Eligibility Criteria

You can participate in this study if you:

• Are 30–50 years old
• Are generally healthy and do not have chronic medical conditions
• Do not smoke
• Have no history of skin disease or unusual sensitivity to sunlight
• Have not used tanning beds in the last 6 months
• Are not currently taking antibiotics, photosensitizing medications, hormone therapy, or medicated creams on your arms
• Are not immune-compromised and have not received an organ transplant
• Have no food allergies or sensitivities (including blueberries or berries)
• Have no allergies to medical adhesives or tapes
• Have healthy skin on your arms (no rashes, wounds, or active irritation)
• Are willing to avoid sun exposure on your arms and follow study product-use instructions

Study Requirements

• Complete an online pre-qualification survey to determine eligibility.
• Attend 1 consent and screening visit and 11 additional lab visits over a 14-week period (each visit lasting approximately 30–45 minutes).
• Consume one daily powder (wild blueberry powder or placebo), mixed with water, each morning with breakfast for 14 weeks.
• Provide urine and stool samples the day before select lab visits.
• Undergo non-invasive skin measurements, skin swabs, and tape-strip skin sampling at select lab visits.
• During the final 2 weeks, you will receive brief, controlled UV light exposure to a small area of one forearm. This may cause temporary mild redness and is similar to about 45–60 minutes in the sun on a cloudy day or 20–25 minutes at the beach on a sunny day without sunscreen.

Compensation

• Compensation of up to $750 for completing the study. Withdrawal from the study before completion will reduce compensation.