Oral Probiotics on the Shift in Gut Microbiome and Skin Carotenoid Levels

Status unconfirmed · Not applicable

Conditions studied: Human Microbiome

In brief

The purpose of this study is to determine how probiotics affects circulating carotenoid levels.

Key facts

Study ID

NCT04841694

Run by

Integrative Skin Science and Research

People needed

25

Starts

2021-06-01

Expected to finish

2022-03-01

Last updated by the study team

2021-05-03

Who can join

Age: 40 and older. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Subjects aged 40+
• Must be willing to comply with all protocol requirements
• Must be willing to have flash photo facial images taken with the imaging systems
• Fitzpatrick skin type II, III, or IV

You may not qualify if…

• Any systemic or antibiotics (injected or oral) within 6 months of starting study
• Any topical antibiotic or Vitamin A within 1 month of starting study or any subject unwilling to refrain from washout of topical antibacterial or vitamin A ingredient.
• Any oral probiotic or prebiotic supplementation within past 1 month at the discretion of the investigator.
• Limit total fruit and vegetable intake to 2.5 servings (1 serving=1 cup) per day of high carotenoid foods. High carotenoid foods include spinach, summer squash, carrots, citrus fruits, celery, kale, tomatoes, and cantaloupe
• Subjects must have no history of malignancy or cancer (excluding skin cancer unless there is a history of metastasis) or diagnosis of gastrointestinal inflammatory diseases, no history or diagnosis of epilepsy, no history or diagnosis of immunologic or infectious disease (e.g. hepatitis, tuberculosis, HIV or AIDS, lupus, rheumatoid arthritis)
• Has a condition or is on medication the investigator and/or designee believe could jeopardize the safety of the subject, interfere with the evaluation, or confound the interpretation of the study results
• Women who have been pregnant in the last three months, are pregnant, preparing to be pregnant or lactating.
• Is participating in a concurrent intervention based clinical research study
• Those with BMI higher than 35 kg/m²
• Commencement of a new diet (such as the ketogenic diet) or supplements within the 1 month prior to initiating participation, at the discretion of the investigator.
• Is participating in or has participated in a intervention based facial study at this or any other facility in the past 2 weeks. Participation in survey-based studies are approved at the discretion of the investigator.
• Has a skin disease on face that will interfere with image collection and assessment in the opinion of the investigator
• Refusal to shave or remove facial hair that may interfere with image collection and assessment.
• Persons unwilling to avoid the following during the 4 weeks prior and during the duration of the study: self-tanning, spa tanning, sun tanning, or artificial tanning.
• Known allergy or irritation to the supplement utilized in the study
• Persons unwilling to avoid sun exposure to the inner forearm
• Current tobacco smokers, OR those that have smoked tobacco over the past year, OR a 5 year-pack year history of smoking tobacco
• Cutaneous photosensitivity at wavelengths of 400-450 nm
• Porphyria or known allergies to porphyrins
• Prisoners
• Adults unable to consent

Where it is running

• Integrative Skin Science and Research — Sacramento, California, United States

Full record on ClinicalTrials.gov

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