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Master of Science / Department of Food, Nutrition, Dietetics and Health / Mark D. Haub / Linda K. Yarrow / Interest and participation in plant-based lifestyle patterns in North America has increased significantly due to perceived health benefits and concerns about the environment, ethics, and safety of the food supply. The Academy of Nutrition and Dietetics suggests that vegetarian diets are healthful, nutritionally adequate. There is growing evidence that plant-based dietary patterns are more sustainable than animal-based diets because they use fewer natural resources and are less environmentally taxing. With the projected world population growth and declining resources, sustainable diets and environmental sustainability are a must. As the need and interest in plant-based dietary patterns increases, it becomes important to evaluate public perception. There is currently little research focusing on attitudes and perceptions of the broader plant-based dietary pattern, particularly in the college-aged population. This exploratory study investigated individual perceptions of meat, dairy foods, and plant-based alternatives. Study results indicated taste preferences for meat and dairy foods were high. Additionally, students in the College of Agriculture and students who had a rural background were more likely to have a positive perception of meat and dairy foods than plant-based foods. These findings suggest the implementation of interventions such as education and the development of plant-based meat and dairy food alternatives matching their flavor profile as closely as possible may best assist in the shift from an animal-based to a plant-based dietary pattern.

Global food production, and consequently consumption, contributes significantly to total greenhouse gas emissions. Hence, there is a need for a shift towards more environmentally friendly consumption patterns. This includes moving away from current levels of dairy consumption, where plant-based alternatives can serve as more environmentally friendly options. This research sheds light on an emerging product category, namely plant-based dairy alternatives, which can serve as options or substitutes for traditional dairy products. The purpose of this thesis is to explore consumer attitudes and purchase intentions towards plant- based dairy alternatives, as well as the factors that influence attitudes and intentions respectively. To achieve an in-depth understanding of the topic, this study is of qualitative nature, using an abductive approach and interpretive philosophy. The primary data is collected through interviews with 16 consumers in the selected target group. Further, this research has developed a modified theory of planned behavior (TPB), to add to current consumer behavior research. The findings of this research show that the majority of the participants have a positive attitude and furthermore intention to purchase plant-based dairy alternatives. Furthermore, several factors influence consumer attitudes, which are subjective norms, health consciousness, taste, knowledge, environmental concern, animal treatment, and appearance. Moreover, purchase intention is affected by two factors, namely price, and curiosity.

Diabetes is a global epidemic that has unfortunately been significantly increasing in number of cases annually. It is currently the 7th leading cause of death in the United States and leads to many further complications including cardiovascular disease, neuropathy, retinopathy, and kidney failure. With the increase in Western dietary patterns there has been a subsequent rise in both obesity and diabetes. In fact, type 2 diabetes makes up 90% of diabetes cases and is, in most cases, preventable with lifestyle changes and weight loss. The aim of this review is to look at the option of a plant-based diet as a means of prevention and treatment for type 2 diabetes. In order to understand type 2 diabetes the basics of pathophysiology, risk factors, statistic, complications and current treatments is discussed. Based on an analysis of a low-fat, plant-based diet compared to current conventional type 2 diabetes treatments there is evidence that a vegan diet increases insulin sensitivity, decreases body weight, lowers cardiovascular risk factors, and decreases need for oral antidiabetic treatments. A review of the efficacy of a plant-based diet for treatment and prevention of type 2 diabetes is also discussed in-depth. Further studies may be helpful to validate adopting a low-fat, plant-based diet in treatment of type 2 diabetes. Overall, it is important for physicians to address the individual needs of their patients and allow for the option of lifestyle changes with adequate guidance and support.

From 2000 to 2019, total volume of fluid milk consumption in the USA has steadily fallen. Many factors have played a role in this trend, including competition with plant-based alternative beverages (PBABs). Comparably, sales of PBABs such as almond “milk” have increased over the same duration. Consumer research has identified key beverage characteristics as purchase drivers for both beverage types. This study sought to evaluate the relative importance of these characteristics, investigate the effect of label statements on ratings of their acceptability, and analyze the settings in which and occasions during which consumption of dairy milk and PBABs occurs. This study consisted of two parts. First, a national survey was distributed to “dual consumers,” those who regularly consume both dairy milk and PBABs. The objectives were to quantify consumer perception of various beverage qualities, evaluate the impact of select label claims and statements on perception of the beverage qualities, and identify when and where dairy milk and PBABs are being consumed. Sensory analysis was also used to determine consumer perception of the various beverage qualities in a consumption experience. We investigated changes of perception during the consumption experience and compared sensory output to corresponding responses from the national survey. Of the on-label messaging explored in this study, “Manufactured without the use of steroids” was the most impactful for increasing positive perceptions of dairy milk, while “Traditionally processed” and “Contains no bioengineered ingredients” negatively affected perceptions. There are many settings outside of the the home and times of the day other than breakfast in which occasional dairy milk and PBAB consumption takes place, indicating available opportunities to market dairy milk and PBABs.

Plant-based diets have recently been gaining popularity due to emerging research that highlights their positive impact on long-term health outcomes. These studies have recently become a topic of interest among the medical community, as plant-based diets have shown to decrease the risk of obesity, stroke, cardiovascular disease, hypertension, and type II diabetes in adults. However, research on plant-based diets is more limited in pregnancy and pediatrics. There are several studies that link predominantly plant-based maternal diets during pregnancy to decreased incidence of various pediatric diseases, including asthma and cancer. While the mechanism is not entirely understood, the theory is that these effects are a result of epigenetic mechanisms known as “metabolic programming”. However, more research is needed to determine whether or not plant-based diets in pregnant women would have the same beneficial epigenetic effects on cardiovascular risk factors in the offspring, given the positive cardiovascular effects they have in adults. The proposed study is a longitudinal study in which researchers will follow female patients through the course of their pregnancy and then through the development of the offspring, in order to define the link between maternal diet during pregnancy and the incidence of childhood obesity and diabetes in the offspring. With the high incidence of obesity in children in the United States, it would be worthwhile to determine whether or not prenatal factors, such as the maternal diet, are contributing to this public health problem.

Plant-based proteins have gained popularity because of their high nutritional value and more sustainable alternative to animal-based proteins. Soybean and chickpea are two widely consumed plant-based proteins, whereas tempeh is a popular plant-based fermented whole food product that is rich in protein. With the increase in the development of plant-based food products, there is little research into how plant proteins affect gut microbiota characteristics and metabolites. Therefore, there is a need to understand the underlying mechanisms surrounding the consumption of these foods. The purpose of this study was to investigate the health benefits of soybean, chickpea, and their tempeh counterparts’ consumption as whole foods on the gut microbiota and metabolites. Our results showed that soybean tempeh significantly increased the abundance of beneficial probiotic bacteria such as Roseburia and Ruminiclostridium 5 in the gut microbiota of mice. Additionally, soybean tempeh and soybean significantly increased Muribaculaeceae abundance, known to increase SCFA production in the colon. Lachnospiraceae NKA136 was significantly increased in soybean tempeh, soybean, and chickpea groups which may allow these foods to be used as a way of probiotic restoration. Our results showed that all dietary supplementation groups had significantly altered metabolic profiles compared to the control group. The soybean tempeh group had higher levels of peroxide (vitamin B6), myoinositol, and tetrahydrobiopterin while the chickpea tempeh group had higher levels of metabolites such as 3 hydroxyanthranilic acid. The soybean group had higher levels of metabolites such as 3-hydroxytryptophan (Oxitriptan) whereas the chickpea protein group had higher levels of metabolites such as 3-hydroxyanthranilic acid and oxitriptan. In conclusion, our study suggests that different plant-based foods can have distinct effects on gut microbiota and metabolic profiles in mice. These findings may have implications for human health and warrant further investigation into the effects of plant protein consumption on human metabolism.

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Yes / The Sustainable Development Goal (SDG) 6.1, established by the United Nations General Assembly in 2015, targets universal and equitable access to safe and affordable drinking water for all by 2030. An essential factor in achieving this goal is the harnessing of “green” coagulants – naturally occurring, environmentally friendly materials which are effective coagulants for use in water treatment, with good availability in developing countries, inherent renewable properties and ease of biodegradation. In order to gain from these benefits, it is essential to fully understand how such coagulants may best be utilised, particularly concerning their practical application in developing countries. In this study, three different plant-based coagulation products (PCPs), namely Hexane (HxKP), saline (StKP) and crude (CrKP) extracts of Kenaf plant seed (Hibiscus cannabinus, a species of the Hibiscus plant), were applied to high (HTW), medium (MTW) and low (LTW) turbidity water in order to determine their performance and coagulation ability. The ability of the three Kenaf coagulant products (KCPs) to remove hydrophobic fractions of natural organic matter (NOM) was measured. The impact of KCPs on the treated water organic matter content (a known disinfection by-product (DBP) precursor) was examined using known surrogates of natural organic matter (NOM) i.e. the dissolved organic carbon (DOC), ultraviolet absorbance at 254 (UV254) and specific ultraviolet absorbance (SUVA254). Results obtained quantify the implications of using these coagulants during the water disinfection process. A parametric study, measuring the effect of different operating parameters, such as untreated water turbidity, pH, dosages, retention time, and KCP storage time, was completed. Turbidity removal performance for HxKP and StKP was very good with > 90% removal recorded for HTW and MTW, respectively, at pH seven within 2 hours retention time. Images obtained from scanning electron microscopy (SEM) analysis revealed a high likelihood of the coagulation mechanism of KCPs to be adsorption-interparticle bridging brought about by their flake-like structures and surfaces charges. Varying pH had no measurable influence on the coagulation performance of the KCPs. Comparing their efficiency with Moringa Oleifera (MO, a previously researched PCP) and alum showed that HxKP had a negligibly different particle removal as MO. StKP turbidity removal performance was below HxKP by 1% for HTW and LTW and 2% for MTW but performed higher than the CrKP by 5% and 7% in HTW and MTW, respectively. The optimum dosage of HxKP and StKP reduced DBP surrogate values, indicating that its precursor is also minimized, although a slight shift from this optimum dosage showed a significant rise in their concentration thus signifying a potential increase in DBPs during disinfection.

The purpose of this qualitative research paper was to explore how companies who offer plant-based meat and dairy substitutes in the Swedish market, can influence flexitarians towards a more plant-based diet. This was based on the conflict between the need to substitute animal products with more plant-based alternatives and the current resistance among consumers to change from traditional eating patterns. A qualitative research approach was adopted, where seven semi-structured interviews were conducted in the empirical data collection process. The sample included six leading brands in the Swedish market, namely Oatly, Oumph!, Sproud, Violife, Fry and ICA, and one industry expert named Mattias from Vegomagasinet. The research identified seven themes where two of them were most significant; the need to direct the communication to flexitarians and the importance of creating a taste and texture that is similar to meat and dairy. The five remaining influential factors concerned collaborations with stakeholders, challenging packaging design, transformative marketing, earned media and premium prices.