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Congratulations to Common Heir for completing their clinical trial with Citruslabs

Effective skincare that is good for consumers and the planet

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About Common Heir

Skincare - but make it environmentally friendly

Founded in 2020 by Cary Lin and Angela Ubias, Common Heir strives to transform beauty traditions by offering clean, plastic-free, high-performance skincare. All of their products are plastic-free, cruelty-free, biodegradable, and silicone-free. Their first product is a vitamin C serum for which Citruslabs conducted a clinical study in 2021. 

With Cary and Angela being beauty-industry veterans, clinical validation is part of Common Heir's brand identity. It is very important to them to not only provide consumers with environment-friendly skincare but also efficacious skincare. 

The product

Common Heir combines thoughtful sourcing with clean, efficacious ingredients to craft premium, luxurious products. The formulation uses a 10% concentrated form that is stable, effective, and goes deeper to absorb better. 

Study design

This was an open-label observational single-arm clinical trial to study the efficacy of a vitamin C serum and its effect on the skin with a specific focus on hydration, glowing skin, dark spots as well as skin texture and skin tone.

The participants

A total of 40 women were recruited for this trial. Each of the participants was screened and deemed eligible to participate based on inclusion and exclusion criteria. The trial was run virtually using a technology platform. The participants in the trial took the vitamin C serum, for twelve weeks. 33 participants finished the entire study and completed the questionnaires at all measurement points.

Abstract

Study to Evaluate the Efficacy of Asystems' Complete Calm Supplementation on Sleep Quality and Duration, Anxiety, and Stress

Aims & Objectives: This was an open-label observational single-arm clinical trial to study the efficacy of a vitamin C serum and its effect on skin tone, skin texture, skin hydration, and dark spots.

Study design: Interventional and observational.

Methods: A total of fourty (40) individuals were recruited for this study. Enrolled participants were female-only, between 18-55 years old. All participants were presenting (self-perceived) one or several of the following: experience age spots, acne scars, dull-looking, but otherwise normal skin. 

Results: The vitamin C serum was very effective in helping participants get a more even skin tone, improving the feeling of more hydrated skin, reducing dark spots, and leaving the skin more "glowing" and smooth. 

Conclusion: Participants experienced substantial improvements in texture and evenness of skin tone. These improvements demonstrate the efficacy of Common Heir's vitamin C serum for helping individuals in seeing visible changes and improvements in their skin.

Results

A high-performance vitamin C serum that is as good for the planet as it is for the skin

The use of Common Heir vitamin C serum was associated with an overall healthier-looking skin and a reduction in dark spots through participant self-reported data after the eight week study period. Participants also reported increased hydration of the skin and an improvement in the appearance of fine lines. After the eight week intervention period, 89.74% of participants reported that they enjoyed Common Heir's vitamin C serum results. In addition, the following benefits were experienced by the study cohort: 

In addition to the four-week and eight-week results, the one-time use of the Vitamin C serum was associated with several benefits including smoother skin feel and healthier-looking skin. The vast majority of participants also reported no negative effects of the serum in regard to "dry out skin" or the natural scent of the product. 

As noted above in the table, the results of this study indicate that regular intake of Common Heir's vitamin C serum can provide improvement in skin tone and texture, improvements in the lightening of age-related dark spots, and improved appearance of a healthy-looking and less dull skin. Regular intake of the vitamin C serum was found to be effective and well-tolerated by the participants in the study. These findings show promise for the use of a vitamin C serum as part of a healthy skin routine.  

About Citruslabs

Clinical trials for consumer brands 

Citruslabs’ mission is to provide robust, affordable clinical trials for brands. We are setting new standards for creating research-backed product claims for supplements, skincare products, devices, CBD products, health foods, and superfoods.

Citruslabs’ mission is to provide robust, affordable clinical trials for brands. We are setting new standards for creating research-backed product claims for supplements, skincare products, devices, CBD products, health foods and superfoods.

We can do it all

Study design

IRB process

Patient recruitment

Patient adherence 

Data collection

Data analysis

Product claims

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