The Effect of Almonds on Facial Aesthetics and Modulation of the Microbiome and Lipidome

NCT ID: NCT03729700

Last Updated: 2021-07-07

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 60 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-10-22
• Study Completion Date: 2021-06-22

Brief Summary

The investigator hypothesizes that regular consumption of almonds will 1) improve the facial wrinkle severity in post-menopausal women, 2) improve the evenness of facial skin pigmentation, 3) diversify the gut microbiome and increase the short chain fatty acids in the blood, and 4) improve the skin barrier biophysical properties.

Detailed Description

This study will be a 24 week supplementation study that utilizes two study groups: 1) control group and 2) almond supplementation: 20% energy intake. This will be a randomized, rater-blinded, and controlled study. There will be a total of 60 subjects, with 30 assigned to the control group and 30 assigned to almond supplementation.

Subjects will be recruited from the UC Davis Dermatology Clinic, UC Davis Main campus, California State University- Sacramento, and from the surrounding community physicians and the community in a 100 mile radius. The greater Sacramento area has a population of over 2 million to draw from and recruitment will be conducted through the use of Social Media and flyer based recruitment. Postmenopausal women have previous been recruited successfully in a previous study. The study visits will be performed at the UC Davis Dermatology Clinic located at 3301 C Street, Suite 1400, Sacramento, CA 95816.

Investigators will collect medical history and current medications from study participants- this is outlined in the HIPAA form. The two intervention groups will consist of those receiving almonds and those that are receiving a calorie matched snack. The almond dose will be provided as 20% of total energy (20% E) in the diet. This dose was selected based on a previous randomized trial examining lipid parameters in response to 0, 10%, and 20% E as dietary almonds and a recent meta-analysis of intervention trials of tree nuts [5, 6]. The control snack will be a typical western diet snack (see Table 1) . The calorie matched snacks are commercially available prepackaged snack items that will be purchased from Costco. Once a subject has met inclusion criteria and has signed IRB consent, anthropometric data will be obtained, 1-24 hour recall will be collected, training will be provided for recording dietary records, and estimated caloric needs will be calculated. Estimated energy needs (EER) will be determined using the Mifflin-St. Jeor equation and total daily energy needs (TDE) calculated as EER x activity factor of 1.3-1.5 for sedentary to average activity, or a higher activity level as indicated. A representative example of a 60 year old woman, 5'4", 140 pounds with typical activity level yields TDE of approximately 1,600 - 1,800 kcal/day, and 20% E of 320-360 kcal/day. The intervention and control snacks would be 56.7 g of almonds and 56.7 g pretzel + one-24 g chewy granola bar, respectively.

Conditions

Wrinkle

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Almond supplementation

The almond dose will be provided as 20% of total energy (20% E) in the diet. This dose was selected based on a previous randomized trial examining lipid parameters in response to 0, 10%, and 20% E as dietary almonds and a recent meta-analysis of intervention trials.

Group Type: EXPERIMENTAL

Almond

Intervention Type: OTHER

The almond dose will be provided as 20% of total energy (20% E) in the diet.

Control snack

The control snack will be a typical western diet snack. The calorie-matched control snack will be commercially available individually wrapped food products.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Almond

The almond dose will be provided as 20% of total energy (20% E) in the diet.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Postmenopausal women
• Fitzpatrick skin types 1 and 2
• Able to follow dietary intervention and attend all study visits

Exclusion Criteria

• Those with a nut allergy
• Current smokers, those that have smoked within the past year, and former smokers with greater than a 20 pack-year history of smoking, as smoking is a independent risk factor and serves as a confounder for the development of facial wrinkles
• Those with an autoimmune photosensitive condition or a known genetic condition with a deficiency in collagen production (such as Ehler-Danlos), as this can be a confounder for the development of facial wrinkles
• Those that already obtain 20% of their energy intake from nut consumption
• Those with implausible reported energy intakes of <1,000 kcal/d or >3,000 kcal/d
• Individuals who are unwilling to discontinue vitamin E containing supplements and food sources during the washout and intervention

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 100 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: No

Sponsors

University of California, Davis

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

UC Davis Department of Dermatology, Clinical Trials Unit

Sacramento, California, United States

Countries

United States

Other Identifiers

1257688

Identifier Type: -

Identifier Source: org_study_id