Kirsty Pourshahidi

Kirsty Pourshahidi
Ulster University · Nutrition Innovation Centre for Food & Health (NICHE)

BSc, PhD, FHEA

About

109
Publications
22,233
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1,664
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Introduction
Kirsty Pourshahidi currently works at the Nutrition Innovation Centre for Food & Health (NICHE), Ulster University.
Additional affiliations
July 2014 - July 2017
Ulster University
Position
  • Research Associate

Publications

Publications (109)
Article
Full-text available
Background This study investigated the cost-effectiveness of vitamin D 3 supplementation in older adults in Ireland, with year-round vitamin D deficiency (serum 25-hydroxyvitamin D concentration <30 nmol/L) (13% of Irish adults), from the perspective of the Health Service Executive. Methods Three age groups were investigated: (1) ≥50 years, (2) ≥6...
Article
Full-text available
Hypovitaminosis D is prevalent worldwide, with many populations failing to achieve the recommended nutrient intake (RNI) for vitamin D (10–20 μg/day). Owing to low vitamin D intakes, limited exposure to ultraviolet-B (UVB) induced dermal synthesis, lack of mandatory fortification and poor uptake in supplement advice, additional food-based strategie...
Preprint
Full-text available
Background: This study investigated the cost-effectiveness of vitamin D3 supplementation in older adults in Ireland, with year-round vitamin D deficiency (serum 25-hydroxyvitamin D concentration <30 nmol/L) (13% of Irish adults), from the perspective of the Health Service Executive (HSE). Methods: Three age groups were investigated: (1) >=50 years,...
Article
Scope Wild strawberries (Fragaria vesca) are richer in (poly)phenols than common commercial strawberry varieties, e.g., Fragaria × ananassa. (Poly)phenols and their microbiota-derived metabolites are hypothesised to exert bioactivity within the human gut mucosa. To address this, the effects of wild strawberries were investigated with respect to the...
Article
Vitamin D deficiency is a global concern, linked to suboptimal musculoskeletal health and immune function, with status inadequacies owing to variations in UV dependent cutaneous synthesis and limited natural dietary sources. Endogenous biofortification, alongside traditional fortification and supplement usage is urgently needed to address this defi...
Article
Full-text available
Purpose To determine the small intestinal concentration of endocannabinoids (ECs), N-acylethanolamines (NAEs) and their precursors N-acylphosphatidylethanolamines (NAPEs) in humans. To identify relationships between those concentrations and habitual diet composition as well as individual inflammatory status. Methods An observational study was perf...
Article
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PurposeStudies on broccoli (Brassica oleracea var. italica) indicate beneficial effects against a range of chronic diseases, commonly attributed to their bioactive phytochemicals. Sulforaphane, the bioactive form of glucoraphanin, is formed by the action of the indigenous enzyme myrosinase. This study explored the role that digestion and cooking pr...
Article
Full-text available
Diets rich in fruit and vegetables are associated with a decreased incidence of colorectal cancer (CRC) due, in part, to the bioactive (poly)phenolic components and their microbiota-mediated metabolites. This study investigated how such compounds, derived from ingested raspberries in the gastrointestinal tract, may exert protective effects by reduc...
Article
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The laser-induced modification of polyimide substrates to yield conductive graphitised tracks sensitive to the solution pH is investigated. The influence of laser output and operating characteristics on the surface morphology and the consequential impact on electrochemical properties have been evaluated. Several sensor formats have been pursued usi...
Article
Cows’ milk is a relatively poor source of vitamin D but figures listed in UK food composition tables may be outdated. Samples of milk were collected for 1-year and vitamin D3 concentrations analysed using HPLC. Milk consumption data were obtained from the National Diet and Nutrition Survey (Years 1–4). A theoretical model applied vitamin D3 fortifi...
Article
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Purpose: To investigate the effect of consuming quinoa biscuits on markers of CVD risk over 4 weeks in free-living older adults. Methods: A randomized-controlled, double-blind crossover trial was conducted in which consenting healthy adults aged 50-75 years (n = 40) consumed 15 g quinoa biscuits (60 g quinoa flour/100 g) or control iso-energetic...
Article
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Objectives Shift work is associated with adverse effects on the health and lifestyle behaviours of employees. This study aimed to examine factors associated with adherence among shift workers to selected indicators of dietary and physical activity guidelines. Methods A cross-sectional study was conducted on 1300 shift workers. Data were collected...
Article
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The endocannabinoid system is a lipid signalling system with several regulatory functions throughout the body including regulation of appetite, food intake, macronutrient metabolism, pain sensation, blood pressure, mood, cognition and immunity. It consists of endocannabinoids (ECs), their receptors and enzymes involved in their synthesis and degrad...
Article
Red meat is an important dietary source of protein and many other essential nutrients including omega(n)-3 polyunsaturated fatty acids (PUFA) which provide numerous benefits to human health. It is well known that grass-fed meat contains a more favourable fatty acid profile, compared to other feeding regimes, but the feasibility of grass finishing i...
Article
Age-related bone loss leads to a significant decline in bone formation and an increase in bone resorption resulting in a marked negative effect on bone mineral density (BMD). This bone turnover cycle can be further disrupted by estrogen deficiency during menopause which can lead to a great net loss of bone in post-menopausal women. Evidence suggest...
Article
Berries are one of the most commonly consumed sources of bioactive polyphenols and these compounds may exert protective effects against initiation of colorectal cancer (CRC) by reducing DNA damage. The inverse correlation between fruit and vegetable consumption and the incidence of CRC is well established, hence the role of berry derived bioactive...
Article
Background: Approximately 17% of the European Union workforce is engaged in shift work. Shift work has been associated with a number of chronic conditions, including obesity and obesity-related metabolic diseases. The aim of this study was to explore the dietary and lifestyle behaviours of shift workers with a healthy vs. overweight/obese body mas...
Article
Full-text available
Broccoli is rich in glucosinolates, which can be converted upon chewing and processing into Aryl hydrocarbon Receptor (AhR) ligands. Activation of AhR plays an important role in overall gut homeostasis but the role of broccoli processing on the generation of AhR ligands is still largely unknown. In this study, the effects of temperature, cooking me...
Article
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Background: University represents a key transition into adulthood for many adolescents but there are associated concerns about health and behaviours. One important aspect relates to diet and there is emerging evidence that university students may consume poor quality diets, with potential implications for body weight and long-term health. This res...
Article
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Background: Epidemiologic evidence suggests that a diet rich in (poly)phenols has beneficial effects on many chronic diseases. Brown seaweed is a rich source of (poly)phenols. Objective: The aim of this study was to investigate the bioavailability and effect of a brown seaweed (Ascophyllum nodosum) (poly)phenol extract on DNA damage, oxidative s...
Article
One in four children on the Island of Ireland are overweight or obese. The consumption of energy-dense, nutrient-poor foods such as snacks, contribute to one fifth of children's calorie intake. However the snack food literature has failed to draw firm conclusions between snack food intake and obesity. Within this literature, the word snack and trea...
Article
Novel quinoa-enriched biscuits improve CVD risk markers in older adults: a randomised crossover trial with a novel food product - Volume 77 Issue OCE3 - L.K. Pourshahidi, E. Caballero, A. Osses, B.W. Hyland, N.G. Ternan, C.I.R. Gill
Article
An investigation into the lifestyle and dietary characteristics of normal weight versus overweight and obese shift workers on the island of Ireland - Volume 77 Issue OCE3 - V. O'Brien, F. Nea, L.K. Pourshahidi, J. Kearney, M.B.E. Livingstone, C.A. Corish
Article
Consumption of high-energy foods in the absence of hunger has been identified as a key target to address in the area of obesity. For children, such foods are often provided by adults as treats. There is limited understating of adults' treat giving. The present study aimed to understand adults' provision of treats to children on the Island of Irelan...
Article
Full-text available
Background Owing to hospitalization, reduced functional capacity and consequently, less sunlight exposure, suboptimal vitamin D status (25-hydroxyvitamin D [25(OH)D]⩽50 nmol/L) is prevalent among COPD patients. Objective This study aimed to investigate seasonal changes in vitamin D status and any associated changes in fat-free mass (FFM), muscle s...
Article
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Context: The metabolism of thyroid hormones, which are essential for normal development, involves many proteins and enzymes. It requires iodine as a key component but is also influenced by several other micronutrients, including selenium, zinc, iron, and vitamin A. Objective: This systematic review was designed to investigate the effect of micro...
Article
Background: Approximately 17% of the European workforce is engaged in shift work. How the experience of shift work impacts on the dietary and lifestyle practices of workers is unclear. Methods: Overall, 15 focus groups were conducted by two researchers, with 109 participants. The initial focus group was carried out with both researchers present,...
Article
Full-text available
Cow's milk is the most important dietary source of iodine in the UK and Ireland, and also contributes to dietary selenium intakes. The aim of this study was to investigate the effect of season, milk fat class (whole; semi-skimmed; skimmed) and pasteurisation on iodine and selenium concentrations in Northern Ireland (NI) milk, and to estimate the co...
Article
Full-text available
Background: Recent evidence has highlighted the prevalence of mild-to-moderate iodine deficiency in women of childbearing age and pregnant women, with important public health ramifications due to the role of iodine, which is required for thyroid hormone production, in neurodevelopment. Cow milk contributes the greatest amount to iodine intakes in...
Poster
Full-text available
The objectives of this study was to analyse iodine and selenium concentrations in NI milk over a full year and to examine the effects of milk fat class, pasteurization and season on concentrations
Article
Objectives: The study aimed to understand lifestyle practices among shift workers, including an exploration of workers' perceptions of their workplace environment (WPE). Methods: Fifteen focus groups (FGs) were conducted by two researchers, with a total of 109 participants. A pilot FG was carried out with both researchers present, to ensure cons...
Article
Full-text available
The effect of cow's milk consumption on cardiometabolic health in women of childbearing age - Volume 76 Issue OCE3 - A.J. Yeates, N. Gilmartin, S.M. O'Kane, L.K. Pourshahidi, M.S. Mulhern, J.J. Strain
Article
Knowledge and awareness of the new SACN vitamin D dietary guidelines - Volume 76 Issue OCE3 - M.S. Mulhern, S. Boyle, H.C. Burgess, N. Byrne, C. McKeown, L.K. Pourshahidi
Article
Full-text available
Purpose: Experimental animal models of myopia demonstrate that higher melatonin (Mel) and lower dopamine (DA) concentrations actively promote axial elongation. This study explored the association between myopia and serum concentrations of DA and Mel in humans. Methods: Morning serum concentrations of DA and Mel were measured by solid phase extra...
Article
Full-text available
Purpose: Vitamin D inadequacy is a global health concern in athletes as well as the general population. Whilst the role of vitamin D in skeletal health is well defined, there remains uncertainty over whether vitamin D supplementation has an added benefit beyond bone health. Methods: This randomised placebo-controlled trial in healthy male and fe...
Article
Vitamin D deficiency is associated with increased bone remodelling activity. Quantification of reference-standard bone turnover markers total procollagen type 1 N-terminal propeptide (P1NP) (bone formation) and beta C-terminal telopeptide of type I collagen (β-CTx) (bone resorption) therefore enable detection of subtle perturbations in bone remodel...
Article
Objective This qualitative study aimed to investigate consumer opinions on the usefulness of portion size estimation aids (PSEA); consumer preferences in terms of format and context for use; and the level of detail of guidance considered necessary for the effective application of PSEA. Design Six focus groups (three to eight participants per group...
Article
Lower cathelicidin concentrations in Irish athletes compared to controls: a role for vitamin D? - Volume 76 Issue OCE3 - J.J. Todd, E.M. McSorley, L.K. Pourshahidi, S.M. Madigan, E. Laird, R.R. Weir, M. Healy, M.B.E. Livingstone, C. Beggan, L. Beggan, P.J. Magee
Article
Coffee consumption and cardiometabolic health in UK adults: cross-sectional analysis of the National Diet and Nutrition Survey - Volume 76 Issue OCE3 - L.K. Pourshahidi, L. Navarini, M. Petracco, J.J. Strain
Article
Full-text available
An exploration of parental barriers to appropriate portion sizes for young children: a qualitative study - Volume 76 Issue OCE3 - L.K. Pourshahidi, M.B.E. Livingstone, L.E. McCotter, T.A. McCaffrey, H. McCarthy, M.A. Kerr
Article
Full-text available
Vitamin D is obtained by cattle from the diet and from skin production via UVB exposure from sunlight. The vitamin D status of the cow impacts the vitamin D content of the milk produced, much like human breast milk, with seasonal variation in the vitamin D content of milk well documented. Factors such as changes in husbandry practices therefore hav...
Article
Full-text available
Adequate I intake is important before conception and during pregnancy for optimal infant neurodevelopment. Recent studies have highlighted the prevalence of I deficiency in the UK and Ireland. It is possible that optimal I intake may be impeded by a poor knowledge of I nutrition. This study aimed to investigate I knowledge among women of childbeari...
Article
Vitamin D is typically supplied in capsule form, both in trials and in clinical practice. However, little is known regarding the efficacy of vitamin D administered via oral sprays – a method that primarily bypasses the gastrointestinal absorption route. This study aimed to compare the efficacy of vitamin D3 liquid capsules and oral spray solution i...
Article
Vitamin D inadequacy [total 25(OH)D <50 nmol/L] is widespread in athletes. The biologically active metabolite, 1,25-dihydroxyvitamin D, may be involved in regulating inflammation although in vitro findings have not been consistently replicated in human intervention trials. This study, conducted at a latitude of 55°N, aimed to assess inflammatory bi...
Article
Full-text available
Vitamin D deficiency is a global health concern that is prevalent in Ireland. The vitamin D status of elite Irish athletes following implementation of a revised supplementation policy in 2010/2011 has not been explored to date. This study aimed to assess the vitamin D status of elite Irish athletes participating in high-profile sports and establish...
Conference Paper
Full-text available
This abstract was awarded the student prize for best oral original communication. Vitamin D deficiency is highly prevalent in the UK and Ireland and is defined as a total 25-hydroxyvitamin D (25[OH]D) concentration below 30 nmol/L with respect to bone health (1). Owing to the UK and Ireland's northerly latitudes (50–58 and 51–55°N respectively) as...
Article
Full-text available
Purpose: Conjunctival ultraviolet autofluorescence (CUVAF) has been used in previous Southern Hemisphere myopia research as a marker for time spent outdoors. The validity of CUVAF as an indicator of time spent outdoors is yet to be explored in the Northern Hemisphere. It is unclear if CUVAF represents damage attributed to UV exposure or dry eye. T...
Article
Full-text available
Findings on both the health benefits and the potentially harmful effects of coffee consumption have been contradictory. However, the general scientific consensus is that moderate, regular coffee drinking by healthy individuals is either essentially benign or mildly beneficial. Results and generalizations are complicated by a number of factors, incl...
Article
Objective: The present study aimed to evaluate the precision, ease of use and likelihood of future use of portion size estimation aids (PSEA). Design: A range of PSEA were used to estimate the serving sizes of a range of commonly eaten foods and rated for ease of use and likelihood of future usage. Setting: For each food, participants selected...
Article
div class="title">A comparison of capsule and oral spray solution as a method of delivering vitamin D 3 and raising vitamin D status: a wintertime randomised, open-label crossover study - Volume 75 Issue OCE3 - J.J. Todd, E.M. McSorley, L.K. Pourshahidi, S.M. Madigan, E Laird, M Healy, P.J. Magee
Article
Full-text available
div class="title">An assessment of the iodine and selenium content of cow&apos;s milk produced in Northern Ireland - Volume 75 Issue OCE3 - S.M. O'Kane, L.K. Pourshahidi, M.S Mulhern, R.R. Weir, S. Hill, J. O'Reilly, D. Kmiotek, C. Deitrich, E.M. Mackle, E. Fitzgerald, J.J. Strain, A.J. Yeates
Article
Full-text available
Traditionally only a small proportion of the workforce was engaged in shift work. Changing economic pressures have resulted in increased engagement in shift work, with approximately 17 % of the workforce in Europe engaged in this work pattern. The present narrative review aimed to summarise the data on the effects of shift work on the diet, lifesty...
Conference Paper
There is growing evidence that vitamin D is involved in numerous processes beyond skeletal health, some of which may be important for athletic performance (Todd et al., 2015, Sports Medicine, 45, 213–229). Observational findings have revealed a positive correlation between 25-hydroxyvitamin D (25[OH]D) concentration and red blood cell parameters in...
Article
Context: Vitamin D insufficiency is common among the adolescent population, and may have implications for health outcomes in later life. Few studies have investigated the role of vitamin D status in muscle function and cardiorespiratory fitness (CRF) during adolescence. Objective: The aim of this study was to investigate the association between...