Roberta Holt

Dr. Roberta Holt

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Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Journal Article
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YAYousef A-Dashti
Yousef A-Dashti
RHRoberta Holt
Roberta Holt
CKCarl Keen
Carl Keen
RHRobert M. Hackman
Robert M. Hackman
Cardiovascular disease is a leading cause of death globally, presenting an immense public and economic burden. Studies on cardioprotective foods and their bioactive components are needed to address both personal and public health needs. Date fruit is rich in polyphenols, particularly flavonoids, certain micronutrients, and dietary fiber, which can impact vascular health, and have the potential to attenuate vascular disease in humans. Data from in vitro and animal studies report that consumption of date fruit or extracts can modulate select markers of vascular health, particularly plasma lipid levels including triglycerides and cholesterol, indices of oxidative stress and inflammation, but human data is scant. More investigation is needed to better characterize date polyphenols and unique bioactive compounds or fractions, establish safe and effective levels of intake, and delineate underlying mechanisms of action. Implementing scientific rigor in clinical trials and assessment of functional markers of vascular disease, such as flow-mediated dilation and peripheral arterial tonometry, along with gut microbiome profiles would provide useful information with respect to human health. Emerging data supports the notion that intake of date fruit and extracts can be a useful component of a healthy lifestyle for those seeking beneficial effects on vascular health.

1 September 2017 in Journal of Functional Foods
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Journal Article
Closed access
KAKaran Agrawal
Karan Agrawal
EMEleni Melliou
Eleni Melliou
XLXueqi Li
Xueqi Li
TPTheresa L. Pedersen
Theresa L. Pedersen
SWSelina C Wang
Selina C Wang
RHRoberta Holt
Roberta Holt

6 December 2023 in Journal of Agricultural and Food Chemistry
Verified
Journal Article
Open access
RHRoberta Holt
Roberta Holt
JMJohn Munafo
John Munafo
JSJulie Salmen
Julie Salmen
CKCarl Keen
Carl Keen
BMBehroze S. Mistry
Behroze S. Mistry
HSHarold H. Schmitz
Harold H. Schmitz
There is a need for transformational innovation within the existing food system to achieve United Nations Sustainable Development Goal 2 of ending hunger within a sustainable agricultural system by 2030. Mycelium, the vegetative growth form of filamentous fungi, may represent a convergence of several features crucial for the development of food products that are nutritious, desirable, scalable, affordable, and environmentally sustainable. Mycelium has gained interest as technology advances demonstrate its ability to provide scalable biomass for food production delivering good flavor and quality protein, fiber, and essential micronutrients urgently needed to improve public health. We review the potential of mycelium as an environmentally sustainable food to address malnutrition and undernutrition, driven by food insecurity and caloric dense diets with less than optimal macro- and micronutrient density.

9 December 2021 in Nutrients
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Journal Article
Open access
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XLXiang Li
Xiang Li
RHRoberta Holt
Roberta Holt
CKCarl Keen
Carl Keen
LMLawrence S. Morse
Lawrence S. Morse
GYGlenn Yiu
Glenn Yiu
RHRobert M. Hackman
Robert M. Hackman
Age-related macular degeneration (AMD) is the third leading cause of blindness worldwide. Macular pigment optical density (MPOD), a biomarker for AMD, is a non-invasive measure to assess risk. The macula xanthophyll pigments lutein (L) and zeaxanthin (Z) protect against blue light and provide oxidant defense, which can be indexed by MPOD. This study examined the effects of Z-rich goji berry intake on MPOD and skin carotenoids in healthy individuals. A randomized, unmasked, parallel-arm study was conducted with 27 participants, aged 45–65, who consumed either 28 g of goji berries or a supplement containing 6 mg L and 4 mg Z (LZ), five times weekly for 90 days. After 90 days, MPOD was significantly increased in the goji berry group at 0.25 and 1.75 retinal eccentricities (p = 0.029 and p = 0.044, respectively), while no changes were noted in the LZ group. Skin carotenoids were significantly increased in the goji berry group at day 45 (p = 0.025) and day 90 (p = 0.006), but not in the LZ group. Regular intake of goji berries in a healthy middle-aged population increases MPOD may help prevent or delay the development of AMD.

23 February 2010 in Nutrition Journal
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SSSonia F Shenoy
Sonia F Shenoy
WPWalker Sc Poston
Walker Sc Poston
RRRebecca S Reeves
Rebecca S Reeves
AKAlexandra G Kazaks
Alexandra G Kazaks
RHRoberta Holt
Roberta Holt
JFJohn P Foreyt
John P Foreyt
Metabolic syndrome, a constellation of metabolic risk factors for type 2 diabetes and cardiovascular disease, is one of the fastest growing disease entities in the world. Weight loss is thought to be a key to improving all aspects of metabolic syndrome. Research studies have suggested benefits from diets rich in vegetables and fruits in helping individuals reach and achieve healthy weights.

4 November 2020 in Nutrients
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Journal Article
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VFVivien Fam
Vivien Fam
RHRoberta Holt
Roberta Holt
CKCarl Keen
Carl Keen
Raja SivamaniRaja Sivamani
Raja Sivamani
RHRobert M. Hackman
Robert M. Hackman
Mangos are rich in β-carotene and other carotenoids, along with several phenolic acids that may provide oxidant defense and photoprotection to the skin. The objectives of this study are to investigate the effects of Ataulfo mango intake on the development of facial wrinkles and erythema. A randomized two-group parallel-arm study was conducted to assess 16 weeks of either 85 g or 250 g of mango intake in healthy postmenopausal women with Fitzpatrick skin type II or III. Facial photographs were captured at weeks 0, 8, and 16, and wrinkles at the lateral canthi and erythema at the cheeks were quantified. Skin carotenoid values were measured with reflection spectroscopy. Deep wrinkle severity decreased significantly in the 85 g group after 8 (p = 0.007) and 16 (p = 0.03) weeks compared to baseline measures. In contrast, those in the 250 g group showed an increase after 16 weeks in average wrinkle severity (p = 0.049), average wrinkle length (p = 0.007), fine wrinkle severity (p = 0.02), and emerging wrinkle severity (p = 0.02). Erythema in the cheeks increased with 85 g of mango intake (p = 0.04). The intake of 85 g of mangos reduced wrinkles in fair-skinned postmenopausal women, while an intake of 250 g showed the opposite effect. Further studies feeding 85 g of mangos are warranted.