To Determine Whether Adding Polyphenol-rich Pulses to Daily Diet Improves Skin Health by Reshaping the Skin Microbiome and Lipids, and Reducing Oxidative Stress and Inflammation in Women
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 50
- 试验地点
- 2
- 主要终点
- Skin sensitivity after UV radiation
研究概览
简要总结
Skin health is influenced by the microbiome, lipids, oxidative stress, inflammation, and UV exposure. A 12-week trial with 48 women aged 45-65 will test if polyphenol-rich pulses improve skin health by affecting these factors. Using a white rice control diet, the study will measure skin parameters and analyze correlations with changes in lipids and microbiome, potentially proving the benefits of pulses.
详细描述
Human skin is the largest organ in the body. The slow deterioration of skin appearance and its barrier function are the most prominent signs of human ageing. Cutaneous factors (microbiome and lipids) have immediate and direct impacts on skin health and functions. Intrinsic factors (oxidative stress and inflammation) and extrinsic ones (mostly UV irritation due to sun exposure) affect the skin chronically. Our preliminary research showed that six weeks of cranberry juice intake improved part of women's skin health parameters and decreased oxidative stress. Its activities on the skin correlated with changes in skin microbiome and epidermal lipids. Pulses, especially lentils and beans, are rich sources of polyphenols and fibers. However, there is no clinical evidence on whether adding a serving of cooked mixed pulses with high polyphenol content (lentils, red kidney bean, black beans, and pinto beans) to the diet affects skin health and the underlying causes of skin aging. Women make over 90% of the decisions on food purchases for their families. Skin health is a major concern for women because skin aging becomes visibly noticeable after age 30. The investigators hypothesize that polyphenol-rich pulses improve skin health by reshaping the cutaneous microbiome and lipids and suppressing inflammation and oxidative stress. This hypothesis will be tested in a 12-week clinical trial in 50 women aged 45-65 using a randomized controlled parallel design. The control diet will be formulated using white rice to match the calories and macronutrients of mixed pulses.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None (Participant, Investigator)
入排标准
- 年龄范围
- 45 Years 至 65 Years（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •BMI (18.5-29.9)
- •Body weight ≥110 pounds
- •Fitzpatrick skin type 1,2 and 3.
排除标准
- •pregnancy
- •breast-feeding
- •impaired fasting glucose
- •frequent alcohol use
- •history of skin cancer
- •sunbathing and the use of tanning bed, intake of vitamin/mineral supplements
- •habitual high intake of fruits (≥ 2 cups daily)
- •intake of medication that might influence the outcome of the study
研究组 & 干预措施
Pulse Diet
Participants will consume cooked pulses on an alternating basis over the 10-week intervention period. The pulses consist of 455 grams of the tri-bean blend (kidney, pinto, black bean), equivalent to 350 calories, and 225 grams of black lentils (400 calories).
干预措施: Pulse Diet (Other)
Control Rice Diet
Participants will consume cooked white rice (375 calories) over 10 weeks
干预措施: Control Rice Diet (Other)
结局指标
主要结局
Skin sensitivity after UV radiation
时间窗: 84 days
Irradiation will be applied to dorsal skin (back, scapular region not typically exposed to the sun) with 2 times of minimal erythema dose using an FDA approved UVB phototherapy light and a UV light meter. At baseline and after 70 days, skin color will be measured before and 24 hours after irradiation. Skin color will be evaluated by a colorimeter. The a\*-value (red/green-axis) is a measure of reddening (erythema).
Skin sensitivity after UV radiation
时间窗: 100 days
Irradiation will be applied to dorsal skin (back, scapular region not typically exposed to the sun) with 2 times of minimal erythema dose using an FDA approved UVB phototherapy light and a UV light meter. At baseline, after 56 and 112 days, skin color will be measured before and 24 hours after irradiation. Skin color will be evaluated by a colorimeter. The a\*-value (red/green-axis) is a measure of reddening (erythema).
次要结局
- skin pH(84 days)
- skin hydration(84 days)
- skin transepidermal water loss(84 days)
- skin erythema and melanin index(84 days)
- inflammation biomarkers(84 days)
- oxidative stress biomarkers(84 days)
- skin microbiome(84 days)
- skin transepidermal water loss(100 days)
- skin erythema and melanin index(100 days)
- inflammation biomarkers(100 days)
- oxidative stress biomarkers(100 days)
- skin microbiome(100 days)
- skin hydration(100 days)
- skin pH(100 days)