Marine collagen: a daily sachet for youthful skin and stronger hair?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Healthy adults aged 40-60 years at the time of enrollment. * Self-reported visible signs of skin aging, including at least one of the following: fine lines, wrinkles, reduced skin firmness or elasticity, or skin dryness. * Self-reports hair shedding and a desire to improve hair health. * Willing to take one sachet of the study product daily for 12 weeks as directed. * Willing to avoid taking any other collagen-containing dietary supplements for the duration of the study. * Willing to maintain current diet, skincare routine, sleep patterns, and physical activity levels for the duration of the trial. * Willing and able to submit standardized facial and hair photographs at Baseline and Week 12. * Has access to a smartphone or digital camera capable of producing photographs. * Resides in the United States. * Willing to follow the study protocol and complete all required questionnaires. Exclusion Criteria: * Known allergy or sensitivity to fish, marine-derived products, or any of the study product ingredients (marine collagen, hyaluronic acid, ascorbic acid, biotin). * Previous diagnosis of a hair loss condition such as alopecia areata, androgenetic alopecia, or telogen effluvium. * Currently taking any collagen-containing dietary supplements, or planning to start taking any collagen supplements in the next 12 weeks. * Any current uncontrolled chronic medical condition that would prevent the participant from safely completing the study protocol. * History of a diagnosed dermatological condition that significantly affects facial skin appearance (e.g., severe eczema, psoriasis, rosacea, or active acne) and could confound assessment of skin aging outcomes. * Use of prescription retinoids, injectable dermal fillers, botulinum toxin, chemical peels, laser skin treatments, or other professional aesthetic procedures on the face within 3 months prior to enrollment or planned during the study period. * Currently pregnant, breastfeeding, or planning to become pregnant during the study period. * Currently participating in another research study or planning to participate in another study during this study's duration. * Any condition that, in the judgment of the investigator, would make the participant unsuitable for inclusion in the study.