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

Clinical Trial to Determine the Efficacy of Almonds for Skin Radiance, Inflammation and Aging in Asian Females: A Pilot Study

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.

Study Overview

• Status: Completed
• Conditions: Skin Laxity
• Intervention / Treatment: Other: Almond; Other: Pretzel

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 Type: Interventional
• Enrollment (Actual): 40
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • California
    • Los Angeles, California, United States, 90095
      • UCLA Center for Human Nutrition

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 50 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Female

Description

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.

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.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Almonds; Consume 1.5 oz. serving almonds (246 calories) daily for 12 weeks	Other: Almond; Consume 1.5 oz. serving almonds (246 calories) daily for 12 weeks
Active Comparator: Pretzels; Consume 2 oz. serving pretzels (216 calories) daily for 12 weeks	Other: Pretzel; Consume 2 oz. serving of pretzels (216 calories) daily for 12 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Skin radiance	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.	12 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
UV radiation sensitivity	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.	12 weeks
Skin aging (elasticity, sebum, and hydration/moisture)	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.	12 weeks

Collaborators and Investigators

• Sponsor: University of California, Los Angeles
• Collaborators: Almond Board of California
• Investigators: Principal Investigator: Zhaoping Li, University of California, Los Angeles

Study record dates

Study Major Dates

• Study Start (Actual): July 25, 2019
• Primary Completion (Actual): January 23, 2020
• Study Completion (Actual): January 23, 2020

Study Registration Dates

• First Submitted: April 9, 2020
• First Submitted That Met QC Criteria: April 16, 2020
• First Posted (Actual): April 20, 2020

Study Record Updates

• Last Update Posted (Actual): April 20, 2020
• Last Update Submitted That Met QC Criteria: April 16, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: skin; aging; almonds
• Additional Relevant MeSH Terms: Pathologic Processes; Inflammation
• Other Study ID Numbers: 18-002001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No