2023 Biomedical Reports

Consuming a honey-based gel, such as 'Bear Strength honey gel,' led to a notable reduction in diastolic and mean arterial blood pressure, with gender-specific improvements in redox status among healthy adults.

The study included 20 healthy participants (10 men, 10 women) who incorporated 70g of 'Bear Strength honey gel' into their daily diet for 14 days. Physiological parameters (weight, height, BMI, body fat, waist-to-hip ratio, resting heart rate, and blood pressure) and hematological data were evaluated before and after consumption. Redox biomarkers, including Glutathione (GSH), catalase (CAT), total antioxidant capacity (TAC), protein carbonyls (PCARBS), and thiobarbituric reactive substances (TBARS), were measured.

Post-consumption, the honey-based gel showed a significant decrease in diastolic and mean arterial blood pressure, particularly in women. However, no significant changes were observed in other physiological or hematological variables. Notably, GSH levels increased in both genders, TAC increased universally, and TBARS levels decreased in the total group and women. PCARBS levels decreased exclusively in the women's group. These findings highlight the honey-based gel's potential positive impact on blood pressure and redox status, emphasizing gender-specific effects in healthy adults.

Evaluation of the effects of a honey‑based gel on blood redox biomarkers and the physiological profile of healthy adults: A pilot study Patouna A, Sevdalis P, Papanikolaou K, Kourti M, Skaperda Z, Jamurtas A, Kouretas D

2022 Antioxidants

Pomegranate extract consumption improves antioxidant levels, reduces oxidative stress and cardiovascular risk factors including blood pressure and body fat, and increases lean body mass.

In the study, 24 healthy participants were divided into two groups: one consumed a natural standardized pomegranate extract, while the other, a placebo, in a randomized, single-blind placebo-controlled trial. Evaluations were conducted at baseline and post 14 and 28 days of the experiment, with variables including anthropometric measurements, blood pressure, pulse wave speed, body composition, as well as the levels of salivary and urinary cortisol, cortisone, total phenolics, antioxidant capacity, and lipid peroxidation.

The results indicated significant increases in urinary total phenolics excretion and antioxidant capacity after 14 and 28 days of pomegranate extract intake. By day 28, notable decreases were noted in systolic and diastolic blood pressure, pulse wave velocity, body fat and fat mass, and an increase in lean body mass. In terms of glucocorticoid levels, there was a marked decrease in saliva cortisol at day 28 in the morning for the pomegranate extract group, along with a decrease in the cortisol/cortisone ratio following 28 days of pomegranate extract intake at morning, noon, and evening. Reductions were also seen in urine free cortisol levels by day 14. These observations were unique to the pomegranate extract group, with no significant changes noted in the placebo group.

Antioxidant Properties and Beneficial Cardiovascular Effects of a Natural Extract of Pomegranate in Healthy Volunteers: A Randomized Preliminary Single-Blind Controlled Study Al-Dujaili EAS, Casey C, Stockton A

2021 International Journal of Molecular Sciences

Isoflavones found in soybeans can reduce risks of certain cancers and alleviate menopause-related symptoms among women, such as vasomotor syndromes, spinal bone loss, and hypertension.

The study overviewed soybeans' chemical composition and focused mainly on isoflavones. The research examined the processes of soybean preparation that includes cleaning, drying, crushing, and dehulling, and extraction methods to derive various soy products, particularly focusing on isoflavones - daidzein, genistein, and S-equol. Various soy products such as refined soy oil, soy lecithin, free fatty acids, glycerol, and soybean meal were discussed, along with the presence of the minor biological constituents in remaining components.

The study explored the relationship between isoflavone consumption and disease prevention, particularly in relation to heart disease, cancer incidence—of the breast, bladder, and endometrial and colorectal—and menopause-related symptoms. The therapeutic effects of isoflavones were studied in the context of vasomotor syndromes, spinal bone loss, hypertension regulation, depressive symptoms during pregnancy, and in vitro glycemic control. In contrast, it failed to find definitive effects of isoflavones on cognition improvement and urogenital symptoms. The inconsistencies in defining the ingredients, doses, study durations, and outcomes of isoflavone studies proved challenging for the research.

Utilization of Isoflavones in Soybeans for Women with Menopausal Syndrome: An Overview Chen LR, Chen KH

2020 Evidence-Based Complementary and Alternative Medicine

This study showed that the intervention time was concentrated at 4–8 weeks, mainly through Chinese herbal medicine for the prevention and treatment of elderly hypertension and the complications.

We systematically retrieved and summarised clinical studies on traditional Chinese medicine (TCM) for the prevention and treatment of essential hypertension (EH) using the evidence map. We aimed to explore the evidence distribution, identify gaps in evidence, and inform on future research priorities. Clinical studies, systematic reviews, guidelines, and pathway studies related to TCM for the prevention and treatment of EH, published between January 2000 and December 2019, were included from databases CNKI, WanFang Data, VIP, PubMed, Embase, and Web of Science. The distribution of evidence was analysed using text descriptions, tables, and graphs. A total of 9,403 articles were included, including 5,920 randomised controlled studies (RCTs), 16 guidelines, expert consensus and path studies, and 139 systematic reviews (SRs).

A total of 10 high-quality studies were retrieved, where qigong (20 RCTs), zhengan xifeng decoction (6 RCTs), Liuwei Dihuang pill (6 RCTs), and Chinese herbal medicine (24 RCTs) were considered to have evidence of potential positive effects. Xuefu zhuyu decoction (15 RCTs) was considered a positive effect; i.e., we are confident in estimating the research results.

Traditional Chinese Medicine for Essential Hypertension: A Clinical Evidence Map Zhang Y, Wang B, Ju C, Liu L, Zhu Y, Mei J, Liu Y, Xu F

2020 Medicine

Green tea intake can significantly reduce both systolic and diastolic blood pressure.

In this meta-analysis, studies were sourced from the PubMed, Embase, and Cochrane Library databases from their inception to August 2019. The selection criteria focused on randomized placebo-controlled trials, exploring the effects of green tea on blood pressure control. The final selection consisted of twenty-four trials involving 1697 subjects, and the results were pooled using the generic inverse-variance method with random-effects weighting. The quality of the included studies was independently ascertained using the Jadad score, while potential publication bias was evaluated using funnel plots, and the Egger and Begg tests.

The pooled results showed that green tea intake led to notable reductions in both systolic and diastolic blood pressure, though the outcomes revealed significant heterogeneity among the trials. The funnel plots and tests used to investigate the publication bias did not find any substantial evidence to suggest this was an influencing factor in the results.

Effect of green tea supplementation on blood pressure Xu R, Yang K, Ding J, Chen G

2019 International Journal of Hypertension

Acupuncture as an adjunctive therapy has antihypertensive effect.

The mechanism of acupuncture for hypertension is related to RAAS, vascular endothelium, oxidative stress, the neuroendocrine system, and other factors; also, there is cross-talk between multiple systems and multiple targets. In addition, the functional images, genes, metabolism, etc. change with antihypertensive effect. Acupuncture can protect target organs in addition to reducing BP. Overall, based on the mechanism research acupuncture may be an effective intervention for management of hypertension.

The Mechanism of Acupuncture in Treating Essential Hypertension: A Narrative Review Juan Li ,1 Mingsheng Sun ,2 Jing Ye,2 Yuxi Li ,2 Rongjiang Jin ,1 Hui Zheng ,2 and Fanrong Liang 2

2019 Food & Function

Daily consumption of tart cherry juice may enhance cognitive abilities in older adults, likely due to reduction of hypertension, inflammation, and oxidative stress.

In this randomized controlled trial, 37 adults aged between 65 and 80 years with normal cognitive function were assigned to consume two cups of Montmorency tart cherry juice daily for a duration of 12 weeks. Participants' subjective memory and objective cognitive performance were evaluated at the starting point and after the 12-week juice supplementation using a validated memory questionnaire and a standard assortment of tests designed for cognitive assessment. Factors such as daily caloric intake and physical activity levels were also monitored during the study.

After the 12-week intervention, participants who consumed tart cherry juice showed an improvement in their contentment with memory scores, demonstrated decreased scores of movement time, and performed better on a task of paired associates learning when compared to the control group. Notably, the results revealed that the tart cherry juice group demonstrated improvements on measures of visual sustained attention and spatial working memory relative to their own baseline values. These findings suggest that the potential benefits of tart cherry juice to cognitive abilities might be attributed to the juice's antioxidant and anti-inflammatory properties, and its capacity to reduce blood pressure.

Effect of Montmorency tart cherry juice on cognitive performance in older adults: a randomized controlled trial Chai SC, Jerusik J, Davis K, Wright RS, Zhang Z

2019 Journal of Endocrinological Investigation

Synbiotic pomegranate juice daily consumption for 8 weeks enhances metabolic, oxidative, inflammatory, and blood pressure outcomes in females with Polycystic Ovarian Syndrome.

In this double-blind randomised study over 8 weeks, participants were given 300ml/day of either plain pomegranate juice, a synbiotic beverage, a synbiotic pomegranate juice, or a placebo beverage. Biochemical measures such as lipid profile, total antioxidant capacity, malondialdehyde, and high sensitivity C-reactive protein, as well as blood pressure were evaluated at the start and the end of the trial.

Participants who consumed pomegranate juice, the synbiotic beverage or the synbiotic pomegranate juice saw positive changes in their lipid profiles, oxidative stress markers, inflammation indicators and blood pressure levels. Specifically, total cholesterol was lower for those who consumed the synbiotic beverage, while bad cholesterol (LDL-c) was reduced in the synbiotic and synbiotic pomegranate juice groups, and good cholesterol levels (HDL-c) were increased in the plain pomegranate juice and the synbiotic pomegranate juice groups. As for oxidative stress and inflammation, malondialdehyde was lower and total antioxidant capacity was increased in the pomegranate juice and synbiotic pomegranate juice groups. High sensitivity C-reactive protein decreased in the pomegranate juice group. Blood pressure was lower among those who consumed both the synbiotic pomegranate juice and plain pomegranate juice compared to those who had the placebo.

The effect of synbiotics pomegranate juice on cardiovascular risk factors in PCOS patients: a randomized, triple-blinded, controlled trial Esmaeilinezhad Z, Barati-Boldaji R, Brett NR, de Zepetnek JOT, Bellissimo N, Babajafari S, Sohrabi Z

2019 Critical Reviews in Food Science and Nutrition

Cinnamon supplementation leads to a significant reduction in both systolic and diastolic blood pressure in adults.

This systematic review and meta-analysis included studies up to July 2019, sourced from databases like PubMed/Medline, Scopus, ISI Web of Science, Embase, and Google Scholar. The research focused on randomized clinical trials that primarily explored the effect of oral cinnamon supplementation on blood pressure parameters, including systolic or diastolic blood pressure.

From the 469 citations, nine trials involving 641 subjects were included. The results inferred that cinnamon supplementation leads to a noticeable decrease in both systolic and diastolic blood pressure. A more remarkable effect on systolic blood pressure was observed in trials using less or equal to 2g cinnamon, lasting for 12 weeks or more, and included participants under the age of 50. Diastolic blood pressure was also reduced using lower doses of cinnamon. No significant non-linear associations were detected between cinnamon supplementation dosage, study duration, and both systolic and diastolic blood pressure.

Anti-hypertensive effects of cinnamon supplementation in adults: A systematic review and dose-response Meta-analysis of randomized controlled trials Seyed Mohammad Mousavi, Ahmad Jayedi, Yahya Jalilpiran, Maryam Hajishafiee, Azadeh Aminianfar, Ahmad Esmaillzadeh.

2014 Endocrine Abstracts

Pomegranate extract intake, rich in biophenols, lessens salivary cortisol levels, hence potentially improving health-related quality of life, particularly in stress-suffering individuals.

The study was conducted using a double-blind, randomized, placebo-controlled parallel trial. Participants, ranging in age and body mass index, took either a pomegranate extract capsule or a placebo each day for a duration of 4 weeks. The extracted capsule, which contained a high concentration of biophenols, was consumed with water after a meal. In addition to tracking dietary practices and habits, health related Quality of Life was recorded before and after the study. To assess the effects, salivary cortisol and cortisone levels were measured at three distinct points in the day.

In the results, there was a notable decrease in the salivary cortisol levels of participants who consumed these pomegranate extract capsules. Alongside this, the ratio of cortisol to cortisone was significantly minimized. The participants' physical and social functionality, pain levels, and overall well-being showed significant improvement during the study. Conversely, there was a slight increase in the salivary cortisol and ratio of cortisol to cortisone for participants who took the placebo.

Biophenols-rich pomegranate extract intake inhibits salivary cortisol and 11[beta]-HSD1 activity and improves overall quality of life scores in healthy volunteers Stockton A, Al-Dujaili E