Quality Vitamin C+ in adults with suboptimal and adequate vitamin C levels

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a randomized, double-blind, placebo-controlled study in healthy adults aged 25 to 75, stratified by baseline vitamin C status (suboptimal vs adequate). Participants take two capsules daily for 28 days, with blood vitamin C measured at the start and end of the study. The trial uses four arms (suboptimal with Qualia C+, suboptimal with placebo, adequate with Qualia C+, adequate with placebo) to assess changes in whole-blood vitamin C levels, primarily in the suboptimal group, and to explore overall effects. Data collection includes laboratory blood draws and questionnaires, with analyses adjusting for baseline vitamin C, age, and sex.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Provide voluntary, written, informed consent to participate in the study.
* Agree to provide a valid cell phone number and are willing to receive communications through text.
* Can read and write English.
* Willing to complete questionnaires, records, and diaries associated with the study.
* Healthy male and female participants aged 25 to 75 years old.
* Willing to go to an Ulta Labs Patient Service Center location for a Blood Vitamin C Test (baseline and Day 29) and located within a convenient distance of participating locations. The services offered by Ulta Lab Tests are available only in the United States and not to residents of the states of New Jersey, New York, and Rhode Island.
* Willing to avoid starting new or stopping any existing dietary supplements throughout the study.
* Willing to maintain a consistent diet throughout the study.

Exclusion Criteria:

* Women who are pregnant, breastfeeding, or planning to become pregnant or start breastfeeding during the trial.
* Known food intolerances/allergy to any ingredients in the product.
* Having any of the following conditions: Psychiatric conditions, neurologic disorders, endocrine disorders, cancer.
* Having had a significant cardiovascular event in the past 6 months.
* Taking MAO inhibitors, SSRIs, or any other psychiatric or neurological medicines.
* On immunosuppressive therapy.
* Adults lacking capacity to consent.

Where it's running

• Qualia Life Sciences
  Carlsbad, California, United States Recruiting

Study contacts

• Principal investigator: Colin Gardner, PhD — Qualia Life Sciences
• Study coordinator: Colin Gardner, PhD
• Email: colin@qualialife.com
• Phone: 678-387-7924

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.