...
Article
Full-text available
Background: The evidence regarding the association between added sugar (AS) intake and obesity remains inconsistent. The aim of this study was to investigate the association between changes in the percentage of energy intake from AS (EAS%) and changes in body weight in a cohort study of older Australians during 15 years of follow-up. In addition, a...
Article
This study aimed to compare the effect of consuming decaffeinated coffee at different times around a high glycemic index (GI) meal on postprandial glycemic responses. Ten healthy adults completed this randomized, crossover trial. In each session, overnight-fasted participants consumed the test drink, which was a cup of decaffeinated coffee with low...
Article
Nutrition policies recommend limiting the intake of added sugars. Information about added sugar content is not provided on packaged foods in Brazil, and even total sugar content information is often absent. This study aimed to (i) adapt a systematic methodology for estimating added sugar content in packaged foods when information on total and added...
Article
Full-text available
To examine the association between various carbohydrate quality indicators and nutrient adequacy in Australian adults. Dietary data from adult participants of the 2011–2012 Australian Health Survey (weighted n = 6150) who had completed two 24 h recalls were analyzed. Glycaemic indices (GI) of foods were estimated based on a published method. Quarti...
Article
Previous meta-analyses that found an inverse association between coffee consumption and metabolic syndrome pooled data from cross-sectional and longitudinal studies, which could lead to potentially misleading conclusions. Hence, this work aimed to reassess this association by analyzing data from the 2 types of studies separately and including recen...
Article
Aim: To examine the iron content and fortification status of pre-packaged baby foods in Hong Kong. Methods: Data of 472 pre-packaged baby foods were collected from various distribution points in Hong Kong in July-August 2018. Item descriptors, iron content, ingredients list, country of origin, organic status and iron-related guidelines displayed...
Article
Background: When aiming to develop dietary messaging to achieve reductions in added sugar intakes, it is necessary to identify key food contributors. Food contributors are not expected to remain static over time. Therefore, the present study aimed to compare the total added sugars (AS) intake and related food sources for adult respondents of two A...
Article
Full-text available
Purpose Previous studies in older Australians have reported higher alcohol intake in those with low added sugar intake, yet the relationship between energy in liquid form [alcoholic beverages vs. sugar-sweetened beverages (SSB)] and measures of obesity has not been evaluated. We aimed to assess the association between the energy derived from SSB an...
Article
Misreporting of added sugar intake has been the major criticism of studies linking high added sugar consumption to adverse health outcomes. Despite the advancement in dietary assessment methodologies, the bias introduced by self-reporting can never be completely eliminated. The search for an objective biomarker for total added sugar intake has ther...
Article
Full-text available
Aims: We compared the effect of a low glycemic index (LGI) diet on reducing daylong glycemia with a macronutrient-match high glycemic index (HGI) diet, using customized meal delivery to ensure compliance. Materials and methods: We conducted a single-blinded randomized crossover trial in 14 healthy adults (57% female) with a mean ± SD age of 21.6...
Article
Full-text available
Objective To describe the Na concentration of pre-packaged foods available in Hong Kong. Design The Na concentrations (mg/100 g or mg/100 ml or per serving) of all pre-packaged foods available for sale in major supermarket chains in Hong Kong were obtained from the 2017 Hong Kong FoodSwitch database. Median and interquartile range (IQR) of Na conc...
Article
Non-core food product advertising on free-to-air television in Hong Kong – ERRATUM - Vivien Hui In Cheung, Jimmy Chun Yu Louie
Article
Background: Lower carbohydrate diets have the potential to improve glycemia but may increase ketonemia in women with gestational diabetes (GDM). We hypothesized that modestly lower carbohydrate intake would not increase ketonemia. Objective: To compare blood ketone concentration, risk of ketonemia, and pregnancy outcomes in women with GDM randomly...
Article
Full-text available
Objective To study the extent and nature of free-to-air television advertisements for non-core products (e.g., fast food or soda) directed at children in Hong Kong. Design Television programs from two major Hong Kong free-to-air television channels airing between 06.00 and 24.00 hours from October 2018 to January 2019 were recorded. Eight nonconse...
Article
Full-text available
Objectives To examine the extent and characteristics of food and beverage (F&B) promotion in Hong Kong mass transit railway (MTR) stations in districts with different socioeconomic statuses (SES) and school density. Design All advertisements located in the eight selected MTR stations were recorded by photographs or videos, and classified into F&B...
Article
Literature regarding the health effect of coffee consumption was contradicting, whereby it was found to protect against type 2 diabetes while inducing acute glucose intolerance. Previous studies suggested that adding sugar and milk into coffee may alter the effect of its consumption on glucose metabolism, potentially explaining the contradiction, b...
Article
Objectives This study aimed to test the hypothesis that lifelong ad libitum consumption of a high sucrose (25% kcal, HS) diet induces overeating, increased adiposity, and impaired metabolic health compared to a low sucrose (10% kcal, LS) diet. Methods Twenty male C57BL6 mice were randomized into 2 treatment groups (LS or HS diet throughout life, n...
Article
This study aimed to compare the effects of drinking different types of coffee before a high glycaemic index (GI) meal on postprandial glucose metabolism and to assess the effects of adding milk and sugar into coffee. In this randomised, crossover acute feeding study, apparently healthy adults (n = 21) consumed the test drink followed by a high GI m...
Article
Full-text available
Objective: This study investigated the accuracy of a flash glucose monitoring system (FGMS) in a postprandial setting. Methods: Ten fasted adults without diabetes wore the FGMS sensors then consumed a standard breakfast. Their glucose levels were subsequently recorded for 2 hours, both by the FGMS and by measuring capillary glucose levels using the...
Article
Full-text available
Purpose This study examined the association of free sugar (FS) intake with obesity measures and blood pressure (BP) among a nationally representative sample of Australian adults. Methods Data from adults (weighted n = 5136) who completed 2 × 24-h recalls and had complete data for BP, waist circumference (WC), waist-to-height ratio (WHtR), and body...
Conference Paper
Since lower carbohydrate intake is now acceptable to improve glucose control in people with type 2 diabetes, we assessed whether women with gestational diabetes (GDM) were also aiming to reduce carbohydrate intake. We surveyed a sample of pregnant women with (n = 50) and without GDM (n = 43) attending antenatal clinics at a tertiary hospital, to de...
Conference Paper
Lower carbohydrate diets potentially improve glycemia but may increase ketonemia in women with gestational diabetes (GDM). We conducted a pilot randomised controlled trial (MAMI1) to compare blood ketone levels of women assigned either a modestly lower carbohydrate (MLC, 135 g/day) diet or routine care (RC, 200 g/day). Forty-six women were randomis...
Conference Paper
Elevated ketone concentrations during pregnancy are undesirable and often indicate poor control of gestational diabetes (GDM). We conducted a pilot cross-sectional study at Royal Prince Alfred and Campbelltown Hospitals, Australia, to determine the proportion of women with GDM experiencing ketonuria and ketonemia. Maternal anthropometry, 12-h dieta...
Article
Background and Aims Great discrepancies exist in results from studies examining the association between dietary patterns and cardiovascular disease (CVD) in different populations. The aim of this study is to examine the relationship between the Australian Dietary Guidelines (ADG) 2013, Mediterranean-DASH diet Intervention for Neurodegenerative Dela...
Article
Full-text available
Purposes: This cross-sectional analysis aimed to investigate the association between free sugar intake and micronutrient intake in Australian children and adolescents and to assess the effectiveness of the cut-off of < 10% energy intake from free sugar (%EFS) as recommended by the World Health Organization (WHO). Methods: Dietary data of childre...
Article
The ability of skeletal muscle to switch between lipid and glucose oxidation for ATP production during metabolic stress is pivotal for maintaining systemic energy homeostasis, and dysregulation of this metabolic flexibility is a dominant cause of several metabolic disorders. However, the molecular mechanism that governs fuel selection in muscle is...
Conference Paper
The safety and efficacy of lower carbohydrate diets in managing gestational diabetes (GDM) are unclear. These diets may increase blood ketone concentrations, which are negatively associated with infant brain development. We investigated the risk of ketonaemia and pregnancy outcomes in women with GDM prescribed a modestly lower carbohydrate (MLC) di...
Article
Lactobacillus rhamnosus strain ASCC 1520 with high soy isoflavone transformation ability was used to ferment soymilk and added to the diet of mice. The impact of L. rhamnosus fermentation on soy isoflavone metabolites and intestinal bacterial community, in conjunction with fecal enzyme activity and short‐chain fatty acids (SCFA) excretion was evalu...
Article
Full-text available
Purpose of review: High-sugar intake has been linked to increased risk of diseases but an accurate assessment of added/free sugar intake has always been a challenge in research. This review summarizes the methodologies for assessing added/free sugar intake reported in recent literature. Recent findings: Four different methods for added/free suga...
Conference Paper
Full-text available
Purpose of the study Cardiovascular disease (CVD) is the leading cause of death globally. Popular diets captured the public attention without well-established evidence on their effects on CVD. The aim of this study is to examine the relationships between MIND, Paleolithic and Okinawan diet pattern and CVD respectively. Methods In this secondary an...
Article
Full-text available
This study aims to examine whether there were changes between 1995–2012 in the dietary glycaemic index (dGI) and glycaemic load (dGL) in Australian children (<16 years) according to three national surveys in 1995 (1995NS), 2007 (2007NS), and 2011–2012 (2012NS). Glycaemic index (GI) values of foods were assigned using published methodology. Plausibl...
Article
Full-text available
Purpose: Habitual consumers of different coffee types may vary in socioeconomic status (SES), which is an important determinant of diet quality. Nonetheless, research on diet quality among coffee consumers was scarce. We aimed to compare the diet quality of coffee consumers with different preferences towards coffee type and additive usage. Method...
Article
Full-text available
This cross-sectional analysis aimed to assess the association between free sugar consumption and the BMI z-score of Australian children and adolescents. Data from the 2007 Australian National Children's Nutrition and Physical Activity Survey were analyzed. Structural equation modeling was used to assess the direct association between usual free sug...
Article
Full-text available
Rising rates of gestational diabetes mellitus (GDM) and related complications have prompted calls to identify potentially modifiable risk factors that are associated with gestational diabetes mellitus (GDM). We systematically reviewed the scientific literature for observational studies examining specific dietary and/or physical activity (PA) factor...
Article
Full-text available
PurposeTo examine the eating occasion (EO) where most added sugars (AS) were consumed using a nationally representative dataset. Methods Plausible dietary data from the Australian Health Survey respondents (n = 8202), collected by a multiple-pass 24-h recall, were analyzed. EO was self-reported during the recall. AS content of the foods reported wa...
Article
Background The negative health effect of excessive intake of free sugars has been gaining increasing public awareness. Objective This secondary analysis aimed to evaluate the impact of free-sugar intake on micronutrient dilution, and estimate a threshold level of free-sugar intake at which a decrease in micronutrient intake becomes evident, based...
Article
Full-text available
Food reformulation has been suggested to be one of the strategies to reduce population added sugar (AS) intake. This study aims to investigate the untested assumption that a reduction in AS through reformulation will result in a reduction in population intakes of AS and energy. Plausible dietary data from 4,140 respondents of an Australian national...
Article
Full-text available
Objectives Globally, one-fifth of the world’s children are stunted, however this statistic may be an underestimate as many countries lack comprehensive monitoring of height-for-age. Until a recent national health survey, Negara Brunei Darussalam has lacked the data to offer a comprehensive assessment of height-for-age among children. The aim of thi...
Article
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Background Self-directed learning (SDL) is expected of health science graduates; it is thus a learning outcome in many pre-certification programs. Previous research identified age, gender, discipline and prior education as associated with variations in students’ self-directed learning readiness (SDLR). Studies in other fields also propose personali...
Conference Paper
The prevalence of gestational diabetes mellitus (GDM) is rising across the globe, along with GDM-related complications and higher risk of obesity and type 2 diabetes in offspring. There is an urgent need to establish key modifiable risk factors which reduce the onset of GDM. We systematically reviewed current literature for observational studies th...
Article
Background: Australians have used the glycemic index (GI) since 1995; however, there are no data on changes in carbohydrate quality over time.Objectives: The aim was to compare average dietary GI and glycemic load (GL), and contributing carbohydrate foods, in the 2 most recent national dietary surveys.Design: Dietary data from adult participants of...
Conference Paper
Gestational weight gain (GWG) within the recommended range produces optimal pregnancy outcomes, yet many women exceed the guidelines. Official recommendations to increase energy intake by ∼1000 kJ/day in pregnancy may be excessive. A systematic review and meta‐analysis were performed to determine if greater increments in energy intake from early to...
Article
Full-text available
This study aimed to determine the major food groups contributing to dietary glycaemic load (GL). Plausible food intake data collected using a multiple-pass 24 hour recall from a weighted sample of 6326 adult respondents (52% male) of the 2011–2012 Australian Health Survey dataset (AHS) were analysed. The GI of foods was estimated based on a previou...
Article
Full-text available
We aimed to investigate whether fish and long chain omega-3 polyunsaturated fatty acid (LCn-3 PUFA) consumption changed appreciably during adolescence. We also assessed whether these dietary variables are associated with retinal microvascular signs (possible markers of future cardiovascular disease risk). 633 children had dietary data at ages 12 an...