The Effect of a Healthy Snack on Radiance, Aging and Inflammation of the Skin

Not Applicable

Completed

• Conditions: Skin Laxity
• Interventions: Other: Pretzel; Other: Almond

• Registration Number: NCT04352504
• Lead Sponsor: University of California, Los Angeles

Brief Summary

The anti-oxidative and anti-inflammatory effects of polyphenolic compounds of almonds have been reported in limited animal studies and may have the potential to improve skin radiance. However, the skin related beneficial properties of almonds have not been investigated in humans. This study will examine the effects of almond consumption on human skin radiance in Asian women as a pilot.

Detailed Description

This study is a randomized, parallel group comparison of almonds vs. isocaloric pretzels carried out in accordance with the guidelines of the Human Subjects Protection Committee of the University of California, Los Angeles. All subjects will give written informed consent before the study begins. Subjects will consume 1.5 serving of almonds (\~ 1.5 oz/d for 246kcal) or isocaloric pretzels (\~ 2.0 oz/d for 216kcal) daily for 12 weeks and will undergo skin assessment at weeks 0, 4, 8 and 12. The assessments include skin radiance, sebum, and hydration/moisture. In addition the study will evaluate the effect of almond consumption on skin inflammation and aging by assessing UV-induced changes. Each group will have 20 subjects.

Study Timeline

• Study Start: 2019-07-25
• Primary Completion: 2020-01-23
• Study Completion: 2020-01-23
• Status Verified: 2020-04
• Study First Submitted: 2020-04-09
• Study First Submitted QC: 2020-04-16
• Last Update Submitted: 2020-04-16
• Study First Posted: 2020-04-20
• Last Update Posted: 2020-04-20

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 40

Inclusion Criteria

• Healthy Asian females age 18-50 years' old (inclusive)
• Typically consume low fiber/polyphenol diet (beige diet)
• In good health with a BMI of 22 to 30 kg/ m2 (inclusive)
• Non-smokers
• Fitzpatrick Skin type II-IV
• Willing to maintain their normal skin care pattern for the duration of the study
• Willing to maintain their normal diet for the duration of the study but avoid almonds and pretzels.
• Subjects must read and sign the Institutional Review Board-approved written informed consent prior to the initiation of any study specific procedures or enrollment. A subject will be excluded for any condition that might compromise the ability to give truly informed consent.

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Exclusion Criteria

• Eating a high fiber/polyphenol diet or taking any medication or dietary supplement which interfere with the absorption of polyphenols.
• Women who are pregnant, lactating or trying to become pregnant.
• Currently taking any skin related prescription medication or supplements for less than 3 months.
• Currently consuming >14 alcoholic drinks (1 drink = 12 fl oz beer, 4 fl oz wine or 1.5 fl oz liquor) per week and/or unwilling to limit intake to less than 3 drinks per week during study participation or history of alcohol dependency.
• Screening laboratory value outside of the laboratory normal range that is considered clinically significant for study participation by the investigator.
• History or current diagnosis of serious medical condition such as Type I or Type II diabetes, major surgery, thyroid disease, heart problems (e.g. angina, bypass surgery, myocardial infarction, etc.), presence of implanted cardiac defibrillator or pacemaker, uncontrolled hypertension/high blood pressure, gastrointestinal disorders including chronic malabsorptive conditions, peptic ulcer disease, Crohn's disease, chronic diarrhea or active gallbladder disease, inflammatory bowel disease, fatty liver or cancer.
• Known allergy to almonds.
• Participation in another clinical trial within 30 days prior to enrollment.
• Any known clinically significant food allergy or intolerance.
• Currently taking any prescription medication or supplements for less than 3 months.
• Is unable or unwilling to comply with the study protocol.
• Subjects who cannot avoid excessive exposure to either natural or artificial sunlight.
• Received a nasally-delivered steroid, antibiotics within the past 14 days.
• Used topical antibiotic or topical steroid on the face,currently taking any prescription medications that increase the risk of photosensitivity or history of taking such medications in the less than 3 months (e.g. alpha-hydroxy acids in cosmetics, antibiotics (ciprofloxacin, doxycycline, levofloxacin, ofloxacin, tetracycline, trimethoprim), antifungals (flucytosine, griseofulvin, voriconazole), antihistamines (cetirizine, diphenhydramine, loratadine, promethazine, cyproheptadine)
• Subjects with a significant medical history or concurrent condition that the investigator(s) feel is not safe for the study
• Is unable or unwilling to comply with the study protocol.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Pretzels	Pretzel	Consume 2 oz. serving pretzels (216 calories) daily for 12 weeks
Almonds	Almond	Consume 1.5 oz. serving almonds (246 calories) daily for 12 weeks

Primary Outcome Measures

Name	Time	Method
Skin radiance	12 weeks	Determine the clinical efficacy of almond consumption on skin radiance. The main criteria will be evaluated by clinical scoring using the coloring, luminosity, brightness, and transparency (C.L.B.T.TM)(18) scale and imperfections scale (dark circles, redness/rosacea, spots, and heterogeneity). The C.L.B.T.TM methodology allows assessing different descriptors of the complexion: coloring, luminosity, brightness, and transparency of facial skin.

Secondary Outcome Measures

Name	Time	Method
UV radiation sensitivity	12 weeks	Evaluate the effect of almond consumption on skin inflammation and aging by assessing UV-induced changes. This will done using the smallest dose of UV-B radiation capable of inducing erythema (minimal erythema dose \[MED\]). The minimal erythema dose (MED) is determined for each subject before (week 0) and after (week 12) the intervention. Prior to testing, the skin type will be evaluated based on the Fitzpatrick Skin Type scale. Participants with Fitzpatrick skin type 2-4 were included in the study and assessed for differences in their response to UV-B induced skin changes before and after 12 weeks of study intervention.
Skin aging (elasticity, sebum, and hydration/moisture)	12 weeks	Assess the effect of almond consumption on skin biological characteristics of elasticity, sebum, and hydration/moisture content using the Cutometer® Skin Elasticity Meter 580 (Courage and Khazaka Electronic GmbH, Cologne, Germany). The Cutometer measures the vertical deformation of the skin in millimeters when the skin is pulled by means of a controlled vacuum into the circular aperture, 6 mm in diameter, of the probe. In its standard configuration, the Cutometer is equipped with a measuring probe with a 2 mm aperture because the device is originally designed to measure only the elastic properties of the epidermis. Skin hydration will measured using the moisture/hydration probe that attaches to the Cutometer. The six sites measured include: forehead, under the eye, frontal cheek, crow's foot, lateral cheek, and inner forearm.

Trial Locations

Locations (1)

UCLA Center for Human Nutrition; 🇺🇸 Los Angeles, California, United States